MCK EXTender PBXgateway II Service manual

Quality is our job. Customer satisfaction is our mission!
M-GWY2-MXM Rev AF
May 24, 2004
PBXgateway
TM
II
System Administrator’s Guide

PBXgateway II System Administrator’s Guide 2
Copyright
© Copyright 2005 Citel Technologies All rights reserved.
No part of this publication, including text, examples, diagrams, or icons, may be reproduced, transmitted,
or translated in any form or by any means, electronic, mechanical, manual, optical or otherwise, for any
purpose, without prior written permission of Citel Technologies.
Information in this publication is subject to change without notice. Citel Technologies may have patents or
pending patents applications, trademarks, copyrights, or other intellectual property rights covering subject
matter in this publication. The furnishing of this document does not give you license to these patents,
trademarks, copyrights, or other intellectual property.
Trademarks
© 2004 Citel Technologies All rights reserved.
MCK, the MCK logo, PBXgateway I, PBXgateway II, MCK EXTender 1000, MCK EXTender 3000, MCK
EXTender 4000, MCK EXTender 6000 and MCK EXTender 7000 are trademarks or registered
trademarks of Citel Technologies or its wholly-owned subsidiaries in the United States and other
jurisdictions. All other trademarks, registered trademarks and service marks are the property of their
respective owners.

PBXgateway II System Administrator’s Guide 4
Table of Contents
Table of Contents......................................................................................................................................4
Safety and Warranty ...................................................................................................................................9
Lifeline or 911 Phone Notice..................................................................................................................9
Important Safety Instructions.................................................................................................................9
Support Telephone Number.............................................................................................................11
Security of Your System: Preventing Toll Fraud..............................................................................11
FCC Regulations..............................................................................................................................11
Limited Warranty..............................................................................................................................12
About this Manual....................................................................................................................................13
Intended Audience ...........................................................................................................................13
Terms and Conventions...................................................................................................................13
Chapter 1: Product Overview..................................................................................................................15
Features...............................................................................................................................................17
Compatible Remote Units....................................................................................................................17
What is the EXTender 4000 for IP?.....................................................................................................17
What is the EXTender 3000 for ISDN?................................................................................................17
What is the Analog EXTender 1000 for PSTN? ..................................................................................17
What is the Mobile EXTender for Cellular and Analog Telephones?..................................................17
PBX EXTender and PBXgateway II Compatibility ...........................................................................18
Types of Network Connections............................................................................................................18
Voice Transmission..........................................................................................................................18
Synchronous-vs Asynchronous Transmission.................................................................................18
(VoIP) ...............................................................................................................................................18
Connections vs. Remotes....................................................................................................................19
Typical Installations..............................................................................................................................20
ConneX Feature Support (Meridian/Norstar/Definity)..........................................................................22
Dialback Modes................................................................................................................................22
ConneX Call Prompts.......................................................................................................................23
Synchronous-Serial Connection..........................................................................................................24
Asynchronous-Serial Connection ........................................................................................................25
Voice Over IP (VoIP)............................................................................................................................26
Digital Telephone/PBX Features .........................................................................................................27
Mobile EXTender.................................................................................................................................27
Call Suspend........................................................................................................................................28
Normal Behavior...............................................................................................................................28
Reconnection Failures......................................................................................................................28
Rebooting the Remote or the Gateway............................................................................................28
Gateway...........................................................................................................................................28
Dynamic Reconfiguration.................................................................................................................28
Call Suspend Modes........................................................................................................................29
Fax and Modem Traffic (Avaya and Meridian) ....................................................................................29
Voice Compression vs. Bandwidth......................................................................................................30
Physical Characteristics.......................................................................................................................31
Configuration and Management ..........................................................................................................32
Diagnostic Capabilities.........................................................................................................................33
Chapter 2: Specifications........................................................................................................................35
Specifications ..........................................................................................................................................36
Regulatory Approvals.......................................................................................................................36
System Architecture.........................................................................................................................36
Memory ............................................................................................................................................36
WAN Ports........................................................................................................................................36
Interfaces..........................................................................................................................................36
Voice Compression..........................................................................................................................36
Protocols and Services.....................................................................................................................36
Electrical Specifications ...................................................................................................................36

