07-07-2008 01:23 AM - edited 03-15-2019 11:46 AM
Hello, we have a CCM cluster (5.1), with GW 2821 (VWIC2-1MFT-T1/E1). The voice calls are working great, but a fax connected through an ATA can't receive anything because it doesn't recognize as a data transmission. However it can send fax correctly.
The ATA has the las firmware (SCCP 3.2.3), and is registered in the CCM.
Any idea?
Thanks.
Solved! Go to Solution.
07-07-2008 03:25 AM
Your ATA config seems fine. Please Add the following under the voip Dial peer:
fax rate disable
modem passthrough nse codec g711ulaw
07-07-2008 01:28 AM
Hi,
Have you configured
"network-clock-select 1 E1 x/y/z" ?
Without that, fax cannot work correctly.
07-07-2008 01:58 AM
Hola Paolo, I have configured the command "network-clock-select 1 E1 0/0/0" and there is no difference. The disconnect value is 17 (user busy), but the fax receive the call as a voice call.
Thanks.
07-07-2008 02:03 AM
Hola
Fax calls are voice calls. I do not understand why "user busy is returned". If you call from a phone, do you hear the fax answering and the fax tones ?
07-07-2008 02:13 AM
If I call from a phone I hear a tone during few msec. and after only silence. The call is disconnected (cause value 16) after 40 sec. aprox.
Gracias.
07-07-2008 02:38 AM
Check "debug isdn q931" with "term mon". There you should see that a fax call is the same as a voice call.
The only difference might be the bearer capability for fax calls to be "3.1 KHz" instead of "Speech". That should not prevent the call to be routed to the ATA.
07-07-2008 02:51 AM
Here is the output of debug isdn q931 for a fax connection:
*Jul 7 10:48:23.989: ISDN Se0/0/0:15 Q931: RX <- SETUP pd = 8 callref = 0x6300
Bearer Capability i = 0x9090A3
Standard = CCITT
Transfer Capability = 3.1kHz Audio
Transfer Mode = Circuit
Transfer Rate = 64 kbit/s
Channel ID i = 0xA1838F
Preferred, Channel 15
Progress Ind i = 0x8281 - Call not end-to-end ISDN, may have in-band inf
o
Calling Party Number i = 0x2183, 'sssssssss'
Plan:ISDN, Type:National
Called Party Number i = 0xA1, 'ddddddddd'
Plan:ISDN, Type:National
Sending Complete
*Jul 7 10:48:23.997: ISDN Se0/0/0:15 Q931: TX -> CALL_PROC pd = 8 callref = 0x
E300
Channel ID i = 0xA9838F
Exclusive, Channel 15
*Jul 7 10:48:24.169: ISDN Se0/0/0:15 Q931: TX -> ALERTING pd = 8 callref = 0xE
300
*Jul 7 10:48:30.669: ISDN Se0/0/0:15 Q931: TX -> CONNECT pd = 8 callref = 0xE3
00
*Jul 7 10:48:30.713: ISDN Se0/0/0:15 Q931: RX <- CONNECT_ACK pd = 8 callref =
0x6300
*Jul 7 10:48:30.713: %ISDN-6-CONNECT: Interface Serial0/0/0:14 is now connected
to sssssssss N/A
*Jul 7 10:48:33.601: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/
0:14, changed state to up
*Jul 7 10:49:19.289: %ISDN-6-DISCONNECT: Interface Serial0/0/0:14 disconnected
from sssssssss , call lasted 48 seconds
*Jul 7 10:49:19.289: ISDN Se0/0/0:15 Q931: TX -> DISCONNECT pd = 8 callref = 0
xE300
Cause i = 0x8090 - Normal call clearing
*Jul 7 10:49:19.333: ISDN Se0/0/0:15 Q931: RX <- RELEASE pd = 8 callref = 0x63
00
*Jul 7 10:49:19.337: ISDN Se0/0/0:15 Q931: TX -> RELEASE_COMP pd = 8 callref =
0xE300
Everything seems correctly, but it is not working. The fax report says that the incoming call is a voice call and it doesn't print anything.
Gracias.
07-07-2008 02:55 AM
Can you try a different fax machine ?
The next step would be to check the ATA setting as indicated in the "troubleshooting ATA Fax" document.
The further following step would be converting the ATA to H.323.
07-07-2008 02:57 AM
Hello,
is the gateway controlled by MGCP?
Bye
Jo
07-07-2008 03:09 AM
Hello, the gateway is configured wit H323 protocol (not controlled by the CCM). So an incoming call goes to the E1 card (in the 2821 gw), it matchs a DID dial-peer (h323) to the CCM, the CCM makes a translation (from public number to an extension) and then it matchs the internal extension of the fax (in ATA, which is registered as SCCP phone).
This is the ATA config:
LBRCodec 3
AudioMode 0x00350035
ConnectMode 0x90000400
FXSInputLevel -1
FXSOutputLevel -4
The dial-peer:
dial-peer voice 2 voip
description Llamadas entrantes del PRIMARIO
destination-pattern xxxxxxxxx
session target ipv4:yyyyyyyyy
!
dial-peer voice 3 pots
incoming called-number xxxxxxxxx
direct-inward-dial
!
And the translation pattern in CCM:
Translation Pattern: xxxxxxxxx
Called Party Transform Mask: 1828
Thanks.
07-07-2008 03:21 AM
Hi, please try codec, audio and connect modes as indicated at:
07-07-2008 03:25 AM
Your ATA config seems fine. Please Add the following under the voip Dial peer:
fax rate disable
modem passthrough nse codec g711ulaw
07-07-2008 04:48 AM
Hello, it works!!! Thank you very much.
Best regards.
07-14-2008 03:11 AM
Hi, although it seems working fine, many times we receive the fax incomplete. Usually it stops at the middle of the fax.
Thanks.
07-14-2008 03:16 AM
Hi, check "show controllers E1", it must have 0 errors, and 0 slips for fax to work reliably.
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