Excalibur ISX 5312 User manual

ExcaliburTM ISX 5312/5314
T-1 Multiplexer
Installation and Operation
15D30A-1/B 1/98
Milgo Solutions, Inc.
1619 N. Harrison Parkway
P.O. Box 407044
Fort Lauderdale, FL 33340-7044
Internet: http://www.milgo.com

ii
Warranty
The period of warranty for the Excalibur ISX 5312/5314 T-1 Multiplexer starts on the
date of sale to the original end user and extends one year for software and one year for
hardware. Refer to Milgo Solutions, Inc. Limited Warranty for details.
Milgo Solutions requires a Return Material Authorization (RMA) prior to the return of
any equipment under the provisions of the warranty. Please contact your authorized
reseller or the nearest Milgo support center for details.
Second Edition, January, 1998
Excalibur and CMS are trademarks of Milgo Solutions, Inc. All other logos and product names are trademarks or registered
trademarks of their respective companies.
©1999 Milgo Solutions, Inc.
All rights reserved. No part of this work covered by the copyright hereon may be reproduced or copied in any form or by
any means — graphic, electronic, or mechanical, including photocopying, recording, taping, or information and retrieval systems
— without written permission of the publisher. Any software furnished under a license may be used or copied only in accordance
with the terms of such license.
Milgo Solutions, Inc. reserves the right to modify or revise all or part of this document without notice and shall not be
responsible for any loss, cost, or damage, including consequential damage, caused by reliance on these materials.
Printed in U.S.A.

iii
Milgo Solutions
Customer Information Contacts
CORPORATE HEADQUARTERS
Milgo Solutions, Inc.
1619 North Harrison Parkway
Sunrise, Florida 33323-2802, U.S.A.
Tel: [phone]
Fax: [phone]
Internet: http://www.milgo.com
Call Milgo's Corporate Headquarters if you
need the following information:
Press For:
1 Billing or invoice information
2 Orders, product delivery or availability, and
repairs
3 Sales
4 Field service
5 Training
6 Employee benefits and information
7 Corporate quality
8 Mailing or street addresses
For technical support, please contact your
supplier/distributor with details of the issue.
MILGO SERVICE CONTRACT CUSTOMERS:
For customers with Milgo Service Contracts or
service requirements, contact the following offices:
AMERICAS
U.S. and U.S. Multinational
Milgo Solutions, Inc.
1619 North Harrison Parkway
Sunrise, Florida 33323-2802
Tel: [phone]
Fax: [phone]
EUROPE/MIDDLE EAST/AFRICA
Milgo Solutions, Ltd
Landata House, Station Road
Hook, Hampshire, RG279JF, England
Tel: [phone]
Fax: [phone]
Milgo Solutions SA
Parc du Colombier
18 Rue Jules Saulnier
93206 Saint-Denis
Cedex, France
Tel: [phone]
Fax: [phone]
Milgo Solutions BV
Poortweg 14
2612 PA Delft
The Netherlands
Tel: [phone]
Fax: [phone]
ASIA/PACIFIC
Contact your Milgo affiliate support center. (See
next page for addresses and phone/fax numbers.)
MILGO AFFILIATE SUPPORT CENTERS:
AMERICAS Region
Milgo Solutions, Inc.
1619 North Harrison Parkway
Sunrise, Florida 33323-2802, U.S.A.
Tel: [phone]
Fax: [phone]
email: [email protected]
EUROPE/MIDDLE EAST/AFRICA Region
Milgo Solutions, Ltd.
Landata House, Station Road
Hook, Hampshire, RG279JF, England
Tel: [phone]
Fax: [phone]
email: [e-mail]
Internet: www.milgo.com/emea
Bulletin Board Service: [phone] (PSTN)
[phone]/3/4 (ISDN)

