Installing the AlphaServer IP Platform Hardware

2.4.1.1.2 Connecting Dialogic DTI/212 E-1 Modules (75-Ohm)

The Dialogic DTI/212 E-1 modules come in 75-ohm and 120-ohm versions. If you have a DTI/212 120-ohm module, see Section 2.4.1.1.3. Refer to the Dialogic Network Hardware Reference for additional information on DTI/212 E-1 modules.

On the rear bracket of the DTI/212 75-ohm module are two BNC-type jacks for connecting to the external E-1 network. The cabling between these jacks and the external E-1 network should be 75-ohm coaxial. The DTI/212 end of the cable should consist of a BNC-type male connector. The user is responsible for supplying an appropriate cable for these connections. The pin designations for the DTI/212 75-ohm cable ends are given in Table 2-3.

Table 2-3: E-1 to DTI/212 75-Ohm Pin Designations

Signal

Jack/Pin

Transmit data: output from DTI/212 (tip)

J201A center

Transmit data: output from DTI/212 (ring)

J201A shield

Receive data: input to DTI/212 (tip)

J201B center

Receive data: input to DTI/212 (ring)

J201B shield

 

 

To cable the DTI/212 75-ohm module to the E-1 network, follow these steps:

1.Attach the appropriate end of the E-1 to DTI/212 (receive) cable to jack J201B on the rear bracket of the DTI/212 module. Carefully push the BNC connector onto the jack and lock by turning a quarter-turn clockwise.

2.Attach the appropriate end of the DTI/212 to E-1 (transmit) cable to jack J201A on the rear bracket of the DTI/212 module. Carefully push the BNC connector onto the jack and lock by turning a quarter-turn clockwise.

2.4.1.1.3 Connecting Dialogic DTI/212 E-1 Modules (120-Ohm)

On the rear bracket of the DTI/212 120-ohm module is an RJ-48C jack for connecting to the external E-1 network. The cabling between this jack and the CSU should be 120-ohm twisted pair or equivalent. The DTI/212 120-ohm end of the cable should consist of an RJ-48C plug. The user is responsible for supplying an appropriate cable for these connections. The pin designations for the DTI/212 120-ohm cable ends are given in Table 2-4.

Table 2-4: E-1 to DTI/212 120-Ohm Pin Designations

Signal

Pin(s)

Receive ring: input to the DTI/212 120-ohm module

1

Receive tip: input to the DTI/212 120-ohm module

2

No connection

3, 6

Transmit ring: output from the DTI/212 120-ohm module

5

Transmit tip: output from the DTI/212 120-ohm module

4

Optional shield

7, 8

 

 

2–6AlphaServer Intelligent Peripheral Platform Hardware Owner's Guide

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Compaq EK-ASIP2-OG. D01 manual Connecting Dialogic DTI/212 E-1 Modules 75-Ohm, E-1 to DTI/212 75-Ohm Pin Designations
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