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oza.4h07 at gmail.com
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 Posted: Tue Feb 04, 2014 11:55 am Post subject: [asterisk-users] How to Busy signals on DAHDI |
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Hello,
On a Asterisk 1.6.1 powered system, I've just discovered that using Busy() application in dialplan was no enough to send a Busy signal on incoming Dahdi channel.
On this specific install, adding an Answer()) and a Playtone() statement in dialplan triggered sending of busy tone but I'm still surprised by my findings.
Should I expect public switch to send a Busy tone to caller whenever Asterisk triggers Busy app or did I miss something ?
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rmudgett at digium.com
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| Posted: Tue Feb 04, 2014 12:21 pm Post subject: [asterisk-users] How to Busy signals on DAHDI |
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On Tue, Feb 4, 2014 at 10:56 AM, Olivier <oza.4h07@gmail.com (oza.4h07@gmail.com)> wrote:
| Quote: | Hello,
On a Asterisk 1.6.1 powered system, I've just discovered that using Busy() application in dialplan was no enough to send a Busy signal on incoming Dahdi channel.
On this specific install, adding an Answer()) and a Playtone() statement in dialplan triggered sending of busy tone but I'm still surprised by my findings.
Should I expect public switch to send a Busy tone to caller whenever Asterisk triggers Busy app or did I miss something ?
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It depends upon what kind of DAHDI channel. If it is an analog FXS/FXO port then
you have to answer for the busy tone to be heard by the caller because as far as the
telco is concerned it delivered a call to a non-busy line. If it is an ISDN
channel then it depends upon what you have the priindication option set to. With
priindication=outofband then a busy cause code is sent to the network and the call
is hung up. With priindication=inband then a busy tone is sent after a possible
PROGRESS message.
Richard |
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oza.4h07 at gmail.com
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| Posted: Wed Feb 05, 2014 2:41 am Post subject: [asterisk-users] How to Busy signals on DAHDI |
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2014-02-04 Richard Mudgett <rmudgett@digium.com (rmudgett@digium.com)>:
| Quote: |
On Tue, Feb 4, 2014 at 10:56 AM, Olivier <oza.4h07@gmail.com (oza.4h07@gmail.com)> wrote:
| Quote: | Hello,
On a Asterisk 1.6.1 powered system, I've just discovered that using Busy() application in dialplan was no enough to send a Busy signal on incoming Dahdi channel.
On this specific install, adding an Answer()) and a Playtone() statement in dialplan triggered sending of busy tone but I'm still surprised by my findings.
Should I expect public switch to send a Busy tone to caller whenever Asterisk triggers Busy app or did I miss something ?
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It depends upon what kind of DAHDI channel. If it is an analog FXS/FXO port then
you have to answer for the busy tone to be heard by the caller because as far as the
telco is concerned it delivered a call to a non-busy line.
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That makes sense.
Then I'm wondering if playing a Busy tone is enough to let Caller's telco or device ask for automatic redial.
I think this feature is only available ISDN or equivalent networks.
| Quote: | If it is an ISDN
channel then it depends upon what you have the priindication option set to. With
priindication=outofband then a busy cause code is sent to the network and the call
is hung up. With priindication=inband then a busy tone is sent after a possible
PROGRESS message.
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Thank you very much for sharing this.
I'm gonna check what's really happening from caller's perspective when such parameter is set.
I would expect a busy tone (and the opportunity for automatic redialing).
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iax at keybits.org
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| Posted: Thu Feb 06, 2014 5:07 am Post subject: [asterisk-users] How to Busy signals on DAHDI |
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Il 05/02/2014 8.42, Olivier ha scritto:
| Quote: | channel then it depends upon what you have the priindication option
set to. With
priindication=outofband then a busy cause code is sent to the
network and the call
is hung up. With priindication=inband then a busy tone is sent
after a possible
PROGRESS message.
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| Quote: | I'm gonna check what's really happening from caller's perspective when
such parameter is set.
I would expect a busy tone (and the opportunity for automatic redialing).
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Sending a busy signalling on D channel (priindication=outofband) will go
back into the telephone network exactly the same way the called party
was really busy... so no charge, busy tone, not completed call on the
caller side.
Just a couple of notes about priindication=inband.
- Usually sending in-band audio on a "not connected" state is not
allowed unless a special setup is done by the isdn provider.
- While sending in-band audio or busy signalling on D channel will make
no difference (from the caller perspective) if the call is originated
from an analog pstn line anything else (gsm->isdn, sip->isdn...) will
fail to get a proper state for that call.
Definitely I will never use it unless it is required, like the mandatory
price information message to be sent **before** connection if you run a
"value added" incoming service billed to the caller.
--
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http://code.google.com/p/teebx/
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