iv
MILGO AFFILIATE SUPPORT CENTERS:
ASIA/PACIFIC Region
Milgo Solutions (Hong Kong), Ltd.
Sun House 6th Floor
181 Des Voeux Road, Central
Hong Kong
Tel: [phone]
Fax: [phone]
Milgo Solutions (Hong Kong) supports:
•China (southern provinces)
•Japan
•Korea
•Hong Kong
•Macau
•Taiwan
Milgo Solutions (Singapore) Pte Ltd.
26 Ayer Rajah Crescent, #04-06
Ayer Rajah Industrial Estate
Singapore 139944
Tel: [phone]
Fax: [phone]
Milgo Solutions (Singapore) supports:
•Brunei
•Indonesia
•Malaysia
•Philippines
•Singapore
•Thailand
•Australia
•New Zealand
•Rest of Indochina
Cambodia
Laos
Myanmar
Vietnam
Milgo Solutions (Beijing), Inc.
Room 20659
Beijing Friendship Hotel
Beiing 100873
Tel: [phone]
Fax: [phone]
Milgo Solutions (Beijing) supports:
•China (northern provinces)

v
About This Manual
Manual Description
The Excalibur ISX 5312/5314 T-1 Installation and Operation manual provides the
information you need to properly install, operate, and troubleshoot this unit. It assumes
you are familiar with basic data communications principles and terminology.
This manual consists of the following chapters:
•Chapter 1, Introduction contains an overview of the ISX 5312/5314's
capabilities and descriptions of all standard features.
•Chapter 2, Installation shows you how to place the unit, make the necessary
cable connections, and provide AC power.
•Chapter 3, Using the Front Panel describes how to use the front panel buttons
and LCD screen to move through the menus and enter commands. It explains
how to enter T7 and IP addresses and how to establish password protection. It
also explains how to establish the user identifier and password required for
access from Telnet.
•Chapter 4, Defining Operating Parameters explains how to configure the
ISX 5312/5314 so that it performs properly in your particular network
environment. This section also includes descriptions of each operating parameter
and recommended settings for typical applications.
•Chapter 5, Online Operation describes the procedures you can perform while
the ISX 5312/5314 is transmitting and receiving data. These procedures include
monitoring current operating status, viewing local error statistics from 24-hour
registers, and viewing stored alarms.
•Chapter 6, Troubleshooting explains how to use the ISX 5312/5314's built-in
diagnostic tests to isolate the source of malfunctions in your network.
•Appendix A, Technical Specifications
•Appendix B, Cable Diagrams
• Appendix C, Regulatory Information

About This Manual
vi
Conventions
The following typographical conventions are used in this manual:
• References to labeled parts of a device, such as buttons and connectors, are
shown in boldface. For example:
The DS1A connector is located on the ISX 5312/5314’s rear panel.
• References to text that appears on the control panel LCD screen are shown in
this font. For example:
Press the button beneath Confg to enter the Configuration menu.
• In the front panel illustrations that accompany step-by-step instructions, the gray
shading indicates which button to press. For example:
1. Press the button beneath Local.
1 2 3 4
Escape Top
T
E x c a l I S X 5 3 1 4 D T 1 S A
L o c a l A d d r R T N
<
>
•Boldface text denotes text you need to enter.
• Angle brackets (< >) indicate that you choose the text to enter based on the
description inside the brackets. Do not type the angle brackets when entering the
command. Example: if command syntax is ISX 5314> C<desired baud rate>,
you enter 2400.
•[ENTER] indicates that you must press a special keyboard key such as Enter or
Control.
• Slash character (/) separates menu and option names in instructions. Example:
Local/Confg identifies the Configuration option under the Local menu.
Caution: Cautions precede information that may result in equipment damage or major
failure if the given procedures are not followed.

