Lucent Technologies 7820-0802-003 manual E1 lines as SS7 data trunks

Signaling System 7 (SS7)

Configuring an SS7 signaling gateway

admin> set line-interface enabled = yes

admin> set line-interface signaling-mode = ss7-data-trunk

admin> set line-interface incoming-call-handling = inter- nal-processing

admin> set line-interface channel-config 24 channel-usage = switched

admin> write

T1/{ shelf-1 slot-1 7 } written

E1 lines as SS7 data trunks

Configuring the E1 SS7 data trunks is very similar to configuring T1 data trunks. To configure E1 lines for SS7, you must set the following parameters in an E1 profile, shown with sample settings:

[in E1/{ shelf-1 slot-10 1 }:line-interface] signaling-mode = ss7-data-trunk incoming-call-handling = internal-processing

[in E1/{ shelf-1 slot-10 1 }:line-interface:channel-config[17]] channel-usage = switched-channel]

Parameter

Signaling-Mode

Incoming-Call-Handling

Channel-Usage

Usage for SS7 data trunks

For an SS7 data trunk, which carries no signaling, this parameter can be set to either of the following values. The setting registers the line with the signaling gateway and allows the gateway to take control of the line and its calls.

ss7-data-trunkcauses the TAOS unit to provide clear 64Kbps SS7 data trunk support. If any of the PSTN switches you are using is a 1AESS switch, which uses robbed-bit signaling, this setting can sometimes cause that switch to receive fluctuating A/B bit status. This condition might ultimately force the line out of service, unless you disable robbed-bit signaling on the 1AESS switch.

ss7-robbed-bitcauses the TAOS unit to send a steady A/B bit status on the SS7 data trunk, which eliminates the need to disable robbed-bit signaling on the 1AESS switch.

Specifies how the TAOS unit processes incoming calls on this line. For SS7 data trunks, the parameter must be set to internal-processingin this release. The ss7-gateway-processingsetting for passing incoming call requests to an external signaling gateway is currently not supported.

In the TAOS unit, the channel-config index begins with 1 (not 0), so E1 lines typically use channel 17 for signaling. For SS7 data trunks, change the default Channel-Usage setting for channel 17 from d-channelto switched-channel.

18-10 APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide