Lucent Technologies DEFINITY Enterprise Communications Server Release 8.2 System Description Manual

							DEFINITY Enterprise Communications Server Release 8.2
System Description  555-233-200  Issue 1
April 2000
Cabinets, Carriers, and Circuit Packs 
141 Circuit Packs and Related Hardware 
TN497 Tie Trunk for Italy
The TN553 has 12 ports that can connect through a cross-connect field to a TN726B 
circuit pack and provides software-administrable connections between the Switch 
Processing Element (SPE) and system access ports. Inside the system, the TN553 
connects to the packet bus and converts mode-2 protocol to mode-3 protocol connecting 
the TN726B to the TDM bus for asynchronous Electronic Industries Association (EIA) 
connections to adjuncts.
TN553  Packet Data Line 
The TN553 has 12 ports that can connect through a cross-connect field to a TN726B 
circuit pack and provides software-administrable connections between the Switch 
Processing Element (SPE) and system access ports. Inside the system, the TN553 
connects to the packet bus and converts mode-2 protocol to mode-3 protocol connecting 
the TN726B to the TDM bus for asynchronous Electronic Industries Association (EIA) 
connections to adjuncts.
TN556B/C/D  ISDN-BRI 4-Wire S/T-NT
Interface
The TN556 has 12 ports connecting to ISDN-BRI terminals. Each port on a TN556 has 
TXT, TXR, PXT, and PXR signal leads. Up to 8 ports can be used for Adjunct Switch 
Application Interface (ASAI) links. Each port operates at 192 kbps per second and has 2 
B-channels and 1 D-channel (not used to carry data).
The TN556 has a range of up to 1900 feet (579 m) maximum from the system to the voice 
terminal using 24 AWG (0.20 mm
2/0.51 mm) wire, and uses standard ANSI T1.605 
protocol. The TN556 also has multipoint support; 24 terminals can be connected, where 
each terminal uses 1 B-channel and shares the D-channel. In multi-support applications, 
2 voice terminals, or 1 voice terminal and 1 data terminal, or 2 data terminals can connect 
to each port.7103A-Series not supported not supported
8100-Series 24 AWG (0.2 mm
2/0.5 mm) 2,500 (762 m)
9100-Series 24 AWG (0.2 mm
2/0.5 mm) 2,500 (762 m)
Table 35. Terminals and wiring configurations supported by the TN479  — Continued  
Terminal Wire Size (metric area/diameter) Maximum Range 
Continued on next page 
						

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The TN556 circuit pack supports A-Law or µ-Law companding. The TN556 also functions 
as a trunk, connecting to a TE interface (example: a TN2185B in another DEFINITY 
ECS). It can be used for lines and trunks simultaneously (on the same circuit pack).
TN556C  are required for ISDN BRI service under R7 or later csi. 
TN556D  circuit packs provide end-to-end outpulse signaling when the circuit pack is in 
tie-trunk mode with a TN2185B.
TN566B  Multi-Function Board (see 
ED-1E546)
A component of ED-1E546, the DEFINITY AUDIX R3 (Circuit-Pack Assembly) (being 
replaced by ED-1E568). The TN566B monitors system power and environmental status, 
-48 VDC to +12 VDC power conversion for the disk drive and tape drive, and remote 
terminal access. 
TN567  Multi-Function Board (see ED-1E546)
A component of ED-1E546, the DEFINITY AUDIX R3 (Circuit-Pack Assembly) (being 
replaced by ED-1E568). TN567 multifunction circuit packs contain a CPU, controllers, 
memory devices, and signal processors.
TN568  DEFINITY AUDIX 4.0 Voice Mail 
System (see ED-1E568)
A component of the ED-1E568, the TN568 is a processor circuit pack that supports voice 
mail using an embedded 386EX processor. DEFINITY AUDIX systems can be 
interconnected to create large voice-mail networks that support up to 100,000 
subscribers and store up to 100 hours of messages. Each circuit pack has 8 ports 
available for calls when networking is enabled. Without networking, 12 ports are 
available. 
The TN568 takes up two adjacent slots, except in slot 6 of a CMC. 
The circuit pack includes a writable magneto-optical disk drive for backing up and 
upgrading system software and a hard disk for storing messages. There is an RS-232 
connection for a maintenance and administration terminal, an Ethernet port (for the 
Message Manager PC desktop application), an Amphenol connection to the switch, and 
an RS-232 port for an external, remote-maintenance modem. 
						

