Premier Mounts Modem CDM-600 Manual De Usuario

CDM-600 Satellite Modem 

Revision 7 

Open Network Operations 

MN/CDM600.IOM 

9–3 

Buffer Clock Reference 

Derived from Insert Data In (Insert Clock) 
External, RX (satellite) or TX (Terrestrial) 

ESC Data Interface Type 

EIA-232, Asynchronous 

ESC Data Rate 

1/2000 of primary data rate 

ESC Data Circuits Supported 

SD, RD, DSR 

 

ESC Data Interface Type 

EIA-232, synchronous to primary data 

ESC Data Rate 

1/480 of primary data rate 

ESC Data Circuits Supported 

SD, ST, RD, RT, DSR 

 

Satellite Backward Alarm 

1 (per IESS-309) 

Receive BWA Output 

Enabled onto terrestrial secondary alarm 

 

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 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. 

The IBS satellite framing/deframing is applied only to selected time slots of the data’s 
G.704 terrestrial structure.