[asterisk-users] Zap difficulties

[John Novack]

Also, unfortunately, Asterisk does NOT listen for dialtone before 
dialing, so these problems will continue until someone sees fir to fix it.
As an aside, for those who pulse dial, rather than DTMF, the "w" will 
not work, as it only works in DTMF

John Novack


Rusty Dekema wrote:
> It's normal to have to wait (under a second in your case) for a dial
> tone from the phone company when seizing a line.
>
> If you were placing a call on a phone directly connected to the phone
> company, the time it takes to physically pick up the phone and move
> your hand to the dial normally takes at least a half a second, giving
> the CO time to start the dial tone and prepare to receive the dialed
> digits.
>
> In the old days, one actually had to listen for the dial-tone before
> dialing, as the phone company equipment would not necessarily be ready
> to receive your digits in 1-2 seconds. With modern electronic
> switches, though, a constant delay of 0.5s - 1.0s should be fine.
>
> -Rusty
>
>
>
> On 8/15/06, Curt Shaffer <cshaffer at gmail.com> wrote:
>> That did help. But can you help me understand why this is needed? I 
>> did not
>> notice any of the other issues you mentioned but I do notice that it 
>> takes
>> an unusually long time to hang up the channel when it is done with 
>> the call.
>> It almost seems like the signaling is not right. I was discussing 
>> this issue
>> with someone offline and from what I understand, the POTS lines are on
>> loopstart. If that is true why do we use koolstart on the zaptel 
>> channel?
>> Just as an experiment I did change the signaling to loopstart but 
>> that did
>> not help either. The biggest issue is that I am in an area where just 
>> about
>> all of the business are using POTS lines exclusively, and adding a 
>> pause to
>> all of these just seems like a hack to me rather than fixing an 
>> issue. I'm
>> not saying this is not my misunderstanding, because it may well be, 
>> but I am
>> just looking for the exact answer.
>>
>> Thanks
>>
>> Curt
>>
>> -----Original Message-----
>> From: asterisk-users-bounces at lists.digium.com
>> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Eric
>> "ManxPower" Wieling
>> Sent: Tuesday, August 15, 2006 12:36 AM
>> To: Asterisk Users Mailing List - Non-Commercial Discussion
>> Subject: Re: [asterisk-users] Zap difficulties
>>
>> Curt Shaffer wrote:
>> > I am having a weird issue with my zap channel (Digium TDM01B). 
>> Randomly it
>> > appears that the POTS line is not seeing all of the digits passed. 
>> We have
>> > to dial a 1 and the area code to call most numbers here, and we get 
>> the
>> > error that we need to dial a 1 and the area code when dialing this 
>> number
>> > even though we are dialing it. Also when I dial 8xx numbers it 
>> never works
>> > (same error). I do have all of those set up as allowed and routing
>> properly
>> > from the dial plan and I can test that by switching to a VoIP 
>> termination
>> > and the calls go through without a hitch. I can also dial these 
>> numbers
>> fine
>> > if I hook a POTS phone directly to the cable that connects to the 
>> Digium
>> > card. Asterisk looks as if it is passing the digits,
>> > (ZAP/g0/18003569377|120|r) for example.
>>
>> Dial(ZAP/g0/w18003569377|120)
>>
>> This will put a .5 second wait before dialing to allow the telco
>> equipment to get ready to receive DTMF.
>>
>> Have you noticed other issues like, even when calling busy numbers, you
>> hear a ringing tone for about 5.5 seconds before you hear a busy tone?
>> That's because you are using the "r" option to Dial.
>>
>>
>> -- 
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>> Chattanooga, and Montgomery.
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