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P300H P300 Series Modem Installation and Operating Handbook Page 81
Max ESC rate=2650 Baud (YES)
Aux sync rate=1387bps, async=346 Baud
Change, Tx/Rx, ESC/Aux/BA Define (IBS) ESC/Aux Custom 1
Async ESC port:
1:Baud rate [2400] 2:Format [8,N] 3=Set as M&C port [=]
Change, Tx/Rx, ESC/Aux/BA, C.g., Async Menu
Note 1: Spare unless the unit is configured for 2048kbps, IBS G.732 mode, with spare bits of TS0 set
to transparent (when these bits carry the spare bits).
To summarise:
In standard IBS modes up to (8+8+2+2+1+1) bits = 22/32nd of the overhead may be allocated to the
ESC port, and up to (8+8+2+2+1) bits = 21/32nds of the overhead may be allocated to the Aux
port. 21 of these bits are shared between ESC & Aux.
In Custom IBS modes (without backward alarm or TS32 multiframe) up to (8+8+2+2+1+1+1+1) bits
= 24
/32nd of the overhead may be allocated to the ESC port, the Aux port is as above for Standard
IBS, and 21 of these bits remain shared between ESC & Aux.
When the overhead has been assigned as required, press the YES key which provides the following screen:
This summarises the ESC & Aux port rates based on the overhead assignments just made:
The Max ESC Baud Rate is the maximum continuous rate the ESC channel will support, the ESC
channel must be set to a standard async Baud rate equal or below this figure using the Async ESC
menu selection.
The Aux Sync Rate is the data rate of the Aux port. A DPLL generates this clock however obscure the
rate !
The Aux async Baud is the maximum Baud rate that could be conveyed through this Aux channel, if
the Aux clock is ignored and the Aux port is used in oversampled async mode (as defined by
INTELSAT for the low rate IBS ESC).
The Aux Sync Rate and Aux async Baud information display is not available in early versions of the
embedded M&C code.
6.6.29 Change, Tx/Rx, ESC/Aux/BA, ASYNC ESC Menu
This menu allows the async parameters for the ESC interface to be defined.
BAUD RATE Allows the ESC Baud rate to be set (see below), the current Baud rate setting is
displayed.
FORMAT Allow the async character format for the ESC port to be set (see below), the
current async character format is displayed.
SET AS M&C When selected this copies the remote M&C async settings to the ESC port, to
simplify using the ESC port for remote M&C. This is a one time copy, and the ESC
port configuration will not track changes to the remote M&C configuration. When
the ESC port is configured as the remote M&C port, [=] appears, when not equal
[
] appears.