vii
Table of Contents
Chapter 1 - Introduction
Overview .......................................................................................................................................................... 1-1
Operating Environment.................................................................................................................................... 1-2
Models.............................................................................................................................................................. 1-4
Standalone Model...................................................................................................................................... 1-4
Central Site Model..................................................................................................................................... 1-5
Standard Features............................................................................................................................................. 1-6
AT&T ASDS Compatibility...................................................................................................................... 1-6
Menu-Driven Front Panel Display ............................................................................................................ 1-6
Password Protection .................................................................................................................................. 1-6
Integral DSU/CSU..................................................................................................................................... 1-7
Protection Switching ................................................................................................................................. 1-7
Drop-and-Insert Capability........................................................................................................................ 1-7
T7 via Dial Modems.................................................................................................................................. 1-7
Dial-In Access for Front Panel Emulation ................................................................................................ 1-8
Alarm Reporting........................................................................................................................................ 1-8
ESF Diagnostic Monitoring....................................................................................................................... 1-9
Built-In Diagnostic Tests........................................................................................................................... 1-9
Downloadable Software ............................................................................................................................ 1-9
CMS T7 Compatibility ............................................................................................................................ 1-10
Integral SNMP Agent .............................................................................................................................. 1-10
Telnet Client Support .............................................................................................................................. 1-11
Front Panel Emulation............................................................................................................................. 1-12
Management Interfaces ........................................................................................................................... 1-13
External Dial Backup............................................................................................................................... 1-14
Chapter 2 - Installation
Overview .......................................................................................................................................................... 2-1
Unit Placement................................................................................................................................................. 2-2
Setting DTE Port Interface (Central Site Model Only) ................................................................................... 2-2
Setting Switches (Central Site Model Only).................................................................................................... 2-4
Cable Connections ........................................................................................................................................... 2-5
Connecting to the DTEs ............................................................................................................................ 2-7
Connecting to the T-1 Line or to External Equipment.............................................................................. 2-8
Connecting to External Dial Backup Device............................................................................................. 2-9
Connecting to NMI Port for T7 Network Management ............................................................................ 2-9
Connecting to NMI Port for PPP/SLIP Network Management............................................................... 2-10
Connecting to NMI Port for Front Panel Controller or Console Port Applications................................ 2-13
Connecting to the Ethernet 10BaseT Connector ..................................................................................... 2-13
Connecting to a Dial Modem .................................................................................................................. 2-14
Connecting to an External Alarm Device (Central Site Model Only) .................................................... 2-14
DMM Connector (Central Site Model Only) .......................................................................................... 2-15

Table of Contents
viii
AC Power Connection ................................................................................................................................... 2-15
Verifying the Ethernet Link Connection ....................................................................................................... 2-16
Chapter 3 - Using the Front Panel
Introduction ..................................................................................................................................................... 3-1
Front Panel Components ................................................................................................................................. 3-1
What You Will See First ................................................................................................................................. 3-2
Moving Through the Menus ............................................................................................................................ 3-2
Alarm Display.................................................................................................................................................. 3-3
Entering the T7 Address .................................................................................................................................. 3-3
Entering IP Addresses ..................................................................................................................................... 3-5
Entering the Unit’s Local IP Address ....................................................................................................... 3-5
Entering the Gateway Address.................................................................................................................. 3-7
Entering the Subnet Mask ......................................................................................................................... 3-7
Enabling Traps .......................................................................................................................................... 3-7
Establishing Password Protection.................................................................................................................... 3-8
Locking and Unlocking Front Panel Functions ........................................................................................ 3-8
Changing the Password........................................................................................................................... 3-10
Establishing the Telnet Logon Sequence ...................................................................................................... 3-11
Entering the Telnet Security Submenu ................................................................................................... 3-12
Entering the User Identifier .................................................................................................................... 3-13
Entering the User Password .................................................................................................................... 3-16
Session Timeout...................................................................................................................................... 3-16
Using Console Port Interface......................................................................................................................... 3-17
Enabling Console Port Interface ............................................................................................................. 3-17
Autobaud ................................................................................................................................................. 3-17
Logging In............................................................................................................................................... 3-18
Display Screens....................................................................................................................................... 3-18
Terminal Key Functions.......................................................................................................................... 3-19
Logging Off............................................................................................................................................. 3-20
Chapter 4 - Defining Operating Parameters
Overview.......................................................................................................................................................... 4-1
Entering the Configuration Menu.................................................................................................................... 4-1
Defining Individual Parameters....................................................................................................................... 4-3
DSU Parameters .............................................................................................................................................. 4-5
Location..................................................................................................................................................... 4-6
Transmit Clock.......................................................................................................................................... 4-6
System Clock ............................................................................................................................................ 4-9
Beeper ..................................................................................................................................................... 4-10
Alarm LED.............................................................................................................................................. 4-11
Network Loop Enable ............................................................................................................................. 4-11
Clock Tolerance ...................................................................................................................................... 4-12
Tolerance Limit....................................................................................................................................... 4-12
Busy Signal Bits...................................................................................................................................... 4-12
Access Protection Capability .................................................................................................................. 4-12