PBXgateway II System Administrator’s Guide 5
Mechanical Specifications................................................................................................................36
Environmental Specifications...........................................................................................................37
Chapter 3: Installation .............................................................................................................................39
Safety Checklist...................................................................................................................................40
Hardware Components........................................................................................................................41
Pre-Installation Requirements .............................................................................................................43
Supplied Equipment.........................................................................................................................43
Customer Supplied Equipment ........................................................................................................43
Network Requirements.....................................................................................................................43
Power Requirements........................................................................................................................44
Location Requirements ....................................................................................................................44
Installation............................................................................................................................................45
Connections to the PBX...................................................................................................................45
Mounting the PBXgateway II............................................................................................................47
Connections to the Network Device.................................................................................................48
Wiring Info........................................................................................................................................49
Compatible Remote Units....................................................................................................................52
Network Requirements.....................................................................................................................52
Mobile EXTender Installation...............................................................................................................53
Operating the Mobile EXTender.......................................................................................................53
Chapter 4: Configuration.........................................................................................................................55
What a System Administrator must know............................................................................................56
Connecting to the Management Interface (MI)....................................................................................58
Direct Serial Connection ..................................................................................................................58
Dial-Up Connection..........................................................................................................................58
Internet Access....................................................................................................................................59
Login Procedures.............................................................................................................................59
EXTender Window ...........................................................................................................................59
Remote Access using a 3Com Modem ...............................................................................................60
Enhanced Terminal Interface (ETI) Set up..........................................................................................61
Telnet Connection............................................................................................................................62
MI Welcome Screen.............................................................................................................................63
Help Screen.........................................................................................................................................64
Typical Menu........................................................................................................................................65
Menu Components...............................................................................................................................66
Command Keys................................................................................................................................67
Network Environments.........................................................................................................................68
Synchronous-Serial Device Configuration (RVP_Direct).....................................................................69
Optional Configuration......................................................................................................................70
Asynchronous-Serial Device Configuration (RVP_Direct)...............................................................71
IP Network Configuration (RVP_IP).....................................................................................................73
Prerequisites for Configuration.........................................................................................................73
Optional Configuration......................................................................................................................74
Required PBXgateway II Parameters..................................................................................................75
Port Set up...........................................................................................................................................76
<Default> vs. Individual Port Settings..............................................................................................76
Setting Voice Parameters ................................................................................................................77
Enabling/Disabling Telephony Ports................................................................................................79
Enabling/Disabling Auto Connect.....................................................................................................80
Setting a Connect Password............................................................................................................81
Set User ID.......................................................................................................................................81
Set Port Description .........................................................................................................................82
Set Banner Display...........................................................................................................................83
Set Logout Code ..............................................................................................................................83
WAN Port Set up..............................................................................................................................84
Enabling/Disabling WAN Ports.........................................................................................................85
Setting the Mode (signaling protocol)...............................................................................................85
Setting the Sync Rate.......................................................................................................................86

