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 PPM detection and counting
Administrable timers
The TN465B also provides battery reversed signaling.
CO Trunk TN747 or TN747B or C
Provides eight ports for loop-start or ground-start central office
(CO), foreign exchange (FX) and Wide Area Telecommunications
(WATS) trunks. A port can also be connected to a PagePac paging
system. Supports the Abandoned Call Search feature in automatic
call distribution (ACD) applications.
 l
 l
 l
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							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 requirements:
l
lLoop-start signaling
Earth-calling and loop-calling guarded clearing signaling
The DSLACs convert analog signals to digital signals and digital sig-
nals to analog signals in order to interface the analog CO trunks to
the system’s digital TDM bus.
Data Line (EIA) TN726
Provides eight serial asynchronous Electronics Industries Associa-
tion (EIA) ports with modem interfaces that can be connected
through ADUs to EIA ports (such as RS-232C) on data terminal
equipment (DTE). The TN726B uses Mode 2 or Mode 3 data
transfer protocol. The DTE can be adjuncts and peripheral equip-
ment, such as: data terminals, printers, host computers, PCs,
graphics and facsimile systems, and call detail acquisition and pro-
cessing systems. The TN726B works in conjunction with a TN553
Packet Data Line circuit pack.
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							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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							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 and vice-versa to
match the analog DID trunks to the system’s digital TDM bus.
Companding in the TN2146 firmware is programmed to the default
A-law; however, the firmware can be administered to select µ-law
companding.
Digital Line TN754 or TN754B
Provides eight asynchronous digital communications protocol (DCP)
ports that can be connected to the following equipment: 7400
series digital voice terminals, attendant consoles, 510D personal
terminals, MT 515 business communications terminals, and data
modules.
Digital Line (TN2136) — non-US Installations
The TN2136 provides eight ports for connecting the system to the
following DCP endpoints: data adapter modules and digital tele-
phone models one and two. Each port can be connected to a two-
wire digital line. The TN2136 has administrable A-law andµ-law
companding.
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							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 any of
the 24 trunk ports between the TDM bus and the DS1 facility. It
performs robbed-bit signaling using CO, TIE, DID, and OPS signal-
ing protocol in any remaining ports.
DS1 Tie Trunk TN722B
Provides connections to a 1.544 Mbps DS1 facility as 24, indepen-
dent trunks. Each trunk transmits data of 64 kbps. The TN722B
provides three types of digital tie trunk interface:
l
l
lVoice-grade DS1
Alternate Voice/Data (AVD) DS1 tie trunks
Digital-Multiplexed Interface (DMI)
It also provides bit-oriented signaling in the following trunks:
automatic, immediate-start, delay-dial, and release-link.
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							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 be connected to ISDN-BRI terminals. Each
port operates at 192 kbps and has two B-channels and one
D-channel. It allows eight ports to provide interface links for
ASAI/CVS applications with the Incoming Call Management feature
and requires a Packet Control circuit pack (TN778).
Multi-button Electronic Telephone (MET)
Line TN735
The TN735 has four ports that connect to MET sets. Each port has
the following signal leads:
l
lT and R, which handle analog voice
BT, BR, LT and LR, which handle digital signals that
control terminals
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							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 the
ports has touch-tone detection. The TN433 has administrable µ-law
companding and A-law companding.
Speech Synthesizer (TN457) —
non-US Installations
The TN457 provides four ports that retrieve fixed UK-accent spoken
messages for Leave Word Calling, Automatic Wakeup, and Visually
Impaired Attendant Console features. Examples of the the mes-
sages are: good morning, time-of-day, and extension number.
Each of the ports has touch-tone detection. The TN457 has admin-
istrable µ-law companding and A-law companding.
Speech Synthesizer TN725 or TN725B
Has four ports that send voice message information to voice termi-
nals to activate Leave Word Calling, Automatic Wakeup, Voice
Message Retrieval, and Do Not Disturb features. The ports can
detect tones.
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							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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							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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							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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