OreaTEL GT48 User manual

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GT48 VoIP Gateway
User Manual
V.2.1

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Table of Contents
CHAPTER 1 PRODUCT INTRODUCTION...........................................................................................................- 5 -
1.1 OVERVIEW ............................................................................................................................................................- 5-
1.2 FEATURES .............................................................................................................................................................- 5-
1.3 HARDWARE PLATFORM.........................................................................................................................................- 6-
1.3.1 Physical........................................................................................................................................................- 6 -
1.3.2 Technical Specifications...............................................................................................................................- 6 -
CHAPTER 2 MODULES AND INTERFACES..........................................................................................................- 8 -
2.1 MAIN CONSOLE MODULE......................................................................................................................................- 8-
2.1.1 FXO Port......................................................................................................................................................- 8 -
2.1.2 Ethernet Port................................................................................................................................................- 9 -
2.1.3 Console Port........................................................................................................................................................- 9 -
2.1.4 LED Definitions.................................................................................................................................................- 10 -
2.2 FXS LINE INTERFACE MODULE .......................................................................................................................... - 11 -
2.3 SWITCHING POWER SUPPLY MODULE .................................................................................................................- 12 -
CHAPTER 3 PREPARATION FOR INSTALLATION ...................................................................................- 14 -
3.1 SAFETY CHECK .........................................................................................................................................................- 14 -
3.2 INSTALLATION ENVIRONMENT............................................................................................................................- 14 -
3.2.1 Temperature/Humidity ...............................................................................................................................- 14 -
3.2.2 Dust Control and Air Flow.........................................................................................................................- 14 -
3.2.3 Interference and Lighting Hazard..............................................................................................................- 14 -
3.2.4 Installing GT48 Chassis .............................................................................................................................- 15 -
3.3 INSPECTING GT48 AND ITS ACCESSORIES............................................................................................................- 15 -
CHAPTER 4 INSTALLATION .................................................................................................................................- 16 -
4.1 TOOLS REQUIRED FOR INSTALLATION.................................................................................................................- 16 -
4.2 INSTALLING THE MAIN CONTROL MODULE ........................................................................................................- 16 -
4.3 INSTALLING THE FXS INTERFACE MODULE........................................................................................................- 16 -
4.4 INSTALLING THE POWER SUPPLY MODULE ......................................................................................................... - 16 -
4.5 INSTALLING GT48 ONTO A STANDARD SHELF ....................................................................................................- 17 -
4.6 INSTALLING CABLES ...........................................................................................................................................- 17 -
4.6.1 Connecting Console Port ...........................................................................................................................- 17 -
4.6.2 Connecting Ethernet Port...........................................................................................................................- 18 -

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4.6.3 Connecting FXS Cable ...............................................................................................................................- 20 -
4.7 CONNECTING POWER SUPPLY .............................................................................................................................- 20 -
4.8 FINAL CHECKS AFTER INSTALLATION .................................................................................................................- 21 -
CHAPTER FIVE FUNCTION DESCRIPTION.......................................................................................................- 22 -
5.1 REGISTRATION ....................................................................................................................................................- 22 -
5.2 SYSTEM CONFIGURATION ...................................................................................................................................- 23 -
5.3 NETWORK CONFIGURATION................................................................................................................................-24 -
5. 4MGCP CONFIGURATION .....................................................................................................................................- 26 -
5.5 SIP CONFIGURATION...........................................................................................................................................- 27 -
5.6 CONFIGURING 1ST/2ND CARD ................................................................................................................................-29 -
5.6.1 Configuring the Phone Number..................................................................................................................- 29 -
5.6.2 Call Status Information ..............................................................................................................................- 30 -
5.6.3 Line Configuration .....................................................................................................................................- 31 -
5.7 ADVANCED CONFIGURATION..............................................................................................................................- 33 -
5.7.1 Configuring the Digit Map.........................................................................................................................- 33 -
5.7.2 Routing Configuration................................................................................................................................- 34 -
5.7.3 Setting up the Feature Codes......................................................................................................................- 35 -
5.7.4 System Advanced Options......................................................................................................................- 40 -
5.7.5 Advanced FXO Options..........................................................................................................................- 42 -
5.7.6 Advanced FXS Options..............................................................................................................................- 43 -
5.7.7 Advanced IP Options ....................................................................................................................................- 44 -
5.7.8 Advanced SIP Options...................................................................................................................................- 45 -
5.8 LOG INFORMATION .............................................................................................................................................- 47 -
5.8.1 Resources Information..................................................................................................................................- 47 -
5.8.2 Call Status Information.................................................................................................................................- 47 -
5.8.3 Error Information.........................................................................................................................................- 48 -
5.8.4 Message Information....................................................................................................................................- 48 -
5.8.5 Startup Information ......................................................................................................................................- 49 -
5.9 SYSTEM TOOLS ...................................................................................................................................................- 50 -
5.9.1 Restore Factory Setting ................................................................................................................................- 50 -
5.9.1.1 Default System Parameter Settings ..........................................................................................................................- 50 -
5.9.1.2 Default Network Parameter Settings........................................................................................................................- 50 -
5.9.1.3 Default MGCP Settings.............................................................................................................................................- 51 -
5.9.1.4 Default SIP Settings..................................................................................................................................................- 51 -
5.9.1.5 Default FXS Settings................................................................................................................................................- 51 -
5.9.1.6 System Advanced Default Settings...........................................................................................................................- 52 -
5.9.1.7 Default FXO Settings...............................................................................................................................................- 52 -