Table of Contents
ix
Hot Spare ................................................................................................................................................. 4-18
Network Management System ....................................................................................................................... 4-23
Protocol.................................................................................................................................................... 4-23
Speed ....................................................................................................................................................... 4-24
NTS.......................................................................................................................................................... 4-24
T7 Via Dial Modems ............................................................................................................................... 4-24
Remote T7 Via a DS0 Channel ............................................................................................................... 4-41
Port Parameters .............................................................................................................................................. 4-43
DS0 .......................................................................................................................................................... 4-44
Rate .......................................................................................................................................................... 4-44
Remote T7 ............................................................................................................................................... 4-44
Connection............................................................................................................................................... 4-45
RTS Control............................................................................................................................................. 4-50
DTR Control ............................................................................................................................................ 4-50
DSR Control ............................................................................................................................................ 4-51
Transmit Clock ........................................................................................................................................ 4-51
T7 Mode .................................................................................................................................................. 4-52
Ring Signal Indicator............................................................................................................................... 4-53
T-1 Line Parameters....................................................................................................................................... 4-53
Frame ....................................................................................................................................................... 4-53
Code......................................................................................................................................................... 4-53
Line Build-Out......................................................................................................................................... 4-54
Channel.................................................................................................................................................... 4-54
Alias......................................................................................................................................................... 4-59
Daisy Chain ............................................................................................................................................. 4-59
Alarms ............................................................................................................................................................ 4-62
Red Alarm................................................................................................................................................ 4-63
Yellow Alarm .......................................................................................................................................... 4-63
Blue Alarm .............................................................................................................................................. 4-63
Controlled Slip Alarm ............................................................................................................................. 4-63
ES Alarm ................................................................................................................................................. 4-64
BPV Alarm .............................................................................................................................................. 4-64
LOS Alarm .............................................................................................................................................. 4-64
Reference Clock Changed Alarm............................................................................................................ 4-64
DTE Failed Alarm ................................................................................................................................... 4-64
Clock Tolerance Failed Alarm ................................................................................................................ 4-65
Switched to Dial Backup Alarm.............................................................................................................. 4-65
Switched to Dedicated Alarm.................................................................................................................. 4-65
Dial Backup Connection Failed Alarm ................................................................................................... 4-65
APC Switch to Protection Line Alarm .................................................................................................... 4-65
Hot Spare Switch Alarm.......................................................................................................................... 4-65
Network Loops ........................................................................................................................................ 4-66
DSU Alarm Parameters ........................................................................................................................... 4-66
T-1 Line Alarm Parameters ..................................................................................................................... 4-69
Factory Submenu ........................................................................................................................................... 4-73
User Strap Submenu....................................................................................................................................... 4-73
Reset Submenu............................................................................................................................................... 4-74
New Software Submenu................................................................................................................................. 4-75

