Following either of these selections, the Modem counts how many timeslots are being accessed and determines how to maintain the Timeslot identity. Refer to the section on "Timeslot Identity Maintenance" in Appendix F on page 208. Wherever possible the Modem resolves the issues itself, but where there might be a compatibility issue between different modem vendors the modem prompts the operator for input.

If operating with a G.732 bearer and CAS is selected, then the timeslot identity will be maintained by the satellite CAS Multiframe used to convey the CAS signalling. No user input is required

If operating with a T1-D4or T1-ESFbearer and RBS is selected, then the modem will maintain the Timeslot (and RBS) identity using the normal TS32 Multiframe if possible, and if not it will activate

'a satellite CAS multiframe to support the RBS. No user input is required

If no signalling (CAS or RBS) are active, then the Modem will maintain the timeslot identity by using the satellite TS32 multiframe where possible (unless N, the number of dropped/inserted timeslots falls into the category of `Odd values of N`). It will indicate as follows to which the operator just answers YES to accept the information:

TS identity will be maintained over satellite by TS32 Multiframe (YES)

Change, Tx/Rx, Baseband, Drop/Insert, Ident Menu

If no signalling (CAS or RBS) is active and the value of `N` of dropped and inserted timeslots falls

'

into the category of `Odd values of N`, then it is not possible to maintain the timeslot identity using

 

 

the satellite TS32 multiframe. The `Odd values of N` are

 

 

N = 7, 9, 11, 13, 14, 17, 18, 19, 21, 22, 23, 25, 26, 27, 28, 29, 31

 

If this is the case and the Extended D/I feature is available (standard P300-TCM) then the modem

 

prompts to see if timeslot ID maintenance is required:

 

 

 

 

 

 

TS identity over satellite: [?]

 

 

 

1=Normal (maintain) 2=Don’t care

 

 

 

 

 

 

 

 

 

 

 

Change, Tx/Rx, Baseband, Drop/Insert, Maint' Menu

NORMAL

 

 

(MAINTAIN)

The Modem will activate the satellite CAS multiframe in order to provide timeslot

 

 

ID maintenance for the `Odd value of N` selected. Note that this mode may not

 

 

be compatible with other manufacturers IBS/SMS equipment, as this is a special

 

 

feature of the P300 and P400 series modems (which is why it asks you the

 

 

question, instead of just getting on with it !).

DON'T CARE

Timeslot ID will not be maintained and the Modem will be compatible with other

 

 

manufacturers equipment for these `Odd values of N`.

This is the end of the Drop/Insert dialogue when in Closed Net Plus ESC, IBS or CUSTOM IBS modes

P300H

P300 Series Modem Installation and Operating Handbook

Page 61

Page 61
Image 61
Paradise P300 specifications =Normal maintain 2=Don’t care, Normal Maintain, Dont Care