[Asterisk-Users] UK ISDN2e with DDI?

[John Daragon]

David Cook wrote:
>>-----Original Message-----
>>From: asterisk-users-bounces at lists.digium.com 
>>[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Dogers
>>Sent: 07 December 2005 16:24
>>To: john at argv.co.uk; Asterisk Users Mailing List - 
>>Non-Commercial Discussion
>>Subject: Re: [Asterisk-Users] UK ISDN2e with DDI?
>>
>>Quoting John Daragon <john at argv.co.uk>:
>>
>>
>>>Patrick Lidstone (Personal E-mail) wrote:
>>>
>>>>>We're about ready to go ahead with a nice 6 line (maybe later
>>>>>8) ISDN setup with Asterisk at Home and the quad Junghanns card.
>>>>>
>>>>>Before we do, could anyone confirm for me that BT's 
>>
>>ISDN2e lines do 
>>
>>>>>actually provide Asterisk with the DDI number? We need to 
>>
>>be able to 
>>
>>>>>route incoming calls based on which number is ringing.
>>>
>>>Yes they do. For DDI ranges you'll need to ask BT for a 
>>
>>"System Access"
>>
>>>installation (sometimes known as "Point-to-Point") and 
>>
>>configure the 
>>
>>>Junghanns appropriately.
>>
>>I'll have to check that, I guess - find out what they're set as!
>>
>>
>>>I'm probably just an old fogey with a programming background, but I 
>>>find straight Asterisk *so* much easier to configure than a at h.
>>
>>True, I've used bare Asterisk at home for my small get up, 
>>but A at H just does everything we need it to do here at the 
>>office (including the "nice and pretty"
>>call log side of things that AMP provides!)
>>
>>
>>>When you say "ringtones", do you mean "sounds like a UK 
>>
>>phone when it 
>>
>>>rings", or "sounds like a UK phone when we ring someone else" ?
>>
>>It does actually sound okay when we ring someone else, but 
>>when it rings, it has the long single american style ring. 
>>I've come across a few places that claim its built into the 
>>Grandstream and I'd have to create and upload a new one..
>>but I've also found others that say to edit various config 
>>files, which has had no effect (indications.conf and 
>>zaptel.conf both have the zone as uk.. Theres nowhere else it 
>>needs to be set, is there?).
>>
>>Andrew
> 
> 
> Try adding the following to your handset config in sip.conf. 
 > This forces the SIP device to get it's ring tones from
 > Asterisk. Worked for us in v1.0.9 with Polycom handsets.
> 
> progressinband=yes
> 
> Be careful when ordering an ISDN2e line from BT. By default 
 > they come configured as Point-to-Multipoint with any additional
 > numbers as MSNs. Most PBXs are better with ISDN2e Point-to-Point
 > with DDIs, but BT then sting you for a £100 DDI planning fee in
 > addition to the ISDN2e installation. One thing to consider is
 > that DDIs are allocated in contiguous blocks of 10 numbers
 > e.g. 0115 7889100 - 7889109. MSNs however are purposely
 > allocated by BT randomly in what ever quantity you require.
 > Officially you cannot have contiguous MSNs which aren't
 > so good for PBX use.

You described this so much better than I did.  IIRC, the first
10 MSNs are contiguous for point to multipoint. After that all
bets are off.

> If you want inbound CLI display (CLIP) and/or the ability to 
 > specify the outbound number you are presenting as a CLI (
> CLOP/COLP depending on who you are talking to) this needs to 
 > be specified as well. By default you get neither but both are
 > non-charegable upgrades (in our limited experience).

Our recent PTP installations have turned up without CLIP but
with COLP. YMMV, it seems...

jd

-- 

John Daragon                                          john at argv.co.uk
argv[0] limited               (Asterisk implementation & consultancy)
Lambs Lawn Cottage,  Staple Fitzpaine,  Taunton,  TA3 5SL,  UK
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