Table of Contents
x
Chapter 5 - Online Operation
Overview.......................................................................................................................................................... 5-1
Entering the Status Menu ................................................................................................................................ 5-1
DSU Status....................................................................................................................................................... 5-3
NMS Status ............................................................................................................................................... 5-8
APC Status .............................................................................................................................................. 5-12
Hot Spare Status...................................................................................................................................... 5-16
Port Status...................................................................................................................................................... 5-17
T-1 Line Status .............................................................................................................................................. 5-20
Error Statistics ............................................................................................................................................... 5-25
Local and Telco Registers....................................................................................................................... 5-25
Network Receive Register ...................................................................................................................... 5-27
Viewing Error Statistics.......................................................................................................................... 5-28
Alarm Status .................................................................................................................................................. 5-31
Diagnostic Tests ............................................................................................................................................ 5-35
Using External Dial Backup Feature............................................................................................................. 5-40
Enabling Dial Backup Mode................................................................................................................... 5-40
Configuring Operating Parameters ......................................................................................................... 5-43
Clock Source During Dial Backup.......................................................................................................... 5-47
Automatic Dial Backup Failures............................................................................................................. 5-48
Initiating a Dial Backup Connection Manually ...................................................................................... 5-49
Disconnecting a Dial Backup Connection Manually.............................................................................. 5-49
Dial Backup Mode Diagnostics .............................................................................................................. 5-50
Chapter 6 - Troubleshooting
Overview.......................................................................................................................................................... 6-1
Initial Checks................................................................................................................................................... 6-1
Management Paths During Network Outages ................................................................................................. 6-1
T-1 Line Pattern Test....................................................................................................................................... 6-2
DTE Pattern Test ............................................................................................................................................. 6-3
Digital Loop Test............................................................................................................................................. 6-4
V.54 Digital Loop Test.................................................................................................................................... 6-4
Remote PN127 Digital Loop Test ................................................................................................................... 6-5
Local Line Loop .............................................................................................................................................. 6-5
Local Channel Loop ........................................................................................................................................ 6-6
Bundle Loop .................................................................................................................................................... 6-6
Telco Loops ..................................................................................................................................................... 6-6
Line Loopback .......................................................................................................................................... 6-6
Payload Loopback..................................................................................................................................... 6-7
Activating the Tests......................................................................................................................................... 6-7
DTE Tests.................................................................................................................................................. 6-8
T-1 Line Tests ......................................................................................................................................... 6-11
RTN Function ................................................................................................................................................ 6-17
Testing Alarm Relays (Central Site Model Only)......................................................................................... 6-17

xi
Important Safety Instructions
1. Never install telephone wiring during a lightning storm.
2. Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations.
3. Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at
the network interface.
4. Use caution when installing or modifying telephone lines.
5. Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote
risk of electrical shock from lightning.
6. Do not use the telephone to report a gas leak in the vicinity of the leak.
Caution: To ensure compliance with government regulations, do not install or operate this
product until you have read the information contained in Appendix C.

Excalibur ISX 5314 T-1 Multiplexer - Standalone Model

1-1
Chapter 1
Introduction
Overview
The ExcaliburTM Integrated Services Express (ISX) 5312/5314 multiplexer connects
high-speed bridges, routers, and other Data Terminal Equipment (DTE). It provides
economical access to high-speed public/private T-1/FT1 and Frame Relay services,
while avoiding the complexity of a full-featured multiplexer. The unit has a built-in
Data Service Unit (DSU)/Channel Service Unit (CSU), allowing direct connection to the
T-1 line or Frame Relay service and eliminating the need for expensive external
equipment. Models are available with one or two long-haul network interfaces.
The Excalibur ISX 5312 provides two V.35 DTE ports, and the Excalibur ISX 5314
provides four V.35 DTE ports, which allows you to run more data applications on one
unit. The DTE ports each support N by 56 or N by 64 Kbps applications, providing
maximum carrier compatibility. The ISX 5312/5314 can interconnect to the Excalibur
ISX 5010 multiplexer or to other vendors’ T-1 interfaces.
For even more comprehensive network control, the Excalibur ISX 5312/5314’s integral
MIB-II-compliant SNMP agent provides a standards-based management interface. It
allows you to manage your complete network via SNMP from either a Communications
Management Series (CMSTM) 400 or generic SNMP manager.
The ISX 5312/5314 provides an asynchronous PPP (Point-to-Point Protocol) or SLIP
(Serial Line Internet Protocol) SNMP interface and an Ethernet (10BaseT) interface,
which provides a direct connection to the LAN. With a direct connection, you save the
expense of dedicating an expensive router port or providing an additional LAN server to
route your SNMP traffic. You can also select Milgo’s proprietary management protocol
for management from a CMS 400 T7 manager.
A CMS 400 system provides a custom SNMP application with a new sophisticated GUI
(Graphical User Interface). The SNMP application can also run under HP OpenView for
Windows and UNIX, and Tivoli TME 10 NetView for AIX. The application makes
ISX 5312/5314 configuration and operation quick and intuitive.
The ISX 5312/5314 provides full Telnet client support. This feature allows service
personnel to access a specific ISX 5312/5314 for configuration or diagnostic purposes,
using commonly available software running on a minimal platform. Additionally, Milgo
offers an optional Windows-based program that provides basic configuration capability
by emulating the ISX 5312/5314’s front panel.

