Premier Mounts CDM-600 specifications 10-6

CDM-600 Satellite Modem	Revision 7
Clock Modes and Drop and Insert (D&I)	MN/CDM600.IOM

10.4Drop and Insert

The Drop and Insert (D&I) multiplexer works in conjunction with the G.703 interfaces to enable the modem to transmit or receive fractional parts of a T1 or E1 data stream.

The D&I option provides fully compliant baseband processing in accordance with Intelsat IESS-309 for the terrestrial information rate of 2048 kbps (E1) and 1544 kbps (T1), using G.703 interfaces. The data rate sent over the satellite link is n x 64 kbps. See the Frame Formats diagram for the permissible values of n. The modem provides the interface to transmission level framing compliant to IESS-309 data type 2.

Notes:

1.For Hardware Version 2.0 or higher, Firmware Version 1.3.1 or higher, D&I operation is possible through the 25-pin data port in either RS-422 or V.35 format. If used, the DDO/IDI ‘inner loop’ is not available.

2.For Firmware Version 1.5.0 or higher, D&I operation can also be done using the proprietary D&I++ framing mode.

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