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DEFINITY ECS recognizes the TN568 as a TN746B, TN754 or a TN2181 in R6 or earlier 
systems, depending on the emulation mode that is used.
TN570B/C  Expansion Interface
The TN570 Expansion Interface (EI) is used in R7si/r or later systems. This circuit pack is 
an interface between the TDM bus and packet bus, and fiber optic links interconnecting 
cabinets. It is used in a Port Network (PN) between a PN and another PN in a 
direct-connect system, and between a PN and an SNI in a switch node carrier in a 
CSS-connected system. 
The TN570 provides control channel applications and time-slot interchanging between 
the PPN and EPNs. It is used when ISDN-BRI and/or ASAI is connected in an EPN, and 
is always used in R7r or later.
The TN570 carries circuit-switched data, packet-switched data, network control, timing 
control, and DS1 control. This circuit pack also communicates with the TN775B 
maintenance circuit pack in an EPN to send the EPN environmental and alarm status to 
the SPE.
The TN570 is replaced by the TN2242 when an ATM switch replaces the Center Stage 
Switch. 
TN570C  circuit packs are used in SREPN (Survivable Remote Expansion Port 
Network), R7 or later csi.
TN572  Switch-Node Clock for the r model 
only
The TN572 distributes the timing signals that synchronize the SN carrier. The TN572 also 
receives maintenance data.
TN573B  Switch-Node Interface for the r 
model only
The TN573B Switch Node Interface (SNI) routes circuit, packet, and control messages. 
The TN573B is an interface (installed in a SN carrier in a CSS that terminates a fiber optic 
link from a SNI in an SN carrier to an SNI in another SN carrier, an EI in a PPN, and an EI 
in an EPN. One TN573B is used per PN and supports the TN574 DS1 converter circuit 
pack.
The TN573B and higher provides an interface to the single-mode fiber optic transceiver 
and supports the TN1654 and TN574 DS1 converter circuit pack.  
						

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DEFINITY Enterprise Communications Server Release 8.2
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TN574  DS1 Converter (replaced by TN1654) 
for r only
The TN574 is replaced by the TN1654.
TN577  Packet Gateway for r only
The TN577 packet gateway (PGATE) provides 4 RS-423 physical ports for X.25 protocol 
interfaces between the system and adjuncts. In this application, PGATE functions as the 
data communications interface unit providing protocol conversion between the X.25 
protocol and the mode 3 protocol carried across the LAN Bus. 
The X.25 protocol (Levels 1 and 2) are terminated and the data reformatted into the ISDN 
packet mode protocol for transport across the LAN bus. Supported adjuncts include 
AUDIX, CMS, and Message Server Adjunct (MSA).
The TN577 also supports the Distributed Communications System (DCS) environment by 
providing X.25 signaling through 1 of the RS-423 physical ports, or back through the 
system using the TDM Bus to the appropriate DS1 or tie trunk circuit pack.
TN722B  DS1 Tie Trunk (replaced by 
TN767B/C/D/E)
This circuit pack is replaced by the TN767 DS1 Interface circuit pack.
TN725B  Speech Synthesizer, United States 
English
The TN725B has 4 ports that send voice message information to voice terminals to 
activate leave word calling, automatic wakeup, voice message retrieval, and Do Not 
Disturb features. The ports can detect tones.  
						

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TN726B  Data Line
The TN726B has 8 serial asynchronous EIA ports with modem interfaces connected 
through asynchronous data units (ADUs) to EIA ports (such as RS-232) on DTE. The 
TN726B uses Mode 2 or Mode 3 data transfer protocol. The DTE can be adjuncts and 
peripheral equipment such as data terminals, printers, host computers, personal 
computers (PCs), graphics and facsimile systems, and call detail acquisition and 
processing systems (CDAPSs).
With software-administered system access ports, a TN726B connects through a 
cross-connect field to a TN553 packet data line circuit pack. The TN553 then converts 
mode 2 protocol to mode 3 protocol transferring the TN726B from the packet bus to the 
TDM bus for EIA connections.
Each port on a TN726B has TXT (terminal, transmit, and tip), TXR (terminal, transmit, 
and ring), PXT (port, transmit, and tip), and PXR (port, transmit, and ring) signal leads.
TN735  MET Line
The TN735 has 4 ports that connect to multi-button electronic telephone (MET) sets. 
Each port has tip and ring (analog voice) and BT, BR, LT and LR (digital signals to control 
terminals) signal leads.
TN742  Analog Line (replaced by TN746B)
The TN742 is replaced by the TN746B analog line circuit pack.
TN744B/C/D  Call Classifier Tone Detector, 
Multi-Country
TN744B  
has 8 tone detectors used in vector prompting, outgoing call management 
(OCM), and call prompting applications in the United States and Canada. The TN744B 
detects special intercept tones used in network intercept tone detection in OCM. The 
TN744B also detects tones when a CO answers a call. The TN744B does not classify 
data calls. Instead, a tone detector circuit pack classifies the calls. If the TN744B does not 
classify the call within 60 seconds, it is removed from the call and timed far-end 
supervision classifies the call. 
						