Excalibur ISX 5312/5314 T-1 Multiplexer Installation and Operation
1-2
Operating Environment
The ISX 5312/5314 provides one or two long-haul network interfaces to full or fractional
T-1 links, or to Frame Relay services. It performs the time slot interchange (TSI)
function, which enables it to connect a DS0 channel from one T-1 interface to the other
T-1 interface.
Access to management capabilities is provided via an NMI port or via an Ethernet
(10Base-T) port. The ports are located on the ISX 5312/5314’s rear panel. The NMI
port is an asynchronous interface that provides access for SNMP, T7, Front Panel
Controller Application for Windows, or Telnet management. The SNMP agent can be
connected to via an asynchronous external router, a terminal server, a Milgo INX-NTS,
or a CMS 802X. The CMS 400 T7 manager can be connected to via an EDM, a Milgo
NMS 802X, or a Milgo CMS 802X. The Front Panel Controller Application for
Windows can be connected to directly from a PC serial port, or via a dial connection, a
terminal server, an INX-NTS, a NMS 802X, or a CMS 802X. The Telnet agent can be
connected to via a terminal server, an INX-NTS, or a CMS 802X. The Ethernet
(10Base-T) port provides a direct connection to the LAN, providing access for SNMP,
Telnet, and Front Panel Controller Application for Windows management.
The DTE ports each support N x 56 Kbps and N x 64 Kbps, where N = 1 to 24.
Figures 1-1 through 1-4 show typical Excalibur ISX 5312/5314 applications.
ISX 5312/5314
LAN Bridge/
Router
ISX 5010
Subrate
Multiplexer
Nx56/64
Kbps
T-1
Network
Nx56/64
Kbps
SNMP
Manager
T-1 Line
APC T-1 Line
T-1 Line
LAN LAN
Nx56/64
Kbps Nx56/64 Kbps
SNMP
Ethernet
Port Connection
ISX 5312/5314
ISX 5010
Subrate
Multiplexer
LAN Bridge/
Router
SNMP
Ethernet
Port Connection
Figure 1-1. ISX 5312/5314 with Two Network Interfaces and SNMP via a Direct
Ethernet Connection to the LAN

Introduction
1-3
ISX 5312/5314
LAN Bridge/
Router
ISX 5010
Subrate
Multiplexer
Nx56/64
Kbps
T-1
Network
Nx56/64
Kbps
SNMP
Manager
T-1 Line T-1 Line
PBX
T-1 Line
LAN
OR
LAN
LAN
OR
LAN
PPP/SLIP PPP/SLIP
Nx56/64
Kbps Nx56/64 Kbps
NMI NMI
ISX 5312/5314
ISX 5010
Subrate
Multiplexer
LAN Bridge/
Router
Figure 1-2. ISX 5312/5314 with Two Network Interfaces and SNMP via an
External Router
ISX 5312/5314
Nx56/64 Kbps
LAN Bridge/Router
Nx56/64 Kbps
Fractional
T-1
Network
Nx56/64 Kbps
Nx56/64 Kbps
Nx56/64 Kbps
EDM
CMS 400
Video Video
CMS T7
NMI
T-1 LINE
T-1 LINE
T-1 LINE
ISX 5312/5314
ISX 5312/5314
LAN Bridge/Router
Figure 1-3. ISX 5312/5314 with One Network Interface and T7 Management

