Paradise P300 CHANGE, TX Menu, Tx 1Service 2Baseband 3Clocking 4Modulator 5ESC/Aux/BA

6.6CHANGE, TX MENU

The Change, Tx menu is shown below. Note that options 2-5 are only displayed when the SERVICE option is set to something other than `Off`, and so initially, the screen may only show the SERVICE option.

Tx: 1:Service 2:Baseband

3:Clocking 4:Modulator 5:ESC/Aux/BA

Change, Tx Menu

Taking each of these possible selections in turn:

6.6.1Change, Tx/Rx, SERVICE Menu

Tx Service: [IDR] 1=Off 2=Closed Network

3=IBS/SMS 4=IDR 5:Custom

Change, Tx/Rx, Service Menu

The options are:

OFF	This disables the path completely for Tx or Rx only operation. All alarms for that
	path are muted, and traffic faults ignored. For the Tx path the Tx carrier is also
	muted.
CLOSED NET	The Tx/Rx path operates in a `Closed Network` mode. If the Async ESC feature
	is available (standard P300-IBS and above) then a subsequent screen (described
	in the next section) asks if it is normal Closed Network, or whether Closed Net
	Plus ESC is required. Normal Closed Network adds no overhead to the data and
	is compatible with other closed network equipment such as the Paradise P200,
	and closed network equipment from other vendors.
	Closed Net Plus ESC adds the lowest possible overhead to the satellite data to
	provide whatever ESC rate is selected. When this mode is selected there is also
	the option to provide a Backward Alarm facility. Closed Net Plus ESC also has the
	advantage that at rates above 32kbps a synchronous scrambler is used (in place
	of the error multiplying V.35 scrambler used on normal closed network links) and,
	if used with Drop/Insert, the `Timeslot Identity is maintained`. If you want the
	backward alarm, synchronous scrambler, or Timeslot ID Maintenance
	advantages of Closed Net Plus ESC, but don’t want an ESC channel, simply
	select the ESC to the lowest Baud rate available (50 Baud), and the rest of the
	features will be provided within less than 0.5% overhead.
IBS/SMS	The Tx/Rx path operates in IBS/SMS `Open Network` mode, where a 1/15th
	framing overhead is added to the data. In this mode the Modem is compatible with
	other `Open network` equipment such as the P230, P230D/I, OEM modems used
	with a P1300 framing unit, or other `Open Network` equipment from other
	vendors. Refer to the section "IBS/SMS Service Features" in Appendix F on page
	207 for a full description of IBS/SMS features.
IDR	The Tx path operates in IDR mode, where a 96kbps framing overhead is added
	to the data. In this mode the equipment is compatible with OEM modems used
	with a P1300 framing unit, or other `IDR` equipment from other vendors. Refer to
	section "IDR Service Features" in Appendix F on page 213 for a full description
	of IDR features.

P300H P300 Series Modem Installation and Operating Handbook Page 54