Appendix p. open network operations, P.1 overview, P.2 ibs – Comtech EF Data CDM-625A User Manual
Page 715: Appendix p. open, Network, Operations
P–1
Appendix P. OPEN
NETWORK
OPERATIONS
P.1 Overview
This appendix summarizes the functionality and specifications of the IBS, Drop and Insert (D&I),
and IDR Open Network framing modes.
P.2 IBS
Primary Data Rates Supported
G.703
1544, 2048, 6312 and 8448 kbps SD, RD
EIA-422, V.35, LVDS
N x 64 kbps SD, RD (up to 8448 kbps)
ADPCM Audio (2 Channels)
64 kbps only, full duplex
Engineering Service Channel
Earth Station-to-Earth
Station Channel
EIA-232 data synchronous at 1/480 of the primary data
EIA-232 data asynchronous at 1/2000 of the primary data
High Rate Engineering Service Channel
ESC Data Interface Type
Async – configurable asynchronous character format, EIA-232 at up to
1/20
th
of primary data rate
ESC Data Rate
Example: 2400 baud at 64 kbps
Faults and Alarms
Satellite Backward Alarm
1 (per IESS-309)
Receive BWA Output
Enabled onto terrestrial secondary alarm