AT&T DEFINITY 7100 series Bedienungsanleitung PDF herunterladen (Seite 69)

CONTROL CIRCUIT PACKS

Packet Data Line TN553 (G3rV2)

In conjunction with a TN726B circuit pack, provides connections to

system ports.

Packet Gateway TN577 (G3rV2)

TN577 is an X.25 protocol interface between the system and

adjuncts. For example, the TN577 serves as the interface between

AUDIX and the system.

Packet Interface TN1655 (G3rV2)

Provides the communication path between the SPE and the LAN

bus in the PPN. This path is used by the EPNs and the CSS, via

EI circuit packs in the PPN, to communicate with the processor

(RISC).

The TN1655 also provides LAPD terminations of communication

links across the LAN bus that go to the RISC. The following major

links are terminated:

●

ISDN-BRI and ISDN-PRI signaling links

Expansion archangel links that connect the RISC to the

expansion archangels on EI circuit packs in each PN

Center stage control network links that connect the RISC

with the switch node interface circuit packs in the CSS

DCS links (Station Message Detail Recording (SMDR)

and adjuncts such as AUDIX)

Firmware downloading

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AT&T DEFINITY 7100 series Bedienungsanleitung Seite 69