PBXgateway II System Administrator’s Guide 6
Setting the Async Parameters.............................................................................................................86
Setting Jitter and Compression........................................................................................................88
Setting the Voice Parameters ..........................................................................................................88
IP Parameters......................................................................................................................................89
IP Address Parameters....................................................................................................................89
SNMP Setup.....................................................................................................................................90
Telnet/FTP Setup.................................................................................................................................93
Enabling/Disabling Telnet ................................................................................................................93
Enabling/Disabling FTP....................................................................................................................93
DNS Set up ......................................................................................................................................94
Enabling/Disabling DNS...................................................................................................................94
SMTP (Simple Mail Transfer Protocol) Server Set up .....................................................................94
Configuring the SMTP Server..........................................................................................................95
System Parameters .............................................................................................................................95
Assign a Name to the PBXgateway II..............................................................................................95
Console Baud...................................................................................................................................96
Utilities..................................................................................................................................................97
Setting the Date................................................................................................................................97
Setting the Administrator’s Password ..............................................................................................98
Utilities – Modem Card Test for EXTender 1000.............................................................................99
Optional PBXgateway II Parameters.......................................................................................................99
2:1 Configuration..................................................................................................................................99
Simultaneous RVP and RVP_IP Connections...............................................................................101
Dial-Up Management Console and Modem Support.....................................................................101
DiffServ Support.............................................................................................................................101
Associated Voice............................................................................................................................102
Enabling B2 for Analog...................................................................................................................102
EXTender 1000 and 3000 User List Configuration............................................................................103
Viewing All Authorized Users.........................................................................................................104
Deleting a User...............................................................................................................................105
Editing a User.................................................................................................................................105
EXTender 1000 and 3000 Port Configuration ...................................................................................106
Individual Port Configuration..........................................................................................................106
Multiple (Default) Port Configuration..............................................................................................108
Enabling ConneX...............................................................................................................................110
ConneX Port Parameters...................................................................................................................112
Setting up Caller ID........................................................................................................................113
Setting Call Suspend .........................................................................................................................115
Console Setup Wizard.......................................................................................................................116
Login to Alternate Remote Units........................................................................................................117
System Reboot ..................................................................................................................................118
Logout................................................................................................................................................118
Chapter 5: The Management Interface (MI) .........................................................................................119
The Management Interface ...................................................................................................................120
MI Parameters ...................................................................................................................................122
Address..........................................................................................................................................122
Async Rate.....................................................................................................................................122
Auto Connect..................................................................................................................................122
Banner............................................................................................................................................123
Begin Test (IP) ...............................................................................................................................123
Begin Test (WAN) ..........................................................................................................................123
Clear Log........................................................................................................................................123
Community.....................................................................................................................................124
Console Baud.................................................................................................................................124
Companding (Voice).......................................................................................................................124
Default Router................................................................................................................................125
Description .....................................................................................................................................125
DNS................................................................................................................................................125

PBXgateway II System Administrator’s Guide 7
DTMF .............................................................................................................................................126
Dump All.........................................................................................................................................126
Edit Config......................................................................................................................................126
Email ..............................................................................................................................................127
FTP.................................................................................................................................................127
Gateway.........................................................................................................................................127
Host (Syslog)..................................................................................................................................127
ID (Syslog)......................................................................................................................................127
IP Destination.................................................................................................................................128
Jitter Delay .....................................................................................................................................128
Logout ............................................................................................................................................128
Logout Code...................................................................................................................................128
Method (Voice)...............................................................................................................................129
Mode (WAN)...................................................................................................................................129
Modem Card Test...........................................................................................................................129
MSB Key ........................................................................................................................................130
Optimize.........................................................................................................................................130
Packet Size ....................................................................................................................................130
Packet Trace..................................................................................................................................130
Password(Connect)........................................................................................................................131
Path (Voice)....................................................................................................................................131
Primary Interface............................................................................................................................131
Priority (Log)...................................................................................................................................132
Priority (Syslog)..............................................................................................................................132
Protocol (WAN) ..............................................................................................................................133
Reset Stats.....................................................................................................................................133
Secondary Interface.......................................................................................................................133
Size (Log).......................................................................................................................................134
Set Password (Admin)....................................................................................................................134
Subnet Mask ..................................................................................................................................134
Sync Setup.....................................................................................................................................135
SysContact.....................................................................................................................................135
SysLocation....................................................................................................................................135
Telnet .............................................................................................................................................135
Trap Host........................................................................................................................................136
Trap Path........................................................................................................................................136
Trap Priority....................................................................................................................................137
User ID...........................................................................................................................................137
Utilization........................................................................................................................................138
Web Server ....................................................................................................................................138
Chapter 6: Troubleshooting..................................................................................................................139
Introduction........................................................................................................................................140
1) System Checks..........................................................................................................................140
2) Voice Quality..............................................................................................................................140
3) Connectivity Issues....................................................................................................................140
Basic Set up Information................................................................................................................140
Network Checklist...........................................................................................................................140
PBXgateway II Unit Checklist.........................................................................................................141
Branch Office EXTender 6000 Unit Checklist................................................................................141
EXTender 4000 Unit Checklist.......................................................................................................141
EXTender 3000 Unit Checklist.......................................................................................................141
EXTender 1000 Unit Checklist.......................................................................................................141
Status LEDs - PBXgateway II and Branch Office EXTender 6000...............................................142
Power Up Sequence ......................................................................................................................142
Step #1 DRAM Tests......................................................................................................................142
Step #2 Selftest..............................................................................................................................143
Step #3 ROM Countdown..............................................................................................................143
Step #4 Runtime Image .................................................................................................................143

