AT&T DEFINITY 7100 series Manual de usuario descargar pdf (Pagina 88)

PORT CIRCUIT PACKS

Tie Trunk (TN437) — non-US Installations

The TN437 provides four ports for four-wire E&M lead signaling tie

trunks. The TN437 has selectable trunk type, administrable timers,

A-law companding, selectable standard reliability Type 5 signaling

or E&M Type 5 signaling.

Tie Trunk (TN439) — non-US Installations

The TN439 provides four ports for two-wire tie trunks with loop

disconnect signaling. The TN439 has administrable A-law com-

panding, µ-law companding and timers.

Tie Trunk (TN458) — non-US Installations

The TN458 provides four ports for four-wire E&M lead signaling tie

trunks. The TN458 has administrable A-law companding,µ-law

companding and timers. The TN458 can be administered on each

port for connection to Type 1 E&M standard and compatible (unpro-

tected), Type 1 E&M compatible (protected), and Type 5 simplex.

Tie Trunk (TN497) — non-US Installations

The TN497 provides four ports for two-wire tie trunks with loop

disconnect signaling. Each port can be administered for: A-law

companding and µ-law companding, and timers, translatore giun-

zione uscente (TGU), which means “outgoing tie,” translatore giun-

zione entrante (TGE), which means “incoming tie,” and translatore

giunzione interno (TGI), which means “internal tie.”

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AT&T DEFINITY 7100 series Manual de usuario Pagina 88