Signaling System 7 (SS7)
System requirements for SS7 operations
System requirements for SS7 operations
A TAOS unit configured for SS7 in communication with an SS7 signaling gateway is a service switching point (SSP). To operate in this capacity, the TAOS unit must have the following equipment and licenses:
•SS7 software license, either for ASGCP or IPDC
•Sufficient T1, T3, or E1 trunks
•Sufficient modem or Hybrid Access (HDLC) cards (or both) to terminate data calls
•One or more Ethernet cards (recommended to offload the shelf controller)
If the system is a MAX TNT unit and will operate as a MultiVoice gateway in an SS7 environment, a MultiVoice software license must also be enabled and one or more MultiDSP cards must be installed to enable the system to terminate voice calls. For details about MultiVoice, see the MultiVoice for MAX TNT Configuration Guide.
TAOS unit as terminator of data calls in an SS7 network
With the ASGCP license, TAOS units can decrease congestion on the Public Switched Telephone Network (PSTN) caused by users connecting to the Internet. An example of a TAOS unit being used for this purpose is shown in Figure
Figure 18-1. TAOS terminating data calls in an SS7 network
Data path without ASGCP
PRI
ISP A
ISP B
ISP C
Egress CO | Tandem CO | Ingress CO |
|
switch | switch | switch |
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| PSTN |
| SS7 Network |
| |
| IMT data | ||
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| ||
|
| trunk |
|
signaling gateway | ASGCP |
| |
|
|
| |
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| TCP/IP | TAOS |
| Frame Relay, |
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| ATM, or IP |
|
|
Data path with ASGCP
The TAOS unit is connected to the entry (ingress) central office (CO) switch via intermachine trunks (IMTs) and to a signaling gateway by means of
APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide |
