ATT DEFINITY Communications System Generic 3 Pocket Reference Instructions Manual

PORT CIRCUIT PACKS
CO Trunk (TN447) — non-US Installations
The TN447 provides eight analog CO trunk ports. Each port has tip
and ring signal leads and connects to a two-wire analog line. The
TN447 has the following attributes:
lGround-start trunk signaling
l50 Hz periodic pulse metering (PPM) detection and
counting
lAdministrable timers
CO Trunk (TN465 and TN465B) —
non-US Installations
The TN465 provides eight analog CO trunk ports and has the fol-
lowing attributes:
Loop-start trunk signaling
16 kHz...

PORT CIRCUIT PACKS
CO Trunk (TN2138) — non-US Installations
The TN2138 provides eight analog CO trunk ports. Each port has
tip and ring signal leads. The TN2138 has 50Hz, 12kHz, and 16kHz
PPM.
CO Trunk (TN2147) — non-US Installations
The TN2147 provides eight analog CO trunk ports. Each port has
tip and ring signal leads.
The TN2147 uses four (one for each pair of ports) dual subscriber
line audio processing circuits (DSLACs) that can be administered to
meet the following transmission and DC signaling...

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...

PORT CIRCUIT PACKS
DID Trunk (TN2146) — non-US Installations
The TN2146 provides eight analog DID trunk ports. Each port has
tip and ring signal leads. The TN2146 uses four (one for each pair
of ports) dual subscriber line audio processing circuits (DSLACs)
that can be administered to meet trunk transmission characteristics.
The DSLACs can be set to either a resistive or complex balance
impedance in the voice or AC talk path on the trunk interfaces. The
DSLACs convert analog signals to digital signals...

PORT CIRCUIT PACKS
Digital Service (DS1) Converter TN574
(G3rV2)
The TN574 in a port network terminates communication carried
across a T1 facility from another port network. The TN574 can ter-
minate from one to four full-duplex links. The TN574s installed in
two port networks allow the communication distance to be 100
miles (station-to-station) between them.
DS1 Interface TN767B
Allows DS1 and ISDN-PRI signaling to be remoted over DS1 facili-
ties. It also allows the ISDN-PRI signaling to be carried on...

PORT CIRCUIT PACKS
DS1 Interface Universal TN464
The TN464 acts as a DS1 interface and an ISDN-PRI interface. It
can be installed in any port slot in the system.
Hybrid Line TN762 or TN762B
Has eight ports that can be connected only to AT&T 7300 series,
multiappearance hybrid analog and digital voice terminals. A
TN762B has the following leads:
l
lVT and VR, which are used for analog voice
CT, CR, P-, and P+, which are used for digital signals
that control terminals
ISDN Line TN556
Has 12 ports that can...

PORT CIRCUIT PACKS
Pooled Modem TN758
Provides two conversion resources ports (such as a trunk data
module) for switched connections between digital data endpoints
(data modules) and analog data endpoints (modems).
Speech Synthesizer (TN433) —
non-US Installations
The TN433 provides four ports that retrieve fixed messages for
Leave Word Calling, Automatic Wakeup, and Visually Impaired
Attendant Console features. Examples of the the messages are
good morning, time-of-day, and extension number. Each of...

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) —...

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...

INTERFACE CIRCUIT PACKS
INTERFACE CIRCUIT PACKS
Processor Interface TN765 (G3sV2, G3vsV2,
and G3iV2)
Provides four data links to interface to the 3B2 Message Server
Adjunct (MSA), DCS, ISDN, and AUDIX service. Terminates BX.25
and ISDN (LAPD) protocols. The multicarrier cabinet supports two
Processor Interface circuit packs that provide a total of eight links.
A single carrier system supports one such circuit pack and provides
four links to the processor.
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