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CDM-600L Satellite Modem
Open Network Operations
ESC Data Interface Type
ESC Data Rate
ESC Data Circuits Supported
ESC Data Interface Type
ESC Data Rate
ESC Data Circuits Supported
ESC Data Interface Type
ESC Data Rate
Satellite Backward Alarm
Receive BWA Output
9.3.1
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:
9.3.2
D&I Framing
The IBS satellite framing/deframing is applied only to selected time slots of the data's
G.704 terrestrial structure.
Asynchronous Engineering Service Channel
Synchronous Engineering Service Channel
High Rate Engineering Service Channel (Future Upgrade)
•
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.
RS-232, Asynchronous
1/2000 of primary data rate
SD, RD, DSR
RS-232, synchronous to primary data
1/480 of primary data rate
SD, ST, RD, RT, DSR
Async – configurable async character format
Example: 2400 baud at 64 kbps
Faults and Alarms
1 (per IESS-309)
Enabled onto terrestrial secondary alarm
9–3
Revision 2
MN/CDM600L.IOM
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