Zhone Technologies Network Device manual Imacs Using TR-008, T1-E1 Conversion

Zhone Technologies, Inc. IMACS Product Book, Version 4

IMACS

2 x T1/E1 POTS/

CLASS

•48 TR008 Lines

•MODE 1 (Shelves A&B)

Customer Premise

D S X

P A N E L

Local Digital Switch

Central Office

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	IMACS	W1-2
	W2-1		W2-2	E1
DS1
				Transport
Transport	W3-1		W3-2	Network
Network
	W4-1		W4-2

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-∝ -Law, ∝ -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.

March 2001 Page 41