[Freeswitch-users] DAHDI Dial 9 Receiving Setup Acknowledge

[Ryan Wagoner]

Sorry this was meant for the Asterisk list. I wish FreeSWITCH had QSIG
support so I could go that route.

Ryan

On Mon, Sep 14, 2009 at 3:46 PM, Ryan Wagoner <rswagoner at gmail.com> wrote:
> I have a Toshiba PBX connected via a QSIG PRI to Asterisk. I can make
> calls from the Toshiba to Asterisk and internal calls from Asterisk to
> the Toshiba. What I can't do is make an call with an outside
> destination from Asterisk to the Toshiba. The Toshiba is looking for 9
> to grab an outside line then it expects to see the 10 digits. In the
> FreePBX dial plan I use 9|. which sends 9 plus the 10 digit number.
>
> Using Wireshark to look at the QSIG commands coming from a Sangoma
> wanpipemon trace I see the following for an Asterisk to Toshiba
> internal call.
>
> Asterisk -> SETUP
> Toshiba -> CALL PROCESSING
> Toshiba -> CONNECT
> Asterisk -> CONNECT ACKNOWLEDGE
>
> However when trying to dial 9 + number I received the following
>
> Asterisk -> SETUP
> Toshiba -> SETUP ACKNOWLEDGE
>
> Looking at http://tools.ietf.org/html/rfc4497 I see the following
>
>   On receipt of a QSIG SETUP message containing no Sending complete
>   information element and a number in the Called party number
>   information element that the gateway cannot determine to be complete,
>   the gateway SHALL send back a QSIG SETUP ACKNOWLEDGE message, start
>   QSIG timer T302, and await further number digits.
>
>   Otherwise, the gateway SHALL wait for more digits
>   to arrive in QSIG INFORMATION messages.
>
> Looking in the chan_dahdi.c code I see
>
>                        case PRI_EVENT_SETUP_ACK:
>                                chanpos = pri_find_principle(pri,
> e->setup_ack.channel);
>                                if (chanpos < 0) {
>                                        ast_log(LOG_WARNING, "Received
> SETUP_ACKNOWLEDGE on unconfigured channel %d/%d span %d\n",
>
> PRI_SPAN(e->setup_ack.channel), PRI_CHANNEL(e->setup_ack.channel),
> pri->span);
>                                } else {
>                                        chanpos =
> pri_fixup_principle(pri, chanpos, e->setup_ack.call);
>                                        if (chanpos > -1) {
>
> ast_mutex_lock(&pri->pvts[chanpos]->lock);
>
> pri->pvts[chanpos]->setup_ack = 1;
>                                                /* Send any queued digits */
>                                                for (x = 0;x <
> strlen(pri->pvts[chanpos]->dialdest); x++) {
>                                                        ast_debug(1,
> "Sending pending digit '%c'\n", pri->pvts[chanpos]->dialdest[x]);
>
> pri_information(pri->pri, pri->pvts[chanpos]->call,
>
> pri->pvts[chanpos]->dialdest[x]);
>                                                }
>
> ast_mutex_unlock(&pri->pvts[chanpos]->lock);
>                                        } else
>                                                ast_log(LOG_WARNING,
> "Unable to move channel %d!\n", e->setup_ack.channel);
>                                }
>                                break;
>
> How do I get Asterisk to queue these digits so DAHDI can send them in
> response to the SETUP ACKNOWLEDGE message. What should be happening is
> Asterisk sends 9 via the SETUP message, waits for the SETUP
> ACKNOWLEDGE, then send the 10 digits number via a INFORMATION message.
>
> Ryan
>