Harris Constellation, Installation & Maintenance

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Harris Corporation Constellation™
Modem Assembly C-7
HA
RDWAR
E
COMPATIBILITY
TABLES
Modem Assembly
The new modem is only forward compatible. Across a HOP, a “like” modem
must face a “like” modem. A “near end” legacy modem cannot face a “far end”
new modem and vice versa. The legacy and new modems are compatible end-
to-end in a multi-hop system. A multi-hop system can use both new and legacy
modems as long as “like” modems face “like” modems across any HOP in the
system. New modems can be used in all previously shipped Constellation
radios.
Table C-5: History of Released Modems & Compatibility
Modem
Type
Part Number & Model Compatibility
Modem
101-115540-xxx / Model 1
Used with the High capacity radio: 155
or 3xDS3
• Option 001 for 155 or 3xDS3 or
2xDS3+28DS1
• Option 002 for 16 T1 High Gain
• Option 003 for 28 T1 or 1DS3 High
Gain
• Option 004 for 4xDS3 (High or
Standard Gain)
This unit only replaces modems with part # 101-
115540-xxx where xxx is the option number.
Caution : It cannot replace a modem (101-
115072-xxx) or a cable modem (101-115430-xxx).
The modems from the local and far end radio must
match; they must have the same part and option
numbers.
Cable
Modem
101-115530-xxx / Model 1
Used in Low/Medium capacity radios:
8xDS1, 16xDS1, 28xDS1 and DS3
• Option 001 for 8xDS1
• Option 002 for 16xDS1
• Option 003 for 28xDS1 or 1DS3
This unit only replaces modems with part # 101-
115530-xxx where xxx is the option number.
When replacing modules, the spare unit must have
the same option # as the one that is being
replaced.
Caution : It cannot replace a modem (101-
115072-xxx) or a high capacity modem (101-
115540-xxx). The modems from the local and far
end radio must match; they must have the same
part and option numbers.
Modem
Legacy
101-115072-xxx / Model 1
Used in Low/Medium capacity radios:
8xDS1, 16xDS1, 28xDS1 and DS3
• Option 001 for 8xDS1
• Option 002 for 16xDS1
• Option 003 for 28xDS1 or 1DS3
This unit only replaces modems with part # 101-
115072-xxx where xxx is the option number.
When replacing modules, the spare unit must have
the same option # as the one that is being
replaced.
Caution : It cannot replace a cable modem (101-
115430-xxx) or a high capacity modem (101-
115540-xxx). The modems from the local and far
end radio must match; they must have the same
part and option numbers.