Paradise P300 TS identity over satellite ? =Maintain 2=Don’t care Normal, Dont, Audio

If the Modem is in CUSTOM IDR mode (low rate format) then it is possible to maintain the Timeslot ID even with an IDR overhead structure. Refer to the section "Timeslot identity maintenance" in Appendix F on page 208 if a refresh is required. Note that this is only offered under Custom IDR to simplify normal IDR menu operation, but Custom IDR can be selected with all the possible custom features set to `Normal` to allow normal IDR operation, but with timeslot ID maintenance. Note that for low rate IDR carriers (<1544kbps) INTELSAT specify the IBS overhead structure, but the Modem can operate the IDR 96kbps overhead (and use Drop/Insert) even down to 64kbps.

If the Modem is in CUSTOM IDR mode (low rate format) then the following prompt is displayed:

q
		TS identity over satellite: [?]
		1=Maintain 2=Don’t care (Normal)
		Change, Tx/Rx, Baseband, Drop/Insert, IDR Maint' Menu
	MAINTAIN	The dropped/inserted timeslots will be aligned in the satellite IDR frame in order
		to maintain the timeslot identity.
	DON'T	The dropped/inserted data will be arbitrarily placed in the satellite IDR frame and
		the identity of the timeslots will not be maintained (as with normal IDR).

6.6.6Change, Tx/Rx, Baseband, OTHER Menu

If the IDR option is fitted (standard on P300-IDR and above) then the modem can generate a 64kbps carrier comprising just of two 32kbps ADPCM audio channels, or a 128kbps carrier comprising 64kbps data (from the main data interface of the modem) plus two 32kbps ADPCM audio channels. These modes are effectively an emulation of and are compatible with the popular P1348/P1448 voice/data mux card used often in SNG applications. The choice between which mode is made on the following menu:

	Voice/Data mux (P1348/P1448 emulation): [?]
	1=Audio 2=Audio+64k Data
	Change, Tx/Rx, Baseband, Other Menu
AUDIO	A 64kbps data stream is generated from the two 32kbps ADPCM audio ports
	normally used for the IDR Audio ESC function. Closed Net Plus ESC, IBS or
	Custom IBS overhead is required in order to maintain the octet alignment (part of
	timeslot ID maintenance) in order for this to function.
	On the Tx path the clock mode is forced to internal, and on the Rx mode the clock
	mode is forced to satellite (as the terrestrial interface is audio only there are no
	clocking issues).

AUDIO+DATA A 128kbps data stream is generated, 64kbps from the two 32kbps ADPCM audio ports normally used for the IDR Audio ESC function plus 64kbps from the main data port. Closed Net Plus ESC, IBS or Custom IBS overhead is required in order to maintain the timeslot ID and hence keep the channels separate in order for this to function. Normal clocking selections are available.

P300H P300 Series Modem Installation and Operating Handbook Page 62