Receiving fax through SPA3102

[Informatics]

We are unable to receive faxes from an external source to our 3cx system.

Our configuration is Phone line -> SPA3102 -> 3CX

I have configured a PSTN device in 3cx and set it to send fax to email of extension 888. We do not need to send faxes from this line, only receive them. I have been working with linksys and according to them the SPA3102 configuration looks correct. In the SPA3102 on the PSTN line tab i have this configuration:
network Jitter = Very High
Jitter Buffer = Disable
Silence Supp enable = No
Echo Canc Enable = No
Echo Canc Adapt Enable = Yes
Echo Supp Enable = No
Fax CED Detect Enable = Yes
Fax CNG Detect Enable = Yes
Fax Passthru Codec = G711u
Fax Codec Symmetric = Yes
Fax PassThru Method = ReINVITE
Fax Process NSE= Yes
Fax Disable Ecan = No

The 3cx system is answering the call, but immediately hanging up. Here is part of the log for a call:

11:48:03.781 [CM503008]: Call(142): Call is terminated
11:48:03.656 Remote SDP is set for legC:142.2
11:48:02.265 Session 49474 of leg C:142.1 is confirmed
11:48:02.171 [CM503007]: Call(142): Device joined: sip:[email protected]:5100;user=phone
11:48:02.171 [CM503007]: Call(142): Device joined: sip:[email protected]:5062
11:48:02.171 [MS210007] C:142.1:Answer provided. Connection(by pass mode): 192.168.0.5:10002(10003)
11:48:02.156 [MS210001] C:142.2:Answer received. RTP connection[unsecure]: 192.168.0.5:10002(10003)
11:48:02.156 Remote SDP is set for legC:142.2
11:48:02.156 [CM503002]: Call(142): Alerting sip:[email protected]:5100;user=phone
11:48:02.125 [CM503025]: Call(142): Calling @[Dev:sip:[email protected]:5100;user=phone]
11:48:02.125 [MS210006] C:142.2:Offer provided. Connection(by pass mode): 192.168.0.8:16388(16389)
11:48:02.093 [CM503004]: Call(142): Route 1: @[Dev:sip:[email protected]:5100;user=phone]
11:48:02.093 [CM503010]: Making route(s) to <sip:[email protected]:5060;user=fax>
11:48:02.093 [MS210000] C:142.1:Offer received. RTP connection: 192.168.0.8:16388(16389)
11:48:02.078 Remote SDP is set for legC:142.1
11:48:02.078 [CM505002]: Gateway:[363-0403] Device info: Device Identified: [Man: Linksys;Mod: SPA Series;Rev: General] Capabilities:[reinvite, no-replaces, able-no-sdp, recvonly] UserAgent: [Linksys/SPA3102-5.1.10(GW)] PBX contact: [sip:[email protected]:5060]
11:48:02.078 [CM503001]: Call(142): Incoming call from 10002@(Ln.10002@363-0403) to <sip:[email protected]:5060;user=fax>
11:48:02.062 [CM503012]: Inbound office hours rule (unnamed) for 10002 forwards to Fax:888
11:48:02.062 Looking for inbound target: called=10002; caller=10002
11:48:02.046 [CM500002]: Info on incoming INVITE:
INVITE sip:[email protected] SIP/2.0
Via: SIP/2.0/UDP 192.168.0.8:5062;branch=z9hG4bK-64c2c3f4
Max-Forwards: 70
Contact: "10002"<sip:[email protected]:5062>
To: <sip:[email protected]>
From: "10002"<sip:[email protected]>;tag=b3489d1b5cd787co1
Call-ID: [email protected]
CSeq: 102 INVITE
Expires: 240
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
Proxy-Authorization: Digest username="10002",realm="3CXPhoneSystem",nonce="414d535c02d8e8c159:d21a164878215b7988bd2a86885eec7b",uri="sip:[email protected]",algorithm=MD5,response="71a56ec14561c9e3326ef9c605bd1db4"
Supported: x-sipura, replaces
User-Agent: Linksys/SPA3102-5.1.10(GW)
Content-Length: 0
Remote-Party-ID: 10002 <sip:[email protected]>;screen=yes;party=calling


