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P300H P300 Series Modem Installation and Operating Handbook Page 185
ESC/AUX & BACKWARD ALARMS CONNECTOR
This connector is fitted as part of the IDR option (standard on P300-IDR and above). Note that when this
option is fitted the ESC and Aux ports on this connector replace the shared ESC/Aux port on the
Async ESC connector.
Connector type : 50 pin `D' female
ESC Port
Pin Number Sync Async RS 485 / RS422 RS 232 usage
usage
30
Tx ESC Clock out A Tx ESC Clock out
31
Tx ESC Clock out B n/c
13
Tx ESC Data in A Tx ESC Data in
14
Tx ESC Data in B n/c
32
Rx ESC Clock out A Rx ESC Clock out
33
Rx ESC Clock out B n/c
15
Rx ESC Data out A Rx ESC Data out
16
Rx ESC Data out B n/c
46 (
) Tx ESC Octet out A Tx ESC Octet out
47 (
) Tx ESC Octet out B n/c
48 (
) Rx ESC Octet out A Rx ESC Octet out
49 (
) Rx ESC Octet out B n/c
17
Ground Ground
(
) indicates lines are optional
In Closed Net Plus ESC mode the variable rate async ESC is available on this port.
In IBS modes high rate async ESC is available on this port.
In IDR modes this port provides access to the 8kbps IDR ESC channel. This can either by synchronous
at 8kbps, or (if the Async ESC feature is available) asynchronous at up to 4800 or 9600 Baud.