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Chapter 9. OPEN NETWORK
9.1
Introduction
This section summarizes the functionality and specifications of the various Open
Network operating modes (IDR, IBS and D&I).
9.2
IBS
G.703
RS-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, 6321, 8448 kbps SD, RD
N x 64 kbps SD, RD (up to 8448 kbps)
64 kbps only, full duplex
Engineering Service Channel
RS-232 data synchronous at 1/480 of the primary data
RS-232 data asynchronous at 1/2000 of the primary data
High Rate Engineering Service Channel
Async – configurable async character format, RS-232 (up to 1/20
of the primary data rate)
Example: 2400 baud at 64 kbps
Faults and Alarms
1 (per IESS-309)
Enabled onto terrestrial secondary alarm
9–1
OPERATIONS
th
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