Paradise P300 specifications Menu Screens for Specialist Options, Custom Framing Menus, =IBS 2=IDR

7 MENU SCREENS FOR SPECIALIST OPTIONS

The following sets of menu definitions are shown in this separate section in order not to complicate the earlier section dealing with basic menu operation.

7.1CUSTOM FRAMING MENUS

These features are only available if the `Custom Features` feature is available together with the corresponding IBS or IDR options (standard on P300-TCM). Refer also to the section Closed Network Plus ESC via the Custom Service menu in section 8.7.2 on page 148.

7.1.1Change, Tx/Rx, Service, CUSTOM Menu

If Custom is select from the Change, Tx/Rx, Service menu, this leads to the following dialogue:

	Custom framing based on: [?]
	1=IBS 2=IDR
	Change, Tx/Rx, Service, Custom Menu
IBS	This leads to variants on standard IBS framing (all explained later) which allow for
	operation:
	Without a TS32 multiframe
	Without a backward alarm
	With four backward alarms for Multidestinational IBS
	Minimum overhead mode, where the overhead scales to provide any
	ESC requirement at any data rate.
IDR	This leads to variants on standard IDR framing (again explained later) which allow
	for operation:
	With overheads of 96, 64, or only 32 kbps.
	'With 16kbps ADPCM on the audio channels instead of 32kbps, allowing
	either all normal IDR features in a 64 kbps overhead, or (again utilising
	16kbps ADPCM) 96 kbps overhead with all normal IDR features, but
	including a 32kbps spare channel for continuous BER traffic quality
	monitoring.
	The discussion of IDR this continues after the IBS section in para 7.1.3 on
	page 135.

7.1.2Change, Tx/Rx, Service, Custom, IBS Menu

If IBS is select from the menu above this leads to the following question:

	Multiframe: [?]
	1=Normal 2=Without a TS 32 Multiframe
	Change, Tx/Rx, Service, Custom, IBS, Multiframe Menu
NORMAL	A TS32 Multiframe is used as normal.
NO TS32 MF	No TS32 Multiframe is sent (Tx) or acquired (Rx). This is primarily for operation
	at low rates where the TS32 multiframe becomes long enough to affect
	acquisition time. For example at 32kbps the multiframe lasts 1 second, and hence
	TS32 MF acquisition may take 1 second on top of demod lock time. This selection
	also frees up one additional bit of the overhead (TS32 bit 4) to carry ESC
	information.
	The disadvantage of operating without a TS32 Multiframe is that the synchronous
	IBS scrambler cannot be used, and the `Normal` scrambler option selects

P300H P300 Series Modem Installation and Operating Handbook Page 133