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5.9.1.8 FXO Advanced Default Settings................................................................................................................................- 52 -
5.9.1.9 FXS Advanced Default Settings ................................................................................................................................- 53 -
5.9.1.10 Default IP Advanced Settings ...............................................................................................................................- 53 -
5.9.1.11 SIP Advanced Default Settings...............................................................................................................................- 53 -
5.9.2 Software Update............................................................................................................................................- 54 -
5.9.3 Change Password..........................................................................................................................................- 54 -
5.9.4 Restart Gateway ............................................................................................................................................- 55 -
5.10 EXIT ....................................................................................................................................................................- 55 -

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Chapter 1 Product Introduction
1.1 Overview
GT48 VoIP gateway is a product based on the advanced MicroXchange architecture. It is a multiple purpose,
modular VoIP gateway. GT48 is designed for carriers and enterprises for regular phone service, fax service and
PBX service. It can be used as a part of the cost effective IP PBX solutions.
GT48 supports many VoIP standard protocols and voice codec. It provides effective solutions to many technical
challenges that include echo cancellation, firewall, and billing. Compared to other products on the market, GT48
has the advantage of carrier reliability, flexible configuration, high voice quality, excellent protocol compatibility,
and low cost. Its high efficient hardware and software design and powerful DSP processing power guarantee the
GT48 capability of full load voice and signaling processing and IP packetization. Its redundant load sharing power
supplies and hot swappable modules further secures the GT48’s reliability.
GT48 can provide up to 48 FXS/FXO ports. It is also equipped with multiple 10/100M Ethernet interfaces. GT48
connects to regular telephones, faxes and PBXs through the FXS/FXO analog interfaces. It connects to IP
network through Ethernet interfaces. GT48 provides real-time and high quality IP-based voice services.
1.2 Features
GT48 has the following features:
¾Flexible Configuration
GT48 uses compact modular slot chassis design. Users can configure the GT48 with interface cards of different
types and capacities.
¾Carrier Reliability and Serviceability
GT48 hardware is designed to reach the high MBTF (Mean Time Between Failure). To satisfy the carrier
reliability requirement for voice gateways, GT48 has the option of load sharing power module. Should one power
module fail to function, the other power module resumes the full power function. Every hardware module is hot
swappable for in-service maintenance.
¾Support FTP file transfer and Telnet remote configuration
¾Protocols and Voice Codec
GT48 supports MGCP、SIP、RTP、TFTP、HTTP、SNMP、DHCP、and STUN protocols. It also supports G.711、
G.729A、G.723.1 codec, G.168 echo cancellation, RFC2833 DTMF relay, and T.38 fax relay.
¾Supported Devices
GT48 supports analog telephones, faxes, and PBX devices.
¾Interoperability

