Comtech EF Data SDM-300A - Manual (Page 280)

SDM-300A Satellite Modem Revision 6
Open Network Operations MN/SDM300A.IOM
10–24
Notes:
1. When selecting E1_CAS or E1_CCS D&I data format, the defaults in the D&I data channels are offset by 1
from 16 and up. When programming from E1_CAS or E1_CCS to any other format, the D&I channels are
defaulted to straight through.
2. 0 dBm if High Power option is installed.
10.4.11 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:
• Accepts and outputs primary data through the 50-pin connector using G.703.
• 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.
10.4.12 D&I Framing
The IBS satellite framing/deframing is applied only to selected time slots of the data’s
G.704 terrestrial structure.