PBXgateway II System Administrator’s Guide 8
System Status LEDs ......................................................................................................................144
Port Status LEDs............................................................................................................................145
EXTender 4000 LEDs ....................................................................................................................146
Hardware/Software Revisions........................................................................................................147
2) Voice Quality..............................................................................................................................147
Audio Quality Concerns - Diagnosing Problem Type.....................................................................148
Audio Breakup................................................................................................................................148
Echo ...............................................................................................................................................148
Audio breakup using RVP_Direct...................................................................................................148
Audio Breakup Using RVP_IP........................................................................................................150
Management Reports - IP RX Stats...............................................................................................151
Steps to Correct Echo....................................................................................................................152
3) Connectivity Issues....................................................................................................................153
RVP_IP Menus...............................................................................................................................154
Chapter 7: File Management and System Upgrade............................................................................157
File Management...................................................................................................................................158
Changing the Active Config file..........................................................................................................159
Editing Non-Active Configuration Files..............................................................................................159
Creating a New Config File................................................................................................................160
Upgrading Firmware ..........................................................................................................................161
Glossary...................................................................................................................................................163
Appendix A: Bandwidth Requirements ................................................................................................170
Bandwidth Requirements for RVP_Direct..........................................................................................170
Overview............................................................................................................................................171
Number of Users................................................................................................................................171
Voice Compression............................................................................................................................171
Selecting the Proper Voice Compression ......................................................................................172
Appendix B: SNMP Parameters.............................................................................................................173
Introduction............................................................................................................................................174
MI Status Menu vs. MIB Group Table................................................................................................175
MIB Group Tables..............................................................................................................................177
SNMP Setup......................................................................................................................................183
Install the EXTender MIB Files.......................................................................................................183
Setting the Community Password..................................................................................................183
Configuring the Trap Host..............................................................................................................184
Trap Customization........................................................................................................................184
Defining a Warning Trap ................................................................................................................184
Defining an Info Trap......................................................................................................................184
Viewing the Customized Alarm Log...............................................................................................185
Procedure.......................................................................................................................................185
Using SNMP to Monitor & Troubleshoot........................................................................................185
Index......................................................................................................................................................186

PBXgateway II System Administrator’s Guide 9
Safety and Warranty
Lifeline or 911 Phone Notice
CAUTION: THIS IS NOT A LIFELINE or 911 PHONE.
If you dial 911 on your display telephone, when the telephone is connected to the Remote unit and linked
to the PBXgateway II, you will reach the 911 facility that serves the location of the corporate facility and
not the location of your Remote unit. To ensure that you reach the correct 911 service for your area, use
a telephone connected locally.
Note: Branch Office EXTender
 6000 Remote units provide an analog port for local dialing.
Important Safety Instructions
!
The exclamation point in an equilateral triangle is intended to alert the
user to the presence of important operating and maintenance
(servicing) instructions in the literature accompanying the product.
To reduce the risk of fire, electrical shock, and injury to persons when installing telephone equipment,
always follow basic safety precautions including:
 Read and understand all instructions.
 Follow all warnings and instructions marked on or packed with the product.
 Never install this unit, or the telephone wiring for it, during a lightning storm.
 Never install a telephone jack in a wet location unless the jack is specifically designed for wet
locations.
 Never touch non-insulated telephone wires or terminals unless the telephone wiring has been
disconnected at the network interface.
 Use caution when installing or modifying telephone lines.
 Do not install this product near water, for example, in a wet basement location.
 Do not overload wall outlets, as this can result in the risk of fire or electrical shock.

PBXgateway II System Administrator’s Guide 10
 Do not attach the power supply cord to building surfaces. Do not allow anything to rest on the power
cord. Do not locate this product where the cord will be abused by persons walking on it.
 Unplug the product from the wall outlet before cleaning. Use a damp cloth for cleaning. Do not use
cleaners or aerosol cleaners.
 Do not operate the system if chemical gas leakage is suspected in the area. Use telephones located
in some other safe area to report the trouble.
DO NOT open the PBXgateway II or Branch Office remote units. There are no user serviceable
parts inside. Only an authorized technician should open the unit for required maintenance or
upgrading purposes.
SAVE THESE INSTRUCTIONS
!

