
PORT CIRCUIT PACKS
Tie Trunk TN760D
Has four ports used for Type 1 or Type 5 four-wire E&M lead signal-
ing tie trunks. These trunks can be automatic, immediate-start,
wink-start, and delay-dial. The TN760D serves the release link
trunks required for Centralized Attendant Service.
Tie Trunk (TN2140) — non-US Installations
The TN2140 provides four ports for four-wire E&M lead signaling tie
trunks. The TN2140 has continuous and dicontinuous E&M
signaling, administrable A-law and µ-law companding, zero dB digi-
tal loss, and standard Type 1 and Type 5 signaling.
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