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GT48 has completed many Soft Switch and gateway interoperability tests worldwide.
1.3 Hardware Platform
1.3.1 Physical
Figure 1-1 GT48 Front View
①One hot swappable main control module. The main module supports three
10/100M Ethernet ports for IP network, one console port (CON), and one FXO
port.
②&③Two hot swappable slots that can be configured with different interface cards
( see table 1-1)
Table 1-1 GT48 Interface Slot Configuration Options
Interface Type Slot②Slot③DS0s
FXS12 12
FXS24 24
FXS12 FXS24 36
Analog
FXS24 FXS24 48
Figure 1-2 GT48 Rear View
①Two Fan Modules.
②&③Two hot swappable power supply modules for redundancy.
1.3.2 Technical Specifications

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Table 1-2 GT48 Specification
Specification
Internal Memory 32MB/64MB/128MB (Standard 64MB)
Flash Memory 8MB/16MB (Standard 16MB)
Talk Battery –24 voltage
Ringing Voltage 60V RMS
REN Equivalence 5 for short loop ( 1000 feet), 3 for long loop (5000 feet)
Loop Current 21 mA
Max Line Length 1500 m
Off-hook Detection Loop Start and Ground Start
Dialing DTMF
Input Voltage 100～240 Voltage
Input Current 0.7Amp(110 Voltage)/0.35Amp(220 Voltage)
Current Frequency 47～63 HZ
Power Consumption 75Watt(Max)
Operation Temperature 0～40°C
Non Operation Temperature –25～70°C
Operation Humidity 5～95%(Non Condensed)
Noise 30 DB(Max)
Size (H×L×W) 4.4×44×44 cm
Weight 7 kg
Weight ( including package) 9 kg

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Chapter 2 Modules and Interfaces
GT48 is designed based on modular architecture. Its modules and interfaces are followed:
2.1 Main Console Module
GT48 Main Console Module uses advanced framework and technology. Its main features include: high
performance processors for management and signaling processing and DSP sub module for voice processing.
The Main Console Module provides necessary interfaces to connect to peripheral devices and internal interface
modules. It can supports up to 48 analog line/trunk ports.
Figure 2-1 GT48 Main Console Module Physical View
①Main Console Module Thumb Screw ②FXO Port
③Ethernet Port (0) ④Ethernet Port(1)
⑤Ethernet Port (2) ⑥Console Port (CON)
⑦Power LED ⑧Status LED
⑨Alarm LED ⑩Main Console Module Thumb Screw
GT48 modules are hot swappable for easy service and maintenance. For example: users can pull the main
console module out for service by pulling the main console module thumb screw indicated by ①and ⑩.
Note：The main console module can be secured by turning the screw clockwise. Turn screws the other way to
pull the main console module out.
2.1.1 FXO Port
There is on FXO port of RJ45 on the GT48 main console module.Table2-1 shows the wiring scheme for its
matting connectors.

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Table2-1 FXO Port Connector Pin Assignment
RJ45 Connector Pin Number 1 2 3 4 5 6 7 8
Description NC NC NC TIP RING NC NC NC
RJ45 Wiring Scheme (8 pin) 4 5
RJ11 Wiring Scheme (4 pin) 2 3
The FXO port on the GT48 can be used for PSTN interconnection as a redundant path besides IP for voice calls.
Both RJ45 connector and RJ11 connector can be used for FXO port. When the RJ25 connector is used, pin 4
and pin 5 carry out the analog signal pair. When the RJ 11 connector is used, pin 2 and pin 3 carry out the analog
signal pair.
2.1.2 Ethernet Port
There are three 10/100M Ethernet ports on the GT48 main console module with RJ45 connector type and status
LED. Table 2-2 shows the pin assignment of those Ethernet connectors and LED status definitions.
Table2-2 Ethernet Port Pin Assignment and Status LED Definitions
Pin LED
1 2 3 6 Yellow Green
TX+ TX- RX+ RX- Connected Live
¾Ethernet Port (0) ：reserved for future use.
¾Ethernet Port (1) ：for console/management/maintenance use.
¾Ethernet Port (2) ：VoIP broadband network interface. This port is used for all the VoIP activities that
include SIP and MGCP signaling protocol and RTP packets transmission. This port can also be used
for control/management/maintenance.
Note：If possible, we suggest customers use the Ethernet port 1 for software upgrade, device configuration, and
management operations and use the Ethernet port 2 for VoIP protocol and data transmissions.
2.1.3 Console Port
GT48 supports configuration through a console port (CON) of RJ45 connector type. Table2-3 shows the
connector interface scheme of RJ45 to DB9 and DB25.

