Paradise P300 IBS Mode ESC & AUX Port Definitions, Change, Tx/Rx, ESC/Aux/BA, Define IBS Menu

IBS MODE ESC & AUX PORT DEFINITIONS

6.6.27Change, Tx/Rx, ESC/Aux/BA, DEFINE (IBS) Menu

When operating in IBS or Custom IBS modes, the Define selection is as follows:

	Tx Aux Port: [?] 1=Off
	2=INTELSAT low rate channel 3=Sync Channel
	Change, Tx/Rx, ESC/Aux/BA, Define (IBS), Aux Menu
OFF	The Aux port is disabled.
INTELSAT	The Aux port provides the `low rate ESC` definition in IESS309 (which then refers
	back to IESS403). In this mode only TS32 bit 1 of the overhead is allocated to the
	Aux port, which provides an oversampled async interface at a maximum Baud
	rate of approx 1/2000th the main data rate. Note that even in this mode a clock
	is available, and the port may be used synchronously (at 1/480th the data rate)
	if required.

SYNC CHANNEL This option is only available if the IDR option is fitted (standard on P300-IDR and above) as it requires the `Clock/Data/Octet` Aux port on the IDR option to provide the synchronous Aux interface (the single `Data` line used for the oversampled INTELSAT ESC on the Async ESC connector cannot provide a synchronous interface). If selected the Aux port operates synchronously, and varying amounts of the IBS overhead may be allocated to the sync Aux channel. The sync channel may utilise at up to a total of 21/32nds of the overhead which with Standard IBS/SMS this allows the Aux port to operate up to 4.375% of the main data port rate. The selection of the overhead available to the Aux channel is made following the next menu (which specifies the ESC port), allowing the overhead to be allocated between the Aux port and ESC ports.

This menu is followed by

	ESC Port [?]:
	1=Off 2:High Rate async channel
	Change, Tx/Rx, ESC/Aux/BA Define (IBS), ESC Menu
OFF	The ESC port is disabled
HIGH RATE
ASYNC	The ESC Channel provides the `Paradise High Rate ESC`, which in a later menu
	may be configured to be compatible with earlier products such as the P230,
	P230D/I, and P1300/P1361 combination. This provides an async channel with
	maximum Baud rate approximately the terrestrial rate / 23 (eg usable rates of
	2400 Baud at 64 kbps and 9600 Baud at 256 kbps). One of the prime uses for this
	ESC channel is to link it to the M&C port of the Modem (software controlled
	internal link), and provide remote M&C of the distant equipment from the local
	end of the link.

P300H P300 Series Modem Installation and Operating Handbook Page 78