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TGM550 Telephony Gateway Module
The TGM550 Telephony Gateway Module (Figure 41), also known as the TGM550 Gateway Module, has two analog
telephone ports, two analog trunk ports, and a serial console port.
The TGM550 enables routers to provide VoIP services to telephones
and trunks that do not directly support VoIP by translating voice
and signaling data between VoIP and the system used by the telephones
and trunks.
Figure 41: TGM550 Telephony Gateway Module
The TGM550 provides the following key features:
- Voice
- VoIP Media Gateway services.
- Two analog telephone (LINE) ports to support
two analog telephones or incoming analog direct inward dialing (DID)
trunks with either wink start or immediate start. An analog relay
supports emergency transfer relay (ETR).
- Two analog trunk (TRUNK) ports to support loop
start, ground start, centralized automatic message accounting (CAMA),
and direct inward and outward dialing (DIOD) (for Japan only) trunks.
- Survivability features for continuous voice services.
- Call center capabilities.
- Provisioning
- Avaya Communication Manager (CM) media server management
- Extensive alarm and troubleshooting features
- Survivability
- Media Gateway Controller (MGC) automatic switchover, migration,
and survivability features
- Modem backup connection to the MGC
- Dynamic call admission control (CAC) for WAN interfaces
- Management: One serial port for console access over an
RJ-45 connector cable
 |
Note: The RJ-45 console
cable and DB-9 adapter supplied with the TGM550 are different from
the RJ-45 cable and DB-9 adapter supplied with the Services Router for
console connections to the Services Router. You cannot use the RJ-45
cable and DB-9 adapter supplied with the Services Router for console
connections to the TGM550.
|
Table 36 lists the maximum number
of media servers, telephones, TIMs, and so on that are supported by
the TGM550 installed on a J4350 or J6350 Services Router.
Table 36: TGM550 Maximum Media Gateway Capacities
|
Hardware or Feature
|
TGM550 Maximum Capacity
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Additional Information
|
|
TGM550s that can be controlled by an Avaya S8500 or S8700 Media
Server
|
250
|
This number also applies if a combination of Avaya G700 Media
Gateways, G250 Media Gateways, and G350 Media Gateways are controlled
by the same media server.
|
|
TGM550s that can be controlled by an Avaya S8400 Media Server
|
5
|
This number also applies if a combination of Avaya G700 Media
Gateways, G250 Media Gateways, and G350 Media Gateways are controlled
by the same media server.
|
|
TGM550s that can be controlled by an Avaya S8300 Media Server
|
49
|
This capacity is 50 if a combination of Avaya G700 Media Gateways,
G250 Media Gateways, and G350 Media Gateways are controlled by the
same media server.
The S8300 must reside in a G700 or G350 media gateway. Therefore,
the maximum of 50 H.248 gateways supported by the S8300 means that
only 49 of the 50 can be TGM550s.
|
|
Media servers that can be registered as Media Gateway Controllers
(MGCs) on a TGM550
|
4
|
If an MGC becomes unavailable, the TGM550 uses the next MGC
on the list. The built-in SLS module can be considered as a fifth
MGC, although its functionality is limited than that of a full-scale
media server.
|
|
Fixed analog line ports
|
2
|
—
|
|
Fixed analog trunk ports
|
2
|
—
|
|
TIM510 E1/T1 media modules
|
2
|
Up to two TIM510s can be installed in any of the slots on the Services Router.
|
|
TIM5521 BRI media modules
|
2
|
Up to two TIM521s (with 4 BRI trunk ports each) can be installed
in any of the slots on the Services Router.
|
|
Digital signal processors (DSPs)
|
1 (up to 80 channels)
|
The DSP supports 80 channels for calls using voice codec
sets with 20-millisecond-or-higher packet sizes.
For calls with 10-millisecond-or-lower packet sizes, the DSP
supports 40 channels.
For TTY, fax, or modem over IP calls, the DSP supports 40 channels.
|
|
Busy Hour Call Completion Rate (BHCC)
|
800
|
—
|
|
Total of IP and analog telephones that can be connected to a
TGM550 and TIMs
|
70 (J4350)
100 (J6350)
|
Maximum includes a combination of analog and IP telephones
|
|
Touch-tone recognition (TTR)
|
32
|
Receivers
|
|
Tone generation
|
As much as necessary for all TDM calls.
|
—
|
|
Announcements (VAL)
|
16 playback channels for playing announcements, one of which
can be used for recording
20 minutes for G711-quality stored announcements and music-on-hold.
256 maximum announcements stored
|
 |
Caution: Some capacities may change. For the most recent list, see the
Avaya manual System Capacities Table for Avaya Communication
Manager on Avaya Media Servers.
|
For pinouts of the TGM550 RJ-45 console connector, see TGM550 Console Port Pinouts. For pinouts of cable connectors
for the TGM550 analog ports, see TGM550 RJ-11 Connector Pinout for Analog Ports.
To install or remove an Avaya VoIP module, see Replacing a PIM.
TGM550 LEDs indicate link status and activity. Table 37 describes the meaning of the LEDs.
Table 37: LEDs for TGM550 Gateway Module
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Label
|
Color
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State
|
Description
|
|
ALM
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Red
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On steadily
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Alarm. A failure in the TGM550 requires monitoring or maintenance.
|
|
ACT
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Yellow
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On steadily
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Active. The TGM550 is online with network traffic.
|
|
ASB
|
Green
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On steadily
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Alternate software bank. The software is not running from the
selected boot bank.
|
|
ETR
|
Green
|
On steadily
|
Emergency transfer relay (ETR) feature is active.
|
For more information about the TGM550, see the Avaya manual Hardware Description and Reference for Avaya Communication Manager.
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