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Table2-3 Console Port Pin Assignment of RJ45 to DB9 and DB25
RJ45 Connector Pin No. 1 2 3 4 5 6 7 8
Pin Description NC NC TXD GND GND RXD NC NC
DB9 Connector Pin No. 2 5 3
DB25 Connector Pin No. 3 7 2
The console port is used for local management and testing. Computers can be connected to GT48 by linking the
RS232 port to GT48 console port. GT48 uses three wires on the console port: one TXD (send), one RXD
(receive), and one GND (ground).
GT48 is shipped with a standard RJ45 to DB9 cable.
Table2-4 Console Port Specification
Description
Connector Type RJ45
Port Number 1
Interface Type RS232
Baud Rate 115200
Data Bits 8
Parity Check No
Stop Bit 1
Flow Control No
2.1.4 LED Definitions
There are three LED indicators on the front of the GT48 main console module: power, alarm, and status.Table2-5
show the LED types and definitions.

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Table2-5 Main Console Module LED Definitions
Green Main power supply is on
PWR Power
Indicator Off Main power supply is off
Off System is locked in a non functional state
Flashing Green Normal
Red System is in the start up mode, not ready for
operation
STU Status
Indicator
Flashing Red System is in the diagnostic mode with limited
operation capability
Green Clear of all alarms
Flashing Red New alarm condition from an unknown source
ALM Alarm
Indicator Red Alarm with identified source
2.2 FXS Line Interface Module
Figure 2-2 FXS Interface Module Physical View
GT48 FXS interface module provides the interface to analog phones and PBX. Each GT48 FXS interface module
provides up to 24 ports. Each GT48 can have up to two FXS interface modules, 48 analog ports. FXS interface
module provides 50 pin CHAMP connector. Table2-6 shows the scheme of the 50 pin CHAMP connector. GT48
supports two configurations of the FXS interface module：12 port FXS module (FXS-12) and 24 port FXS module
(FXS-24) .On the FXS-12 interface module, the pins from 13 to 24 are not used.

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Table2-6 Pin Assignment of the CHAMP Connector on the FXS Interface Module
Pin Description Pin
1 RING1 TIP1 26
2 RING2 TIP2 27
3 RING3 TIP3 28
4 RING4 TIP4 29
5 RING5 TIP5 30
6 RING6 TIP6 31
7 RING7 TIP7 32
8 RING8 TIP8 33
9 RING9 TIP9 34
10 RING10 TIP10 35
11 RING11 TIP11 36
12 RING12 TIP12 37
13 RING13 TIP13 38
14 RING14 TIP14 39
15 RING15 TIP15 40
16 RING16 TIP16 41
17 RING17 TIP17 42
18 RING18 TIP18 43
19 RING19 TIP19 44
20 RING20 TIP20 45
21 RING21 TIP21 46
22 RING22 TIP22 47
23 RING23 TIP23 48
24 RING24 TIP24 49
25 NC NC 50
2.3 Switching Power Supply Module

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Figure 2-3 Switching Power Supply Module Physical Diagram
The high performance GT48 switching power supply module is specifically designed with AC input and multiple
DC output functions. A single module provides the ample power for a full loaded GT48 system. As an option,
uses can select dual redundant power supply modules. The power module supports the load sharing operation
mode.
The GT48 switching power supply module inputs 100v to 240 v AC voltage and output several DC voltages：
¾-70V for ringing and off-hook
¾-24V for talking battery
¾+5V for ringing SLIC
¾3.3V for logic devices
GT48 switch power supply module is hot swappable. GT48 can maintain normal operation when a user adds,
deletes, and exchanges a power module for maintenance in a live system.Table2-7 shows the pin assignments
for DC outputs.
Table2-7 Pin Assignments for the DC Outputs
Pin No. 2 4 6 8 10
Description -70V/0.5A -24V/1.5A 5V/1A 3.3V/5A
Description GND GND GND GND GND
Pin No. 1 3 5 7 9

