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Connecting telephones
Issue 3 January 2008 79
DS1 interface trunks using T1 channel service unit
The T1 channel service unit (CSU) interfaces the DS1 interface trunks with the 1.544 megabits
per second digital facility.
Connect the DS1 interface trunk to a T1 CSU. See Figure 39: Typical connections to channel
service unit on page 79.
Note:
Note: A 3150 CSU is shown, a 120A Integrated CSU (ICSU) may be used.
Contact your Avaya representative for maximum cabling distances for the 3127 series CSU or
the 120A ICSU.
Figure 39: Typical connections to channel service unit
Figure notes:
1. Connector to DS1 Interface Circuit Pack
2. C6C Cable (For Distances Over 50 ft (15 m),
Use C6E Cable(s))
3. T1 Channel Service Unit (CSU) 3150 Shown
4. T (Tip)
5. R (Ring)
6. T1 (Tip 1)
7. R1 (Ring 1)
8. 1.544 Mbps Digital Service Interface
9. To T1 Carrier
0012
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1 RBP 062696
AUXPORTCOM PORT MODEM
DTE
NETWORK
POWE R