DEFINITY Made Easy Tools
Issue 3, December 2001

Install and Administer Trunks

Add TN1654 DS1 Converter (R10r Only)

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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.

DS1 Converter Circuit Pack Switches shows the location of the switches. TN1654 DS1 Converter Switch Functions and TN1654 DS1 Converter Switch Settings show the switch-setting functions and positions, respectively.

Circuit Pack and Cabling (T1 Only)

The installation instructions are provided as examples only.

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. 127A BALUN Coaxial Adapter shows the 127A BALUN coaxial adapter.

DS1 Converter Circuit Pack Switches

.

127A BALUN Coaxial Adapter

Figure Notes:

1. 127A BALUN coaxial adapter


2. Connect to quad cable (H600-348 or similar)


3. BCN Connections to E1 network equipment


4. Single-point ground connection


5. >= 0.75 mm ² (18 AWG) ground wire to ground terminal at MDF

DS1 Converter Connections for E1 75-ohm Service -- Part 2

Figure Notes:

1. H600-348 quad cable


2. 15-pin male D connectors


3. 127A BALUN coaxial adapter


4. BNC connectors (transmit/receive) corresponding to each facility


5. E1 network connection


6. Network interface