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Chapter 3 Preparation for Installation
To avoid any body injury and device damage, please read this chapter carefully before the installation.
3.1 Safety Check
The following safety items needs to be strictly followed when GT48 is installed and used. Please make sure the
installation site is away from wet and heat.
¾Follow electricity safety rules
¾Please let the experienced or trained operator to install and maintain GT48
¾Wear static discharge wrist strap
¾Ensure the electric ground of installed equipment
¾Properly connect the power cable to GT48
¾Do not unplug the power cable when in use
¾UPS should be used to power GT48
Note：Please read carefully the labeled content when installing GT48 and strictly following the operation
procedure.
3.2 Installation Environment
3.2.1 Temperature/Humidity
The GT48 installation room must maintain normal temperature and humidity.
If the room temperature exceeds the specified maximum temperature, it will shorten the live of the electrical
insulation material. If the room humidity exceeds the specified humidity, GT48 may experience electrical static
shock and shrinkage of electric insulation material in the metal package. It may also cause metal corrosion. All
these will drastically shorten the life span of the GT48. It is strongly recommended that user control the
environmental temperature between 0～40ºC and humidity between 5%～95% (none condensing).
3.2.2 Dust Control and Air Flow
Dust falls on the GT48 might cause intermittent failure in electrical connections. It may cause long term damage
to GT48. It will cause equipment failure and shorten equipment life span. Therefore, GT48 needs to have ample
air flow in front of the GT48 air intake and outtake for proper heat exhaust.
3.2.3 Interference and Lighting Hazard
GT48 may experience various types of EMI hazards in operation and its performance may be impacted. To
reduce those hazards to the GT48, it is suggested that：
¾Do not install GT48 close to high power wireless equipment, RADAR transmission site, and high
frequency high electric current devices.
¾Ensure that power source to be electrical interference free.

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¾Ensure the proper grounding of the GT48 and implement the lighting protection device.
3.2.4 Installing GT48 Chassis
When installing the GT48 chassis please secure the GT48 with screws on a shelf with proper grounding and well
air flowed environment.
3.3 Inspecting GT48 and its accessories
After the installation preparation is completed, the shipping package can be opened to examine all the items in
the package. The list of items for the GT48 is shown in Table 3-1.
Table3-1 GT48 Basic Configuration and Accessories
Model Number Qty Description
MX-CHS01-V02-00 1
GT48 Chassis：one slot for main control module, two
slots for the interface modules, and two fans
MX-APU70-V02-00 1 75 Watt Power Supply Module
MX-CBL00-0002 1 3 meter power cable
MX-CBL00-0003 1 3 meter console port cable
SFC00-0004 4 Screws
MX-CBL00-0012 2 Analog user line cable
Note：It is suggested that users carefully examine the content of the shipping package according to the sales
contract. If there is any question or problem, please contact our customer service department
(Email:[email protected])

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Chapter 4 Installation
4.1 Tools Required for Installation
¾Screw driver
¾Static discharge wrist strip
¾Ethernet and console port cables
¾Power cable
¾Telephone cable
¾Wiring HUB, phone handset, fax or, PBX
¾Terminals (a PC running terminal program can be used)
¾Universal electric meter
4.2 Installing the Main Control Module
All GT48 modules are hot-swappable. Installation and maintenance is very easy. Just Please follow the
procedure below:
Step 1: Turn the two thumb screws of the blank face plate covering the slot housing the Main Control Module
counter clock-wise. Store the blank face plate away for later use.
Step 2: Slide GT48 Main Control Module along the guide rail into the chassis.
Step 3: Snap the Main Control Module on to the backplane in the chassis.
Step 4: Turn the two thumb screws clock-wise to secure the Main Control Module until they stops.
4.3 Installing the FXS Interface Module
Please follow the procedure below:
Step 1: Turn the two thumb screws of the blank face plate covering the slot housing the FXS Interface Module
counter clock-wise. Store the blank face plate away for later use.
Step 2: Slide the FXS Interface Module along the guide rail into the chassis.
Step 3: Snap the FXS Interface Module on to the backplane in the chassis.
Step 4: Turn the two thumb screws clock-wise to secure the FXS Interface Module until they stops.
4.4 Installing the Power Supply Module
Please follow the procedure when install the Power Supply Module.
Step 1: Turn the two thumb screws of the blank face plate covering the slot housing Power Supply Module
counter clock-wise. Store the blank face plate away for later use.

