AT&T DEFINITY 7100 series Bedienungsanleitung PDF herunterladen (Seite 76)

PORT CIRCUIT PACKS

Analog Line (TN467) — non-US Installations

The TN467 provides eight ports for an interface between analog

voice terminals and the TDM bus. The TN467 has administrable

A-law companding, µ-law companding and complex input

impedance. This circuit pack provides secondary lightning

protection.

Analog Line (TN468B) — non-US Installations

The TN468B provides 16 analog line ports. Each port has tip and

ring signal leads. The TN468B is defaulted to A-law companding

and allows a down-link message to override the default and choose

µ-law companding (depending on how it is administered). The

TN468B has administrable ring patterns and secondary lightning

protection.

Analog Line TN742, TN769, TN746, TN746B,

and TN479

These circuit packs provide the interface between analog voice ter-

minals and the system. The TN742 and TN769 each has 8 ports.

The TN746, TN746B, and TN479 each has 16 ports. Each port has

the following signal leads: tip (T) and ring (R).

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AT&T DEFINITY 7100 series Bedienungsanleitung Seite 76