11-13-2014 12:14 AM - edited 03-13-2019 08:43 PM
hi all,
When I using E1 ISDN PRI on my gateway, what should i use in controller interface
ds0-group
or
pri-group ?
What I know, that for ds0-group, is for E1 / T1 CAS, pri-group is for E1 /T1 isdn pri.
is it correct?
and, are it the same for E1 ISDN PRI with E1 CCS?
thanks,
Jerri
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11-13-2014 01:30 AM
Yes Jerri, you are correct. Use pri-group for E1/T1 ISDN.
11-13-2014 01:36 AM
CCS is called common channel signalling. This is what ISDN uses. It uses a single channel called the D channel to carry the signalling for the whole circuit. CAS (channel associated signalling) carries signalling information in the bearer channel.
So yes E1 ISDN PRI uses CCS
11-13-2014 01:30 AM
Yes Jerri, you are correct. Use pri-group for E1/T1 ISDN.
11-13-2014 01:32 AM
Hi Ayodeji,
Thanks for the respond.
and, are it the same for E1 ISDN PRI with E1 CCS?
11-13-2014 01:36 AM
CCS is called common channel signalling. This is what ISDN uses. It uses a single channel called the D channel to carry the signalling for the whole circuit. CAS (channel associated signalling) carries signalling information in the bearer channel.
So yes E1 ISDN PRI uses CCS
11-18-2014 10:08 PM
Hi Ayodeji,
One more question,
why in E1 CAS,
the command for timeslot is
ds0-group timeslot 1-15,17-31 type xxx?
as we know that, CAS, using robbed bit signaling.
why not
ds0-group timeslot 1-31 type xxx for the CAS?
and,
as far as I know, timeslot 1st for framing, why timeslot 1st, included in
ds0-group command
Thanks,
Jerri
11-26-2014 02:45 AM
Jerri,
E1 CAS is not my forte! I know almost nothing about it. You can check online to see if you find answers to this..
11-25-2014 08:34 PM
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Hi Ayodeji,
One more question,
why in E1 CAS,
the command for timeslot is
ds0-group timeslot 1-15,17-31 type xxx?
as we know that, CAS, using robbed bit signaling.
why not / what is the different between
ds0-group timeslot 1-31 type xxx for the E1 CAS?
and,
as far as I know, timeslot 1st for framing, why timeslot 1st, included in
ds0-group command
Thanks,
Jerri