Filter
Top Products
P300H P300 Series Modem Installation and Operating Handbook Page 78
Tx Aux Port: [?] 1=Off
2=INTELSAT low rate channel 3=Sync Channel
Change, Tx/Rx, ESC/Aux/BA, Define (IBS), Aux Menu
ESC Port [?]:
1=Off 2:High Rate async channel
Change, Tx/Rx, ESC/Aux/BA Define (IBS), ESC Menu
IBS MODE ESC & AUX PORT DEFINITIONS
6.6.27 Change, Tx/Rx, ESC/Aux/BA, DEFINE (IBS) Menu
When operating in IBS or Custom IBS modes, the Define selection is as follows:
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
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.