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The TN744B provides tone generation and detection for R2-MFC DID signaling used in 
non-United States installations. The TN744 also allows gain or loss to be applied to pulse 
code modulation (PCM) signals received from the bus and supports A-Law and µ-Law 
companding. The TN744B detects 2025 Hz, 2100 Hz, or 2225 Hz modem answerback 
tones and provides normal broadband and wide broadband dial tone detection. For MFC, 
the TN744B vintage 7 or greater call classifier is required.
TN744B/C  circuit pack has 8 ports of tone detection on the TDM bus. The TN744/B/C 
does not support call progress tone generation or clocking
The TN744/B/C processor supports digital signal processing of PCM signals on each port 
to detect tones and other signals. Generation of signaling tones is also supported for 
applications such as R2-MFC, Spain MF, and Russia MF. Gain (or loss) and conferencing 
can be applied to PCM signals received from the TDM bus. Additional support includes 
DTMF detectors to collect address digits during dialing, and A-Law and µ-Law 
companding.
TN744D  circuit pack has 8 ports of tone detection on the TDM bus. The TN744D does 
not support call progress tone generation or clocking.
The TN744D supports all of the functions of the TN744C plus additional call classifier 
options for various countries. The TN744D processor supports digital signal processing of 
PCM signals on each port to detect, recognize, and classify tones and other signals. 
Generation of signaling tones is also supported for applications such as R2-MFC, Spain 
MF, and Russia MF. Gain (or loss) and conferencing can be applied to PCM signals 
received from the TDM bus. Additional support includes DTMF detectors to collect 
address digits during dialing, and A-Law and µ-Law companding. 
In normal operation, a port on the TN744D may serve as an incoming register for Russia 
MFR (multi-frequency shuttle register signaling). Use the TN744D Vintage1 with the 
TN429C analog line central office trunk for CAMA/E911.  
						

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TN746B  Analog Line 
(US and Canada Offer A Only)
The TN746B has 16 ports. Each port supports 1 voice terminal. LED message waiting 
indicators are not supported off premises. Auxiliary equipment — such as fax machines, 
answering machines, modems, and amplifier handsets — is supported.
The TN746B supports on-premises (in-building) wiring with either touch-tone or rotary 
dialing and with or without the LED and neon message waiting indicators. The TN746B 
supports off-premises wiring (out-of-building only with certified protection equipment) with 
either DTMF or rotary dialing, but LED or neon message waiting indicators are not 
supported off-premises. 
The TN746B, along with a TN755B neon power unit per carrier or per single-carrier 
cabinet, supports voice terminals equipped with neon message waiting indicators 
(on-premises use only). The TN746B supports 3 ringer loads, only 1 voice terminal can 
have an LED or neon message waiting indicator.
The TN746B supports µ-Law companding but not administrable timers. TN746C and later 
supports A-Law and µ-Law companding and administrable timers. The TN746B supports 
queue warning level lights associated with the DDC and UCD features, recorded 
announcements associated with the Intercept Treatment feature, and PagePac paging 
system for the Loudspeaker Paging feature. Additional support is provided for external 
alerting devices associated with the TAAS feature, neon message waiting indicators, and 
modems. Secondary lightning protection is provided on the TN746B only. The TN746B 
supports up to 8 simultaneous ports ringing. 
Combined conversion of Modem Pooling requires a port on a TN754B and a port on a 
TN742, TN746B or TN769 Analog circuit pack for each combined resource that is to be 
supported. 
						

