Task List: Adding A Tn1654 Ds1 Converter; Circuit Pack Switches; Circuit Pack And Cabling (T1 Only); 75-Ohm E1 Interface Cabling - Avaya MCC1 Installation And Upgrades

Install and Administer Trunks
Add TN1654 DS1 Converter (r only)
The TN1654 DS1 converter circuit pack supports from 1 to 4 T1 (24 channel) or E1 (32 channel)
facilities.
For more information on this DS1 converter, see
•

Circuit Pack Switches

•

Circuit Pack and Cabling (T1 Only)

•

75-ohm E1 Interface Cabling

Task List: Adding a TN1654 DS1 Converter

•
Set Circuit Pack Switches (TN1654 DS1 Converter)
•
Installing TN1654s in a Port Carrier
•
Installing TN1654s in a Switch Node Carrier
•
Connecting a Port Carrier to a Switch Node Carrier (TN1654 DS1 Converter)
•
Connecting Through a Channel Service Unit
•
Mounting the 127A (TN1654 DS1 Converter)
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Circuit Pack Switches
The configuration switches on the TN1654 must be set before the circuit pack is installed. The TN1654
can be configured for either T1 or E1 operation. All 4 facilities on the circuit pack are configured as a
group. It is not possible to have T1 and E1 facilities supported on the same circuit pack at the same time.
The T1 line impedance is fixed at 100 ohms, and the T1 framing is selectable for ESF (Extended Super
Frame) or D4 for each facility. The E1 facility line supports termination impedances of 120 ohms for
twisted-pair and 75 ohms for coax wiring.
Figure 273, DS1 Converter Circuit Pack Switches,
TN1654 DS1 Converter Switch Functions
page 680 show the switch-setting functions and positions, respectively.
Circuit Pack and Cabling (T1 Only)
The installation instructions are provided as examples only.
NOTE:
Be sure to label all of the cables as they are installed.
75-ohm E1 Interface Cabling
For certain markets with 75-ohm E1 service, the DS1 converter requires an adapter to convert the 120
ohms to 75 ohms.
coaxial adapter.
678
on page 678
on page 678
on page 678
on page 682
on page 679 and
Figure 274, 127A BALUN Coaxial Adapter,
on page 681
on page 683
on page 685
on page 689
on page 679 shows the location of the switches.
TN1654 DS1 Converter Switch Settings
on page 680 shows the 127A BALUN
SI Installation and Upgrades
on page 684
on
June 2004