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Step 2: Slide the Power Supply Module along the guide rail into the chassis.
Step 3: Snap the Power Supply Module on to the backplane in the chassis.
Step 4: Turn the two thumb screws clock-wise to secure the Main Control Module until they stops.
4.5 Installing GT48 onto a Standard Shelf
GT48 is designed to fit into a standard 19 inch shelf with standard 1U form factor. Its physical dimension is
4.4cm high x 43.8cm wide x 42.5cm deep.
Installation procedure is as follows：
Step 1: Place a GT48 into an empty slot on a 19 inch shelf and identify the left and right hand.
Step 2: Use the screws in the shipping package to secure the GT48 onto the shelf, as illustrated in Figure 4-1.
Figure 4 - 1 Installing GT48 onto a 19 inch shelf
Step 3: The shelf and the hands will hold the GT48 in place.
Note:
¾Ensure GT48 is horizontal.
¾Ensure there is ample airflow space around GT48.
¾Ensure enough space between two GT48s when multiple GT48s are installed.
4.6 Installing Cables
4.6.1 Connecting Console Port
There is a Console Port on GT48 for local configuration, management and diagnostics. Through the Console Port
cable, a PC can directly connect to it.
The Console Port cable in the shipping package has a RJ45 connector on one end for GT48 and DB9 on the
other end for a PC.

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Console Port cable installation procedure is as follows:
Step 1: Choose a terminal (a PC for example).
Step 2: Turn off the power of the terminal, and then use the RS232 cable to connect the GT48 Console Port to
the terminal.
4.6.2 Connecting Ethernet Port
There are three 10/100 BaseT Ethernet ports with RJ45 connector type on a GT48. Each Ethernet port is
equipped with LED status display. Ethernet port transmits voice packet as well as management, maintenance
and control information.
The Ethernet Cable needs to be carefully made to ensure IP data and voice quality. The following is the
Ethernet cable making scheme:
Step 1: A user can use a proper cable peeling cutter to peel away 3cm skin of a CAT-5 cable. What is left is
shown in Figure 4-2.
Figure 4 - 2
Step 2: Twisted pairs. Currently the most commonly used standard wiring scheme is EIA/TIA T568B shown in
Figure 4-3. In the wiring scheme, pin 1 and 2 are a pair, pin 3 and 6 are a pair, pin 4 and 5 are a pair and
pin 7 and 8 are a pair. According to the Fig. 4-3, twisted pairs line up with colors (1: white orange，2:
orange，3: white green，4:blue，5: white blue，6:green，7: white brown，8: brown). Please pay special
attention that the green and white green are separated by a pair of blue wires. It is a common mistake to
put green and white green close together, which will result in interference and therefore lower
transmission efficiency.

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Figure 4 - 3 T568B wire pairing scheme
Step 3: After lining up wires to the correct pin positions, trim all the twisted pairs with a cable cutter, leaving 15mm
leads exposed. Then follow Figure 4-4 by inserting wires to their corresponding pin position in the plastic
shell of RJ45 connector. Pin 1 will house white orange wire, etc.
Figure 4 - 4
Step 4: After wires have been properly inserted into RJ45 connector; a cramping tool can secure the wires to the
connector and make connections to the metal pins as shown in Figure 4-5.

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Figure 4 - 5
Since straight cable is used, the connector for the other end of the cable can be made the same way using RJ45
connector.
Note: Please use shielded CAT-5 cable when option is available for better signal transmission quality.
After the Ethernet cable is ready, one end of the cable can connect to GT48 and the other end connect to a HUB.
Please check the Ethernet LED status: yellow means connecting in progress and green means in operation.
4.6.3 Connecting FXS Cable
GT48 has an FXS interface that connects to analog phones.
Connect one end of the FXS cable to the GT48 FXS interface, and connect the other end to phones, faxes, or
PBXs, as shown in Figure 4-6.
Figure 4 - 6 Connecting to FXS cable
Note: When connecting the cable makes sure you connect the right ends.
4.7 Connecting Power Supply
GT48 uses high efficient switching power supply module. Single module can power up the unit with full load. The
second power supply module can also be installed to provide redundancy. The switching power supply module
has the following characteristics: