Premier Mounts CDM-600 specifications 1 D&I Primary Data Interfaces, 2 D&I Framing

CDM-600 Satellite Modem		Revision 7
Open Network Operations		MN/CDM600.IOM
	Buffer Clock Reference	Derived from Insert Data In (Insert Clock)
		External, RX (satellite) or TX (Terrestrial)
	Asynchronous Engineering Service Channel
	ESC Data Interface Type	EIA-232, Asynchronous
	ESC Data Rate	1/2000 of primary data rate
	ESC Data Circuits Supported	SD, RD, DSR
	Synchronous Engineering Service Channel
	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
		Faults and Alarms
	Satellite Backward Alarm	1 (per IESS-309)
	Receive BWA Output	Enabled onto terrestrial secondary alarm

9.3.1D&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 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.

9.3.2D&I Framing

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

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