Zhone Technologies IMACS Network Device - Manual (Page 45)

Zhone Technologies, Inc. IMACS Product Book, Version 4
March 2001 Page 41
POTS/
CLASS
D
S
X
P
A
N
E
L
Local Digital Switch
Customer Premise
Central Office
2 x T1/E1
IMACS
• 48 TR008 Lines
• MODE 1 (Shelves A&B)
Figure 12a - IMACS Using TR-008
IMACS TR-008 feature can support 48 lines on 2 T1 links. IMACS is an ideal vehicle to provide integrated POTS
services for line sizes of 48 and under. IMACS supports Mode I, Shelf A&B of TR-008 specification. The IMACS
supports extensive testing and diagnostics capabilities, which minimizes troubleshooting and allows for high service
levels.
T1-E1 Conversion
The Digital Access and Cross-connect System (DACS) capabilities and the signaling and companding conversion
features of the IMACS can be used to provide gateway functionality between a DS1 transport network and an E1
transport network. See Figure 12b for an illustration of this capability.
W1-1
W2-1
W1-2
W3-1
W4-1
W2-2
W3-2
W4-2
DS1
Transport
Network
E1
Transport
Network
IMACS
Figure 12b - IMACS Using T1/E1 Conversion
Depending on the application, the signaling conversion can be set by the user to ITU-to-ANSI; ANSI-to-ITU or
None. Similarly, the companding can be set by the user to A-Law-to-
µ
-Law,
µ
-Law-to-A-Law or none. As shown
in the figure above, each WAN card must be configured with one port for DSX1 and one for CEPT. A cross-
connection circuit must be made for each DS1 to E1 DSO re-assignment. Time Slots 0 and 16 cannot be used on the
E1 link. Time slot 0 is used for timing and time slot 16 is used for Channel Associated Signaling (CAS). TS16 is
available in data-only applications.