PBXgateway II System Administrator’s Guide 11
Support Telephone Number
Call the MCK Communications Help-line (at 1-888-454-5828), or your MCK Communications authorized
dealer if you need assistance when installing, programming, or using your system. Ask for customer
service. Outside the United States or Canada, contact your local MCK Communications representative.
Security of Your System: Preventing Toll Fraud
As a customer of a new telephone system, you should be aware that there is an increasing problem of
telephone toll fraud. Telephone toll fraud can occur in many forms, despite the concerted efforts of
telephone companies and telephone equipment manufacturers to control it. Some individuals use
electronic devices to prevent or falsify records of these calls. Others charge calls to someone else’s
number by illegally using lost or stolen calling cards, billing innocent parties, clipping on to someone
else’s line, or breaking into someone else’s telephone equipment physically or electronically. In certain
instances, unauthorized individuals make connections to the telephone network through the use of
remote access features.
Common carriers are required by law to collect their tariff charges. While these charges are fraudulent
charges made by persons with criminal intent, applicable tariffs state that the customer of record is
responsible for payment of all long-distance or other network charges. MCK Communications cannot be
responsible for such charges and will not make any allowance or give any credit for charges that result
from unauthorized access.
To minimize the risk of unauthorized access to your MCK Communications PBXgateway II, when
possible, restrict the off-network capability of off-premises callers, using calling restrictions, Facility
Restriction Levels, and Disallowed List capabilities.
When possible, block out-of-hours calling through Time-of-Day Routing. Frequently monitor system call
detail reports for quicker detection of any unauthorized or abnormal calling patterns.
Limit out-calling to persons on a need-to-have basis. The MCK Communications PBXgateway II, through
proper administration, can help you reduce the risk of unauthorized persons gaining access to the
network. However, telephone numbers and authorization codes can be compromised when overheard in
a public location, lost through theft of a wallet or purse containing access information, or when treated
carelessly (writing codes on a piece of paper and improperly discarding them).
Additionally, hackers may use a computer to dial an access code and then publish the information to
other hackers. Substantial charges can accumulate quickly. It is your responsibility to take appropriate
steps to implement the features properly, to evaluate and administer the various restriction levels, and to
protect and carefully distribute access codes.
Under applicable tariffs, you will be responsible for payment of toll charges. MCK Communications cannot
be responsible for such charges and will not make any allowance or give any credit resulting from
unauthorized access.
FCC Regulations
MCK Communications PBXgateway II, complies with FCC Part 15, Subpart B, Class B.
If the MCK Communications PBXgateway II causes harm to the telephone network, the telephone
company will notify you in advance that temporary discontinuance of service may be required. If advance
notice isn’t practical, the telephone company will notify the customer as soon as possible. Also, you will
be advised of your right to file a complaint with the FCC if you believe it is necessary.
The telephone company may make changes in its facilities, equipment, operations, or procedures that
could affect the operation of the equipment. If this happens, the telephone company will provide advance
notice in order for you to make the necessary modifications in order to maintain uninterrupted service.

PBXgateway II System Administrator’s Guide 12
Limited Warranty
MCK Communications Inc. warrants this equipment to be free of defects in materials and workmanship for
a period of one year from date of shipment. All defects within this time will be repaired without charge
upon return of the unit to the factory.
This warranty is null and void if the manufacturer determines that any modifications have been made to
the unit or the unit has been subjected to physical or electrical stress.
This warranty covers parts and labor only, and does not include shipping costs, travel expenses or travel
time.
Installation of the equipment is the sole responsibility of the purchaser. The manufacturer, its agents, or
distributors accept no responsibility for malfunction or damage caused by improper treatment or
connection of the unit.
The manufacturer, its agents, or distributors are not liable for any losses incurred through use or
malfunction of the equipment or any losses or damages incurred by the use of the equipment in any
means whatsoever.
This warranty is limited to the repair of the equipment to its normal functioning capability.
This warranty is complete as stated and all other warranties, expressed or implied, are invalid.
The PBXgateway II should be installed by qualified personnel. No user serviceable parts are contained
within the units. Installation or programming should not begin prior to review of all the chapters in this
manual.

