Avaya 03-300430 User Manual

The DS1 Interface circuit pack provides an interface to an external DS1 facility and supports 24 
DS0 channels carried on a 1.544-Mbps DS1 link. These DS0 channels can be administered as 
either trunks to other switches or lines to off-premises stations. The TN464C (or later-suffixed) 
Universal DS1 Interface also supports a 32-channel interface on a 2.048-Mbps link. The 
functions and maintenance strategy for the TN464 circuit packs are covered under a separate 
MO, 

DS1-BD maintenance logs in-line errors reported by the DS1 Interface circuit pack, runs tests 
for error diagnosis and recovery, and raises and clears alarms. The following table shows the 
capabilities of each DS1 circuit pack. The TN722 and TN722B are not supported on G3r V1 or 
later systems.

ISDN-PRI Trunk signaling (for example, Q.921, Q.931) requires a TN464D or higher suffix, 
TN2464, or TN2242 (tie trunk signaling only) and is handled by system software. The TN464, 
TN2464, and TN2242 are covered in 

Each trunk and line have their own maintenance strategies. However, they all depend on the 
health of the DS1 Interface circuit pack. See the following sections for details: 

on page 886, 

on page 1446, and 

Signaling over the DS1 link must be synchronized between the transmitting and receiving ends 
to ensure error-free communication. See 

for details.

DS1-BD

MAJ

test board location sh

DS1 Interface circuit pack

DS1-BD

MIN

test board location l

DS1 Interface circuit pack

DS1-BD

WRN

test board location sh

DS1 Interface circuit pack

TN722/B

X

X

TN767/B/C/D/E

X

X

X

X

X

TN464C/D/E/F/GP

X

X

X

X

X

X (24-chl only)

TN2313

X

X

X

X

X

X