Excalibur ISX 5312/5314 T-1 Multiplexer Installation and Operation
1-4
ISX 5312
Router
Corporate
Account
ISX 5312
Router
Corporate
Account
ISX 5314
ISX 5314
ISP HQ
ISX 5312 ISX 5312ISX 5312
Router Router
ISP POP
Frame
Relay
Internet
T-1 or
Frame
Relay
Corporate Account
Figure 1-4. ISX 5312/5314 Internet Service Provider Application
Models
The Excalibur ISX 5312 and Excalibur ISX 5314 come in a variety of models to suit
your needs. Models can be customized as follows:
•Standalone or high-density central site (the ISX 5312 is available only as a
standalone model)
•One or two DS1 long-haul network interfaces
Standalone Model
The standalone Excalibur ISX 5312/5314 (see photo facing page 1-1) is housed in a 3" x
8" x 12" (7.6 cm x 20.3 cm x 30.5 cm) plastic housing. The housing consists of a top
and bottom half, fastened together with two screws. The front and rear panels slide
vertically into the bottom half of the housing and are held in place by the top half. The
unit can be placed on any flat surface or it can be mounted in a standard 19-inch rack
(using an optional kit).
The unit's front panel contains an LCD information screen, two LED indicators, and
eight pushbuttons. The rear panel contains the interface connectors used to attach to the
DTEs, T-1 line(s), and other network components. The unit is powered by an external
power supply.

Introduction
1-5
Central Site Model
The central site Excalibur ISX 5314 consists of a printed circuit (p.c.) card and a
transition board (rear panel) that are designed for installation in the high-density
Excalibur Card Carrier (Figure 1-5) or ISX 5010 chassis (Figure 1-6).
The Excalibur Card Carrier can house up to 16 p.c. cards in a space just 10” (25 cm) high
by 17” (43 cm) wide. Up to six card carriers can be installed in a single 6-foot rack,
providing housing for up to 96 ISX 5314 central site units.
The Excalibur Card Carrier comes with a master control panel that provides single-point
control for all units in the rack. The control panel has eleven buttons and a 7-line by 32-
character display that let you select any installed unit. Once you select a unit, you can
control it in the same manner as the standalone model.
The ISX 5010 chassis is available in 3-, 6-, and 16-slot models. ISX 5314 units housed
in an ISX 5010 chassis can be controlled using an ASCII terminal connected to the
console port (NMI) on the unit’s transition board.
OE
SE
ES
OE
Ecali ur
Figure 1-5. Excalibur Card Carrier
Access Multiplexer ISX 5010
Figure 1-6. ISX 5010 6-Slot Chassis

Excalibur ISX 5312/5314 T-1 Multiplexer Installation and Operation
1-6
Standard Features
The Excalibur ISX 5312/5314 comes with a full complement of standard features, as
described in the following sections.
AT&T ASDS Compatibility
The ISX 5312/5314 is compatible with AT&T Publication 62411 for both SF (Super
Frame) and ESF (Extended Super Frame) formats. The ISX 5312/5314 supports all ESF
diagnostics per AT&T 54016 and ANSI T1.403, and supports AMI (Alternate Mark
Inversion), AMIB7 (Alternate Mark Inversion with Bit 7 Stuffing), AMIZS (Alternate
Mark Inversion with Zero Suppression), or B8ZS (Bipolar with Eight Zero Substitution)
line codes. Independently selectable, alternate, and contiguous DS0 placement is
supported, ensuring carrier compatibility. DS0 channels can be assigned to a particular
T-1 line. This feature allows you to quickly and easily reroute data to bypass a failed
T-1 link.
Menu-Driven Front Panel Display
The Excalibur ISX 5312/5314 has a menu-driven front panel display that makes
monitoring, configuring, and testing the ISX 5312/5314 quick and easy. The two-line
LCD screen guides you through the various operating procedures by displaying menu
prompts on the top line and selectable options on the bottom line. To select an option,
simply press the button beneath it. Figure 1-7 shows a typical menu display in which
you are prompted to select the source of timing signals for the ISX 5312/5314's transmit
clock.
1 23 4
Escape Top
L
D S U T x C lo c k = D T E 1
I n t r n D T E 1 D T E 2 D T E 3 >
<
>
Figure 1-7. Typical Menu Display
Password Protection
The Excalibur ISX 5312/5314 provides a password protection feature to prevent users
from accessing certain front panel functions. This feature enables you to lock out either
or both of the following functions from users who do not enter the proper password:
configuration and diagnostic testing. The password can be any three-character
alphanumeric code.

