Premier Mounts CDM-600 specifications Idr, Ccitt G.721

CDM-600 Satellite Modem	Revision 7
Open Network Operations	MN/CDM600.IOM

9.4IDR

Primary Data Rates Supported

G.703

EIA-422 (Replaces 8K Overhead)

V.35 (Replaces 8K Overhead)

1544 kbps SD, RD

2048 kbps SD, RD

6312 kbps SD, RD

8448 kbps SD, RD

	Engineering Service Channel
ESC Audio	2 duplex ADPCM channels
Audio Encoding	CCITT G.721
Audio Interface Type	600Ω transformer-balanced 4-wire
Audio Input Level	Nominal Input : 0dBm0 (-3dBm, 600Ω)
	Adjustment range: -6 to +8 dB, 2 dB steps
Audio Output Level	Adjustment range: -6 to +8 dB, 2 dB steps
Audio Filtering	Internal 300 to 3400 Hz input and output
ESC Data Interface Type	EIA-422
ESC Data Rate	8 kbps, also 64 kbps if ADPCM audio is not used
ESC Data Circuits	SD, ST, RD, RT, Octet in, Octet out
Supported
Data Signal Phasing	Per EIA-449, data changes on the rising clock transition, is
	sampled on the falling clock edge
Octet Timing	Octet high with every 8th bit, aligns with frame bit d8

	Faults and Alarms
Backward Alarms	4 input, 4 output
Supported
Backward Alarm Inputs	1 kΩ pull up to ground, set high to activate.
Backward Alarm Outputs	Form C Relay, N/O, N/C, Com

9–4