Ami Or Hdb3/B8Zs; E1 Bal Or Unbal; T1/E1 Balanced 15 Pin D-Sub Pinout - Comtech EF Data CIC-50 Installation And Operation Manual

T1/e1 g.703 interface converter

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3.1.2

AMI or HDB3/B8ZS

For both T1 and E1 formats, this sets the G.703 output to either the uncoded Alternate

Mark Invert (AMI) format, or to the appropriate zero substitution line code used for T1

(B8ZS) or E1 (HDB3).

3.1.3

For E1 only, this adjusts the impedance on the G.703 input between 120 ohms for

balanced and 75 ohms for unbalanced. The 15-pin D-sub connector should be used for

balanced and the two BNC connectors for unbalanced. For T1 this selection is a 'don't

care' since unbalanced is not an option, and the D-sub connector must always be used.

3.1.4

Balanced G.703 Tx (Inputs)

3, 11

Balanced G.703 Rx (Outputs)

2, 4

Ground

6, 7, 8, 14, 15

Don't Connect (reserved for redundancy system)

CIC-50 T1/E1 G.703 Interface Converter

Rev. 1

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