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...

Cabinets, Carriers, and Circuit Packs 
142 Circuit Packs and Related Hardware 
DEFINITY Enterprise Communications Server Release 8.2
System Description  555-233-200  Issue 1
April 2000
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...

DEFINITY Enterprise Communications Server Release 8.2
System Description  555-233-200  Issue 1
April 2000
Cabinets, Carriers, and Circuit Packs 
143 Circuit Packs and Related Hardware 
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...

Cabinets, Carriers, and Circuit Packs 
144 Circuit Packs and Related Hardware 
DEFINITY Enterprise Communications Server Release 8.2
System Description  555-233-200  Issue 1
April 2000
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...

DEFINITY Enterprise Communications Server Release 8.2
System Description  555-233-200  Issue 1
April 2000
Cabinets, Carriers, and Circuit Packs 
145 Circuit Packs and Related Hardware 
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...

Cabinets, Carriers, and Circuit Packs 
146 Circuit Packs and Related Hardware 
DEFINITY Enterprise Communications Server Release 8.2
System Description  555-233-200  Issue 1
April 2000
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...

DEFINITY Enterprise Communications Server Release 8.2
System Description  555-233-200  Issue 1
April 2000
Cabinets, Carriers, and Circuit Packs 
147 Circuit Packs and Related Hardware 
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...

Cabinets, Carriers, and Circuit Packs 
148 Circuit Packs and Related Hardware 
DEFINITY Enterprise Communications Server Release 8.2
System Description  555-233-200  Issue 1
April 2000
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...

DEFINITY Enterprise Communications Server Release 8.2
System Description  555-233-200  Issue 1
April 2000
Cabinets, Carriers, and Circuit Packs 
149 Circuit Packs and Related Hardware 
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...

Cabinets, Carriers, and Circuit Packs 
150 Circuit Packs and Related Hardware 
DEFINITY Enterprise Communications Server Release 8.2
System Description  555-233-200  Issue 1
April 2000
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...