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Receiving Fax CRC issue - Gateway H323

Hello,

I am encountering a Fax CRC issue with the following H323 config in the Luxembourg:

Cisco 2851:

  • Cisco IOS Software, 2800 Software (C2800NM-IPVOICEK9-M), Version 12.4(20)T2
  • 2 Channelized/Clear E1/PRI ports
  • 4 Voice FXS interfaces

The port 0/2/0 of the FXS is configured to be connect to a Fax Machine. Outgoing faxes are ok, but for incoming faxes, the CRC for sending complete is never sent to the remote fax even if all pages are correctly received. Pkase find a trace:

*Jan  8 14:02:07.489: ISDN Se0/0/1:15 Q931: RX <- SETUP pd = 8  callref = 0x136F
Sending Complete
Bearer Capability i = 0x8090A3
  Standard = CCITT
  Transfer Capability = Speech 
  Transfer Mode = Circuit
  Transfer Rate = 64 kbit/s
Channel ID i = 0xA9839B
  Exclusive, Channel 27
Progress Ind i = 0x8583 - Origination address is non-ISDN 
Calling Party Number i = 0x0080, '0033492946799'
  Plan:Unknown, Type:Unknown
Calling Party Number i = 0x0083, '0033492946700'
  Plan:Unknown, Type:Unknown
Called Party Number i = 0xC1, '26423233'
  Plan:ISDN, Type:Subscriber(local)
*Jan  8 14:02:07.489: ISDN Se0/0/1:15 Q931: Received SETUP  callref = 0x936F callID = 0x00CC switch = primary-net5 interface = User
*Jan  8 14:02:07.505: ISDN Se0/0/1:15 Q931: TX -> CALL_PROC pd = 8  callref = 0x936F
Channel ID i = 0xA9839B
  Exclusive, Channel 27
*Jan  8 14:02:07.509: ISDN Se0/0/1:15 Q931: TX -> PROGRESS pd = 8  callref = 0x936F
Progress Ind i = 0x8188 - In-band info or appropriate now available
*Jan  8 14:02:16.945: ISDN Se0/0/1:15 Q931: TX -> CONNECT pd = 8  callref = 0x936F
Progress Ind i = 0x8182 - Destination address is non-ISDN
*Jan  8 14:02:16.985: ISDN Se0/0/1:15 Q931: RX <- CONNECT_ACK pd = 8  callref = 0x136F
*Jan  8 14:02:16.985: %ISDN-6-CONNECT: Interface Serial0/0/1:26 is now connected to 0033492946799 N/A
*Jan  8 14:02:16.985: %ISDN-6-CONNECT: Interface Serial0/0/1:26 is now connected to 0033492946799 N/A
*Jan  8 14:02:16.985: %ISDN-6-CONNECT: Interface Serial0/0/1:26 is now connected to 0033492946799 N/A
*Jan  8 14:02:22.805: 0/0/1:15  153643587 fr-entered=10(ms)
*Jan  8 14:02:22.985: %ISDN-6-CONNECT: Interface Serial0/0/1:26 is now connected to 0033492946799 N/A
    timestamp=153644877 fr-msg-tx NSF
    timestamp=153645227 fr-msg-tx CSI
    timestamp=153645917 fr-msg-tx DIS
    timestamp=153649067 fr-msg-det DCS
    timestamp=153654927 fr-msg-tx CFR
    timestamp=153668567 fr-msg-det PPS
    timestamp=153672427 fr-msg-tx RNR
    timestamp=153673677 fr-msg-det CRP
    timestamp=153675387 fr-msg-det PPS
*Jan  8 14:02:57.265: %ISDN-6-DISCONNECT: Interface Serial0/0/1:26  disconnected from 0033492946799 , call lasted 40 seconds
*Jan  8 14:02:57.269: ISDN Se0/0/1:15 Q931: TX -> DISCONNECT pd = 8  callref = 0x936F
Cause i = 0x8090 - Normal call clearing
*Jan  8 14:02:57.329: ISDN Se0/0/1:15 Q931: RX <- RELEASE pd = 8  callref = 0x136F
*Jan  8 14:02:57.329: ISDN Se0/0/1:15 Q931: TX -> RELEASE_COMP pd = 8  callref = 0x936F

Do you know if I have to add a command to the following config:

isdn switch-type primary-net5
!
voice service voip
allow-connections h323 to h323
h323
  no h225 timeout keepalive
modem passthrough nse codec g711alaw
!
voice class h323 1
h225 timeout tcp establish 3
!
voice-card 0
no dspfarm
dsp services dspfarm

!
controller E1 0/0/0
pri-group timeslots 1-31
!
controller E1 0/0/1
pri-group timeslots 1-31
!
interface Serial0/0/0:15
no ip address
encapsulation hdlc
isdn switch-type primary-net5
isdn overlap-receiving T302 3000
isdn incoming-voice voice
no cdp enable
!
interface Serial0/0/1:15
no ip address
encapsulation hdlc
isdn switch-type primary-net5
isdn overlap-receiving T302 3000
isdn incoming-voice voice
no cdp enable
!
!
!
voice-port 0/0/0:15
cptone LU
bearer-cap Speech
!
voice-port 0/0/1:15
cptone LU
bearer-cap Speech
!
voice-port 0/2/0
no vad
no comfort-noise
cptone LU
timeouts ringing infinity
!
voice-port 0/2/1
!
voice-port 0/2/2
!
voice-port 0/2/3
!
dial-peer voice 20 pots
description Luxemburg Fax dial peer
destination-pattern 23233
port 0/2/0
!
dial-peer voice 21 pots
description Luxemburg Modem dial peer
destination-pattern 23299
port 0/2/1
!
!
num-exp 264349.. 349..
num-exp 26423... 23...
num-exp 264231 23100

Thank you by advance for your help,

Best Regards

JPB

1 ACCEPTED SOLUTION

Accepted Solutions
New Member

Re: Receiving Fax CRC issue - Gateway H323

Hi,

some fax machines really don't like the bearer cap speech. Enter "default bearer-capability" or set it to audio.

This usually works.

Regards

Andre

4 REPLIES
Hall of Fame Super Gold

Re: Receiving Fax CRC issue - Gateway H323

Configure:

network-clock-participate wic 0

network-clock-select 1 E1 0/0/0

network-clock-select 2 E1 0/0/1

And let us know.

New Member

Re: Receiving Fax CRC issue - Gateway H323

Thx for your help,

The following was already configured:

network-clock-participate wic 0
network-clock-select 1 E1 0/0/0
network-clock-select 2 E1 0/0/1

I haven't copy all the config.

Sorry,

JPB

New Member

Re: Receiving Fax CRC issue - Gateway H323

Hi,

some fax machines really don't like the bearer cap speech. Enter "default bearer-capability" or set it to audio.

This usually works.

Regards

Andre

New Member

Re: Receiving Fax CRC issue - Gateway H323

Many thanks, that is solving my issue.

Regards,

JPB

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