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Chapter 14. OPEN NETWORK
14.1 Overview
This chapter summarizes the functionality and specifications of the IBS, Drop and Insert (D&I),
and IDR Open Network framing modes.
14.2 IBS
G.703
EIA-422, V.35, LVDS
ADPCM Audio (2 Channels)
Earth Station-to-Earth
Station Channel
ESC Data Interface Type
ESC Data Rate
Satellite Backward Alarm
Receive BWA Output
Primary Data Rates Supported
1544, 2048, 6312 and 8448 kbps SD, RD
N x 64 kbps SD, RD (up to 8448 kbps)
64 kbps only, full duplex
Engineering Service 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
Async – configurable asynchronous character format, EIA-232 at up to
1/20
of primary data rate
th
Example: 2400 baud at 64 kbps
Faults and Alarms
1 (per IESS-309)
Enabled onto terrestrial secondary alarm
14–1
OPERATIONS
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