Tr008 Application; Iad Using Tr008 - Zhone IMACS 8000 User Manual

Running Head
Voice Modules
4.2.5

TR008 Application

BellCore's TR-TSY-000008 standard describes the requirements necessary for a Local Digital
Switch (LDS) to connect to a remote terminal (RT) across a T1 (1.544Mbps) digital interface.
The standard allows supporting from one to four T1s per RT without facility Automatic
Protection Switching (APS), and three to five T1s with facility APS.
The LDS can interface the RT in Mode I (no concentration), Mode II (2:1 concentration), and
Mode III (24 special-service circuits on 24 DS1 time-slots). TR008 supports traditional POTS,
CLASS, and Coin services but does not support ISDN BRI.
If the service provider deploys a channel bank at the customer premise that does not provide
TR008 capability then it needs a 1/0 DCS with TR008 capability at the central office to
integrate with the LDS.
In addition to the many Integrated Access System functionality's, the system also supports
TR008 switch integration. The Integrated Access System with TR008 operation can connect
directly to the LDS, eliminating the need for the 1/0 DCS as shown in Figure 4-2.
POTS/Class
48 TR008 Lines
MODE 1 (Shelves A&B)
The TR008 feature can support 48 lines on 2 T1 links. This is an ideal vehicle to provide
integrated POTS services for line sizes of 48 and under. This system supports Mode I, Shelf
A&B of TR008 specification. The system supports extensive testing and diagnostics
capabilities which minimizes troubleshooting and allow high service levels.
4-6
IAD
2 x T1/E1
C
M O
R
R G
Customer Premise
Figure 4-2.IAD using TR008
Applications
Local Digital
Switch
D
S
X
P
a
n
e
l
Central Office
Reference Guide
Model No.