Premier Mounts CDM-600 사용자 설명서
CDM-600 Satellite Modem
Revision 7
Clock Modes and Drop and Insert (D&I)
MN/CDM600.IOM
10–6
10.4 Drop
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
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
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.
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.