Paradise P300 specifications Aux Port, Pin Number Sync Async RS422 usage

Aux Port

Pin Number

26

27

9

10

28

29

11

12

42

43

44

45

50

Sync Async

U

( )

( )

( )

( )

RS422 usage

Tx Aux Clock out A

Tx Aux Clock out B

Tx Aux Data in A

Tx Aux Data in B

Rx Aux Clock out A

Rx Aux Clock out B

Rx Aux Data out A

Rx Aux Data out B

Tx Aux Octet out A

Tx Aux Octet out B

Rx Aux Octet out A

Rx Aux Octet out B

Ground

RS 232 usage

Tx Aux Clock out

n/c

Tx Aux Data in

n/c

Rx Aux Clock out

n/c

Rx Aux Data out

n/c

Tx Aux Octet out

n/c

Rx Aux Octet out

n/c

Ground

( ) indicates lines are optional

In Closed Net Plus ESC mode the aux port is not used.

In IBS modes the Aux port can be set to both `INTELSAT` (using TS32 bit 1) and `Sync` modes (selectable to use any of TS16, TS32 bits 1& 5-8, & TS48). In both modes a clock is provided and the port can be used synchronously (with the clock), or asynchronously (allowing the async data to be oversampled by the higher rate clock). In this oversampled mode (as specified by INTELSAT), the Baud rate is limited to approximately 25-33% of the synchronous clock rate.

In IDR modes the Aux port provides either 32 or 64kbps data access in place of either one or both of the 32kbps ADPCM audio channels. Typically this would be used synchronously, but if required it could be used asynchronously & oversampled giving maximum baud rates of approx 9600 Baud (in place of one audio channel) or 19200 Baud (in place of both Audio channels).

P300H P300 Series Modem Installation and Operating Handbook Page 186