PBXgateway II System Administrator’s Guide 13
About this Manual
Intended Audience
This manual is intended to help with the installation, configuration, and troubleshooting of the MCK
Communications PBXgateway II and compatible remote units. Additional information is provided for
remote products that can be ‘mixed & matched’ to communicate with the PBXgateway II depending on
the clients’ needs. This document is intended for use by anyone needing such information, including
system administrators, support personnel, and technicians.
Terms and Conventions
The MCK Communications PBXgateway IIwith ConneX features (2.15 sw release), is a multi-user
device and is henceforth referred to as the PBXgateway II or Gateway unit.
The MCK Communications’ remote products are henceforth referenced as follows:
 The MCK Branch Office EXTender6000 for Branch Offices is a multi-user device and is henceforth
referred to as the EXTender 6000 or Branch Office unit.
 The MCK EXTender 4000 for IP is a single client device and is henceforth referred to as the
EXTender 4000.
 The MCK EXTender 3000 for ISDN is a single client device and is henceforth referred to as the
EXTender 3000.
 The MCK Analog EXTender 1000u for PSTN is a single client device and is henceforth referred to as
the EXTender 1000.
 The MCK Mobile EXTender is a single client device and is henceforth referred to as the Mobile
EXTender.
 The MCK Communications Management Interface is henceforth referred to as the MI.

PBXgateway II System Administrator’s Guide 15
Chapter 1: Product Overview
This Chapter provides a Product Overview for the PBXgateway II, with ConneX features, including a
Product Feature List, Voice Compression vs. Bandwidth Requirements, Typical Installation Information, a
Management Interface (MI) Overview, and Diagnostic Information.

PBXgateway II System Administrator’s Guide 16
Introduction This Chapter provides a product overview of the following products:
 PBXgateway
 PBXgateway II
 EXTender 6000 for Branch Offices
 EXTender 4000 for IP
 EXTender 3000 for ISDN
 EXTender 1000 for PSTN
The information includes: basic functionality, connectivity, voice compression,
configuration, and diagnostics.
Product
Summary
The PBXgateway II, with ConneX features, is a multi-user telephony device enabling
remote teleworkers seamless connectivity and full functionality of the corporate Private
Branch Exchange (PBX). The PBXgateway II is referred as a “gateway ” because it is
the central receiving point for routing voice conversations from one or more locations to
the PBX. Teleworkers, usually working from an off-site location, can place a call
through the corporate PBX by simply dialing the number as if they were in the main
office.
Single Users
Single remote users can connect their digital phones through one of the following
devices:
 EXTender 4000 for IP
 EXTender 3000 for ISDN
 EXTender 1000 for PSTN (POTS)
 Mobile EXTender for cellular and analog telephones
Multiple-
Users
Remote offices with multiple users can be connected through one of the following
devices:
 EXTender6000, 8-user
 EXTender6000, 12-user
You can use 3 EXTender 6000 8-user devices, or 2 EXTender 6000 12-user devices to
support 24 remote users.
The single-user devices are commonly referred to as a “Remote unit” and the multi-user
devices are referred to as “Branch Office units”.
Compatible
Networks The PBXgateway, Remote units and Branch Office units are linked through a wide
variety of network devices (TA, FRAD, CSU/DSU) and network types (ISDN, IP, Frame
Relay, TI, Fractional T1, ATM).

PBXgateway II System Administrator’s Guide 17
Features
The PBXgateway II has the following features:
 Support for a wide variety of network termination equipment
 Support for 24 remote users (Multiple Remote Configuration)
 Supports RemoteConneX features when ADSI phones are used.
 Supports MobileConneX features when ADSI phones are used
 Mobile EXTender support for mobile and analog phones
 Configuration via the internet (HTML Configuration)
 Fax support on the 2nd B channel (CH2, for DEFINITY and Meridian protocols)
 Setup Wizard for configuring the units
 ISDN Call Suspend modes
Compatible Remote Units
The PBXgateway II is compatible with many different types of remote units, with each unit having different
network and user requirements. Complete installation and configuration information is provided with each
remote unit in the form of a “Quick Installation Guide” (QIG) or “User’s Guide”. Please consult the
appropriate document for information not contained in this manual.
What is the EXTender 4000 for IP?
The EXTender 4000 provides remote voice access to a corporate PBX for a single remote user. Remote
users can connect to the PBXgateway via a 10/100BaseT Ethernet connection using IP packet
transmission. Remote users’ phones will connect into the remote module via an RJ-45 phone jack, and
their phone traffic will be placed in IP packets and sent out to the LAN via a 10/100BaseT Ethernet
connection to the PBXgateway II.
What is the EXTender 3000 for ISDN?
The EXTender 3000 is a single user device that enables a remote user to have full access to the digital
telephone features and functions of the PBX. The EXTender 3000 enables a remote user to access a
PBX port via an ISDN BRI connection.
Note: The EXTender 3000 is supported on the DEFINITY and Meridian protocols only.
What is the Analog EXTender 1000 for PSTN?
The Analog EXTender 1000 is a single user device that enables a remote user to have full access to the
digital telephone features and functions of the PBX. The EXTender 1000 enables a remote user to
access a PBX port via a PSTN analog connection.
Note: The EXTender 1000 is supported on the DEFINITY protocol only.
What is the Mobile EXTender for Cellular and Analog Telephones?
The Mobile EXTender is a feature added to the PBXgateway II to support cellular and analog phones.
The Mobile EXTender enables remote users (Road Warriors) to access DEFINITY ECS and Meridian
PBX ports via a PSTN analog connection.

