Aura 6.2 fax / modem data transfer issues

[1palm]

New Post 1palm (Vendor)
21 Jan 14 19:20



disclaimer:
know nothing about the aura. working with a Avaya tech. I am at CO where we provide two NI-2 PRIs over separate transports (one SONET, one copper).

trouble:
fax and credit-card calls originate from analog lines behind the aura. calls are answered at far end then ultimately dropped without any data having passed between end points. q931 and ISUP pieces appear fine, voice works fine. am told the aura is rls 6.2 e/w g450s. Wanting to verify this box is set up correctly to handle-pass fax / modem.

questions:
1) tech has provided "LIST TRACE" which includes the following. am concerned that am seeing anything related to g729 here when this is a ccard, ie, data (modem) and fax calls.
2) the tech says the aura 'Server Codecs" as found in 'display ip-codec-set' are:
1: g729a,
2: g711mu,
3: g711a.
have plenty of pipe/bandwidth, why bother w g729a that could affect fax/modem? techs says this is the setting for every gateway.
also this is a North America site, why include g711a at all?
are these ordered by priority or simply capabilities? if these are capabilities what determines that g729a takes priority over the others listed?
3) the tech says the "Fax settings" are FAX: t.38-standard,,, Modem: off,,, TDD/TTY: US,,, and Clear-channel: n.
should I see t.38 in the LIST TRACE (or what does "fax:Relay" mean in the LIST TRACE)?
should not modem be set to 'on' for any credit card dial up verifications?
the PRIs I provide are clear channel, should not this setting be 'y'?
4) are there any other available tools that should be used in trouble shooting this issue?

11:46:57 TRACE STARTED 01/21/2014 CM Release String cold-02.0.823.0-20763
11:51:03 active station 6857 cid 0x220c
11:51:07 dial 91800888 routeREFIX|FNPA|ARS
11:51:07 term trunk-group 1 cid 0x220c
11:51:08 G729A ssff ps:20 - IGC created
rgn:1 [1.2.3.28]:2070 (GW4)
rgn:1 [1.2.3.25]:2110 (GW1)
11:51:08 xoip options: fax:Relay modemff tty:US (igc)
xoip ip: [1.2.3.28]:2070
11:51:08 xoip options: fax:Relay modemff tty:US (igc)
xoip ip: [1.2.3.25]:2110
11:51:08 dial 918008881234 routeREFIX|FNPA|ARS
11:51:08 route-pattern 2 preference 1 location 1/ALL cid 0x220c
11:51:08 seize trunk-group 1 member 46 cid 0x220c
11:51:08 Setup digits 18008881234

 

[redphone]

1) The call will first be setup as a voice call and convert to a data call once tones are detected. It is ok to see g.729 at first, but later on in the trace something like "Tone Det T38 Fax" should show up for a fax call.

2) Not sure why g.729a is listed especially if this gateway is only used for analog fax/modem calls. But they may have a need/want for g.729 for inter-gateway calling. The codecs are listed in priority order, so g.729a is chosen first.

3) The trace provided only shows the first part of the call, there should be more to it than what is shown. As stated previously, the call is first setup as a voice call and changes codecs after tones are detected. The "fax:Relay" shown in the trace above just shows how the network region is set up.

4) MST is another tool that can be used, or a simple "status station" while the data call is active may show what codec is being used.

Other thoughts, Modem=off means treat the call like a normal voice call if modem tones are detected (ANSam). So with G.729a as the first codec choice, the modem will be setup with this codec. That's bad. It should be set to pass-through. Also, the PRI comes in on one gateway and the analog device is on another gateway, so Clock Sync over IP needs to be properly setup. More info on CSoIP here: Link