Also, here is what i believe to be the relevant part of a packet trace

INVITE sip:[email protected]:5062 SIP/2.0
Via: SIP/2.0/UDP 192.168.0.5:5060;branch=z9hG4bK-d8754z-69363b179834630e-1---d8754z-;rport
Max-Forwards: 70
Contact: <sip:[email protected]:5060>
To: "10002"<sip:[email protected]>;tag=be4a522d761daaa0o1
From: <sip:[email protected]>;tag=8e6e5b26
Call-ID: [email protected]
CSeq: 2 INVITE
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REGISTER, SUBSCRIBE, NOTIFY, REFER, INFO, MESSAGE
Content-Type: application/sdp
Supported: replaces
User-Agent: 3CXPhoneSystem 9.0.13530.0
Content-Length: 297

v=0
o=3cxPS 298114351104 549437046786 IN IP4 192.168.0.5
s=3cxPS Audio call
c=IN IP4 192.168.0.5
t=0 0
m=image 10000 udptl t38
a=T38FaxVersion:0
a=T38MaxBitRate:14400
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxBuffer:10500
a=T38FaxMaatagram:1500
a=T38FaxUdpEC:t38UDPRedundancy
SIP/2.0 488 Not Acceptable Here
To: "10002"<sip:[email protected]>;tag=be4a522d761daaa0o1
From: <sip:[email protected]>;tag=8e6e5b26
Call-ID: [email protected]
CSeq: 2 INVITE
Via: SIP/2.0/UDP 192.168.0.5:5060;branch=z9hG4bK-d8754z-69363b179834630e-1---d8754z-
Contact: 10002 <sip:[email protected]:5062>
Warning: 304 spa "Media type not available"
Server: Linksys/SPA3102-5.1.10(GW)
Content-Length: 0

ACK sip:[email protected]:5062 SIP/2.0
Via: SIP/2.0/UDP 192.168.0.5:5060;branch=z9hG4bK-d8754z-69363b179834630e-1---d8754z-;rport
Max-Forwards: 70
To: "10002"<sip:[email protected]>;tag=be4a522d761daaa0o1
From: <sip:[email protected]>;tag=8e6e5b26
Call-ID: [email protected]
CSeq: 2 ACK
Content-Length: 0

BYE sip:[email protected]:5062 SIP/2.0
Via: SIP/2.0/UDP 192.168.0.5:5060;branch=z9hG4bK-d8754z-6a54451566487f54-1---d8754z-;rport
Max-Forwards: 70
Contact: <sip:[email protected]:5060>
To: "10002"<sip:[email protected]>;tag=be4a522d761daaa0o1
From: <sip:[email protected]>;tag=8e6e5b26
Call-ID: [email protected]
CSeq: 3 BYE
User-Agent: 3CXPhoneSystem 9.0.13530.0
Reason: SIP;description="Application Rejected Sdp(usually no common codec)"
Content-Length: 0


Has anyone been able to get this type of configuration to work? If any more information is required, just let me know.

Any help will be greatly appreciated. Thanks.

 

[RichardCrabb1]

Have you set T.38 enable to yes? This links gives the detail of how to configure a 3102 for FAX http: //www.3cx.com/sip-phones/linksys-spa-3102-fax/ No longer available. New link: http://www.3cx.com/sip-phones/

Does that help?

Richard Crabb

 

[Informatics]

Thanks for the quick reply.

I have reviewed that document before, and as far as I can tell, this document is just for sending faxes through Line 1. We do not need to send faxes. We only need to receive faxes through the PSTN line, so I currently have line 1 disabled.

Correct me if I am wrong with this configuration, but as far as I can tell, I shouldn't have to use Line 1 just to receive faxes.

Any other idea's?

Thanks

 

[leejor]

There is a FAX enable T38 in the PSTN Line tab, is that set to yes? I would also try changing (playing with) the FAX Passthru Method and the FAX Disable ECAN. This feature ( F D E) turns off the echo canceller if a fax tone is detected, when set to yes.
Also check the FAX Tone detect Mode, it should be caller or callee or caller only.

 

[Informatics]

On the PSTN line tab I do not have the FAX Enable T38 or the FAX Tone Detect Mode options. I do however have them on the Line 1 tab.

Just for reference I am running Software Version: 5.1.10(GW) and Hardware Version: 1.4.5(a) on the SPA3102.

I'll see what happens when I set FAX Disable ECAN to YES though.

Thanks for the help.

 

[leejor]

If you don't have the Linksys Admin guide, you should be able to get it here. http://www.belldandy.idv.hk/wordpress/index.php/2010/04/linksys-ata-pdf/

 

[bluetel2]

Hi all,

i have exactly this same scenario. anybody found solution ?

 

[matthewt]

Hi,
Have you tried turning windows firewall off? That can block the port which 3CX uses for Fax to E-mail

 

[bluetel2]

Hi,
Have you tried turning windows firewall off? That can block the port which 3CX uses for Fax to E-mail

hi tks for your reply,

it's not firewall problem. i found why

https://supportforums.cisco.com/thread/ ... tstart=135