PBXgateway II System Administrator’s Guide 18
PBX EXTender and PBXgateway II Compatibility
The table below lists the version of firmware required by each remote unit to provide the users access to
the features of the PBX.
Remote Client Firmware Version
Comment
Branch Office EXTender
6000 Remote Unit
(includes 8 port and 12
port models)
1.2.2 Upgrade to 2.1 Use the v2.1.m6b file
from the PBXgateway II.
1.2.4 (Release 1 or 2) Upgrade to 2.1-use the v2.1.m6b file
from the PBXgateway II
2.1 Compatible-no action required
EXTender 3000 for ISDN All versions Compatible-no action require
Analog EXTender 1000 1.0 (running G.723
algorithm) Upgrade to G.729a
2.0 (running G.729a) Compatible-no action required
Types of Network Connections
The PBXgateway II is designed to connect over a wide variety of third party network devices using
various types of network connections:
 Synchronous-Serial connection (V.35, RS-530, RS-232)
 Asynchronous-Serial connection (RS-232)
 IP (10/100BaseT Ethernet)
 ISDN
 PSTN
Voice Transmission
At both the branch office and corporate sites, all voice and signaling information is placed into digital data
packets, which are then sent out over the data network. This data is transmitted digitally over the
connection as a series of “ones” and “zeroes”. The data packets are encapsulated within an MCK
Proprietary protocol called Remote Voice Protocol(RVP)
The most important consideration for packetizing voice is defining when each character begins.
Synchronous-vs Asynchronous Transmission
One way to do this is by providing a clock signal. At a precise time, the transmission starts. This is called
Synchronous (see page 24). In Asynchronous transmission, there is no clocking signal. The receiving
terminal knows what’s what because each character begins with a start bit and ends with a stop bit (see
page 25).
(VoIP)
The voice and signaling packets are sent using Internet Protocol (IP) over the packet-switched data
networks as opposed to using the traditional circuit-switched protocols. Voice packets get delivered to
the alternate device using the RVP. This protocol handles the timing and delivery of the packets. (See
page 26 for more information)

PBXgateway II System Administrator’s Guide 19
Connections vs. Remotes
Table 1:
Connection Type Remotes Supported
Type Maximum #
of Remotes
per Gateway
Model(s)
Protocols Connection type
RVP_Direct 2
6000 *RVP over HDLC Serial WAN Ports
RVP_IP 2 (12 user
units)
3 (8 user
units)
6000 *RVP_over_IP Ethernet (10/100BaseT)
RVP_IP 24
4000 *RVP_over_IP Ethernet (10/100BaseT)
RVP 24 3000 for ISDN RVP BRI
Dial-up 24 1000 for PSTN NA Analog
Dial-up 24
Mobile EXTender NA Analog
* Remote Voice Protocol
 (RVP), MCK Proprietary protocol.

PBXgateway II System Administrator’s Guide 20
Typical Installations
The PBXgateway II, with ConneX features, can be installed in a variety of different configurations
depending on available bandwidth, the type of third-party termination equipment, and the type of
EXTender installed at the remote location.
Figure 1: EXTender 6000 (RVP_Direct) Installation
Figure 2: EXTender 4000 & 6000 (RVP_IP) Installation