Comtech EF Data CDM-625 - D&I Primary Data Interfaces; D&I Framing

CDM-625 Advanced Satellite Modem Revision 13
Open Network Operations MN-CDM625
14–4
14.3.1 D&I Primary Data Interfaces
When configured for D&I operation, multiplexing/demultiplexing follows the IBS satellite frame
structure and ESC features, but with the following changes:
• It accepts and outputs primary data through the G.703 connectors.
• The data rate must be at T1 or E1 rates only. This includes additional links for Drop Data
Out and Insert Data In.
• Clock recovery, dejitter, and encoding/decoding are performed as before.
14.3.2 D&I Framing
The IBS satellite framing/deframing is applied only to selected time slots of the data’s G.704
terrestrial structure.