AT&T DEFINITY 7100 series Manual de usuario descargar pdf (Pagina 83)

PORT CIRCUIT PACKS

DID Trunk (TN436B) — non-US Installations

The TN436B provides eight ports that independently connect to a

public network. Each port is an interface between a two-wire ana-

log PBX line from a CO and the four-wire TDM network in the sys-

tem. The TN436B has administrable timers.

DID Trunk (TN459B) — non-US Installations

The TN459B provides eight ports for immediate-start or wink-start

DID trunks. Each port is an interface between a two-wire analog

PBX line from a CO and the four-wire TDM network in the system.

The TN459B has administrable timers and a backward busy circuit

that complies with signaling requirements. A TN495B has the fol-

lowing signal leads on each port: T, R.

Direct Inward Dial (DID) Trunk TN753

Provides eight ports used for immediate-start and wink-start DID

trunks. Each port on a TN753 has transmit and receive leads.

DIOD Trunk (TN429) — non-US Installations

The TN429 provides eight ports for DIOD trunks. Each port has the

following signal leads: T, R.

DID Trunk (TN2139) — non-US Installations

The TN2139 provides eight analog DID trunk ports for analog DID

signaling. Each port has tip and ring signal leads. The TN2139 has

zero dB loss digital transmission.

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AT&T DEFINITY 7100 series Manual de usuario Pagina 83