Comtech EF Data CIC-50 - Manual (Page 13)

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Chapter 1.
INTRODUCTION
While the CDM-550/550T modem is capable of data rates up to 2048 kbps, its standard
interface is limited to EIA-422, V.35 and EIA-232 formats only.
In order to accommodate the G.703 data formats commonly used at 1544 kbps (T1) and
2048 kbps (E1), the CIC-50 converter attaches to the rear of the modem at the 25-pin
data connector. No external power is required and all settings are made on the CIC-50
using three switches. Two LED indicators are also present for monitoring the condition of
the G.703 terrestrial link.