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The TN746B is compatible with the terminal configurations shown in the table below.
TN747B  Central Office Trunk
The TN747B has 8 ports for loop-start or ground-start CO, foreign exchange (FX), and 
wide area telecommunications service (WATS) trunks. Each port has tip and ring signal 
leads. A port can connect to a PagePac paging system. The TN747B supports the 
abandoned call search feature in automatic call distribution (ACD) applications (if the CO 
has this feature). Vintage 12 or greater of the TN747B also provides battery reversed 
signaling.
TN748B/C/D  Tone Detector (replaced by 
TN2182B)
The TN748B/C/D is replaced by the TN2182B tone clock - tone detector and call 
classifier and the TN744C call classifier circuit pack.
TN750B/C  Announcement
The TN750 and TN750B record and store announcements to be played back on demand 
as part of a calling feature. The TN750 has sampling rates of 16, 32, or 64 kbps. The 
TN750 records announcement times of up to 2 minutes 8 seconds at 64 kbps, 4 minutes 
16 seconds at 32 kbps, and 8 minutes and 32 seconds at 16 kbps.
Table 36. Terminals and wiring configurations supported by the TN746B Circuit Pack 
Terminal Wire Size Maximum Range 
500-Type 24 AWG (0.2 mm
2/0.5 mm) 20,000 ft. (6,096 m)
2500-Type 24 AWG (0.2 mm
2/0.5 mm) 20,000 ft. (6,096 m)
7100-Series 24 AWG (0.2 mm
2/0.5 mm) 20,000 ft. (6,096 m)
7101A-Series 24 AWG (0.2 mm
2/0.5 mm) 15,200 ft. (4,633 m)
7103A-Series 24 AWG (0.2 mm
2/0.5 mm) 15,200 ft. (4,633 m)
8100-Series 24 AWG (0.2 mm
2/0.5 mm) 12,000 ft. (3,657m)
9100-Series 24 AWG (0.2 mm
2/0.5 mm) 12,000 ft. (3,657m)
Continued on next page 
						

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TN750B  can record messages from on- or off-premises voice terminals and can store 
up to 128 recorded announcements of 8 maximum minutes total. The TN750B has 16 
channels and each can play any announcement. Up to 25 call connections can listen to 
each channel. This means a total simultaneous call capacity of 400 calls in R7 or later si. 
256 callers can connect to each channel in R7r or later.
TN750C  Announcement circuit pack records and stores announcements that can be 
played back on demand as part of a calling feature. Equipping 10 circuit packs in a 
system provides a total capacity of 42.6 minutes (at 32 kbps) and 160 ports. In other 
words, 160 announcements can play simultaneously. The 16 kbps compression rate 
(adequate for VDN of origin announcements) provides a total capacity of 85.3 minutes. 
Use of multiple circuit packs allows a more efficient method of providing many kinds of 
announcements and provides improved management of integrated announcements.
TN753B  Direct Inward Dialing Trunk
The TN753B has 8 ports used for immediate-start and wink-start direct inward dialing 
(DID) trunks. Each port has tip and ring signal leads. For the Czech Republic of Slovakia 
and the Commonwealth of Independent States, vintage 17 (or greater) is required. The 
TN753B supports A-Law and µ-Law companding with vintage 17 (or greater).
The TN753B is required to support Brazil Block Collect Call.
TN754B/C  4-Wire DCP Digital Line 
The TN754B has 8 asynchronous, 4-wire DCP ports that can connect to 7400-series and 
8400-series digital voice terminals, attendant consoles, or data modules. The TN754B 
has administrable A-Law and µ-Law companding. The TN754B supports the 8400-series 
terminal/Data Module types and 7400-series terminals. 
						

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The TN754B does not support group paging.
The TN754C provides greater call handling capacity for high traffic applications and 
supports the group paging feature.
Combined conversion of Modem Pooling requires a port on a TN754B and a port on a 
TN742, TN746B or TN769 Analog circuit pack for each combined resource that is to be 
supported.
TN755B  Neon Power Unit for all Models 
except csi
The TN755B produces 150 VDC to operate neon message waiting lights on terminals 
connected to TN746B analog line circuit packs.
A TN755B neon power unit is required for each carrier where neon message waiting 
indicators are connected. 
This circuit pack and the neon message waiting function are not available on systems 
using the TN2202 ring generator circuit pack for France balanced-ringing.
Table 37. Maximum Range of 7400-series and 8400-series
Supported Equipment Distance Limits Wire
7400 Data Modules 5000 feet (1524 
m)24 AWG (0.2 
mm
2/0.5 mm)
7400 Data Modules 4000 feet 
(1219m)26 AWG
7400-series Telephones 3500 feet 
(1067m)24 AWG (0.2 
mm
2/0.5 mm)
7400-series Telephones 2200 feet 
(670m)26 AWG
8400-series Data Modules 3500 feet 
(1067 m)24 AWG (0.2 
mm
2/0.5 mm)
8400-series Telephones 3500 feet   
(1067m)24 AWG (0.2 
mm
2/0.5 mm)