Introduction
1-7
Integral DSU/CSU
The ISX 5312/5314 has an integral DSU/CSU, which allows direct connection to the T-1
line and allows the carrier to access performance register information for monitoring
purposes. This feature eliminates the need for an external access device and minimizes
space requirements. For units with two T-1 line interfaces, one DSU/CSU can be used
for protection switching or the drop and insert function.
Protection Switching
DS0 channels can be assigned to a particular T-1 link and automatically switched to a
backup link in the event the primary link fails. This feature is available only for units
with two T-1 line interfaces. The ISX 5312/5314 provides two methods of protection
switching. Both can be enabled or disabled from the front panel.
• Access Protection Capability (APC) - Accunet’s T1.5 APC service function
provides the automatic transfer between two Accunet T1.5 access facilities when
one T-1 line fails. The criteria required for the transfer are defined in AT&T
Technical Reference 54017A1.
• Hot Spare - The ISX 5312/5314 provides the automatic transfer to a spare T-1 line
when the primary T-1 line fails, or from the spare line to the primary line when the
primary line is in good state. The criteria required for the transfer are Red, Blue,
and Yellow alarm conditions as defined in AT&T Technical Reference 54016.
Drop-and-Insert Capability
Drop-and-insert capability at the DS0 level allows you to connect a T-1 PBX or other T-
1 device with underutilized bandwidth to the ISX 5312/5314. This feature eliminates the
need for a separate T-1 circuit to support the PBX voice application or other data
applications.
T7 via Dial Modems
The ISX 5312/5314 provides a T7 path via dial modems and a Public Switched
Telephone Network (PSTN) line. You can use Milgo’s ALM 3226 dial modem or any
dial modem that supports Hayes AT operation. The modem link can be established
automatically, manually, or in response to CMS network management commands.
When set for automatic operation, the ISX 5312/5314 automatically initiates calls in
response to user-selectable criteria (Red, Blue, and Yellow alarms). With manual
operation, calls can be initiated by pressing the proper buttons on the ISX 5312/5314’s
front panel or the CMS console.

Excalibur ISX 5312/5314 T-1 Multiplexer Installation and Operation
1-8
Dial-In Access for Front Panel Emulation
The ISX 5312/5314 provides dial-in access via a dial modem and a Public Switched
Telephone Network (PSTN) line. You can use a Milgo dial modem or a generic modem
that supports Hayes AT operation. The modem must be set for Auto-Answer. From the
ISX 5312/5314’s front panel, the Protocol parameter in the NMS submenu must be set to
None or Ethernet. When communication is established via the modem link, front panel
emulation can be initiated using Milgo’s optional Front Panel Controller Application for
Windows.
The dial-in access feature allows you to use the entire T-1 bandwidth for data and still
have control and management of remote units via the modem link. You can also use the
modem to provide a backup command data path to a remote ISX 5312/5314 as shown in
Figure 1-8.
NMI
Port
NMI
Port
Modem
PSTN
NMS Backup CommandPath
Ethernet Ethernet
NMS PrimaryCommandPath
T-1
Network
ISX5312/5314 ISX5312/5314
LAN LAN
Modem
Figure 1-8. Dial Modem Providing a Backup Command Data Path to a Remote
ISX 5312/5314
Alarm Reporting
To alert you to potential problems in the network, the ISX 5312/5314 reports a wide
variety of alarm conditions. The conditions are simultaneously reported and displayed
on the ISX 5312/5314's front panel. You can select the time interval before a T-1 line
alarm is reported, and you can independently enable or disable each DSU and T-1 line
alarm. You can also set the ISX 5312/5314 to sound a beeper when it detects an alarm
condition. Alarm conditions are also reported to the T7 manager or to SNMP manager
as traps (if the network is so equipped). The ISX 5312/5314 stores the reported alarms
in memory.