asterisk users - Nov 2003 - configuring DID trunks

I am trying to turn up DID trunks with our local phone company but do 
not know the correct format of extensions.conf to do this.

On Thu, 2003-11-06 at 11:33, Don Pobanz wrote:
> I am trying to turn up DID trunks with our local phone company but do 
> not know the correct format of extensions.conf to do this.
> 
> >From extensions.conf
> [coDID]
> exten => s,1,Answer
> 
> The above answers the line immediately but the telco needs a wink 
> first. So, I removed this line altogether. The wink then worked as 
> expected but when the telco dialed one of our DID numbers, asterisk 
> replied that it was not a valid number and the message "Unknown 
> extension 's' " was on my console so I guess I need the s
extension.
> 
> Does someone have an example of DID trunk configuration to share?
You need to have an exten entry that matches the number of digits the
telco is sending. You should be able to see this vrom the CLI with a
couple of verbose flags.

When we had a E&M wink T1, the telco sent 4 digits of the phone number,
This meant our exten line looked like;
exten => 9004,1,answer

Now we have a PRI with full 10 digits passed and have the following
exten entry;

exten => 6152389004,1,answer


-- 
Steven Critchfield  <critch@basesys.com>

Success at last!!! See below for details.

On Thursday, November 06, 2003 1:16 PM, Steven Critchfield 
[SMTP:critch@basesys.com] wrote:
> You need to have an exten entry that matches the number of digits the
> telco is sending. You should be able to see this vrom the CLI with a
> couple of verbose flags.
>
> When we had a E&M wink T1, the telco sent 4 digits of the phone
> number,
> This meant our exten line looked like;
> exten => 9004,1,answer
>
> Now we have a PRI with full 10 digits passed and have the following
> exten entry;
>
> exten => 6152389004,1,answer
After much more investigation, I found another thing that needs to be 
set.

The symptoms that I had was that I did not receive any digits from the 
telco. The telco is sending them out dtmf. (I know they are being sent 
because the telco technician had an audio monitor on the trunk and we 
could hear the dtmf). However, asterisk never sees any digits, though 
it does wink and answer the line. Asterisk then uses the 's' state from 
extensions.conf.

1. In zapata.conf immediate=no is needed. If immediate=yes then the 
line will be answered and the extension determined before the telco has 
time to send the digits.

Here are portions of my config files:

zaptel.conf
span=1,0,0,esf,b8zs
span=2,1,2,esf,b8zs
# span 2 is my telco span.
fxsks=1-8
fxoks=9-24
e&m=25-28
# set up the first 4 trunks for DID
loadzone = us
defaultzone=us

zapata.conf
context = coDID
group=3
callerid = "DID trunk <555-1212>"
signalling=em_w
channel=> 25-28

extensions.conf
[coDID]
exten => 5551200,1,Answer
exten => 5551200,2,Wait,1
exten => 5551200,3,BackGround(HU-welcome)

exten => 5551212,1,Answer
exten => 5551212,2,Dial(Zap/10,18)
exten => 5551212,3,Voicemail2,us212
exten => 5551212,103,Voicemail2,b212

Don Pobanz