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T.37 fax on-ramp problem

I have a problem with on-ramp gateway on Cisco 3825. When sending the fax calling fax machine starts transmission, a sheet of paper moves into it a little then stops and machine disconnects with "transmission error" message on the LCD.

Whant seems strange is how call looks in show voice call status output:

CallID CID ccVdb Port DSP/Ch Called # Codec Dial-peers

0x6438 356D 0x6599FDC8 1/0:15.31 1/3:3 *4732279252 g711ulaw 300/160

0x6439 3F29 0x6599FDC8 1/0:15.10 1/3:4 4732279252 g729r8 p 102/160

The codec is always g729r8, but I don't see how to change it in case when no voip dial peers are involved in call:)

Called number and outgoing dial-peer always repeat the ones from previous connected voice call.

Debug foip on-ramp shows disconnection on protocol error. Cause 111.

boot system flash c3825-ipvoice-mz.124-16.bin

network-clock-participate slot 1

network-clock-select 1 E1 1/0

ip name-server 192.168.1.3

ip name-server 192.168.1.1

isdn switch-type primary-net5

voice-card 0

no dspfarm

!

voice-card 1

no dspfarm

!

!

!

!

voice service pots

!

voice service voip

allow-connections h323 to h323

fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback cisco

h323

!

!

!

voice class codec 1

codec preference 1 g711ulaw

codec preference 2 g711alaw

codec preference 3 g729r8

!

!

!

!

!

fax receive called-subscriber $d$

fax send transmitting-subscriber $s$

fax send left-header $a$

fax send center-header $s$

fax send right-header $t$

fax interface-type fax-mail

mta send server 192.168.1.22 port 25

mta send server mail1-co.tvel.ru port 25

mta send subject Fax from On-Ramp MZP Gateway

mta send with-subject both

mta send origin-prefix "Cisco-powered Fax System"

mta send postmaster Kozin@tvel.ru

mta send mail-from hostname MZP_Gateway.tvel.ru

mta send mail-from username $s$

mta send return-receipt-to username $s$

mta receive aliases tvel.ru

mta receive aliases 192.168.1.22

mta receive generate mdn

!

application

service on-ramp flash:app_faxmail_onramp.2.0.1.3.tcl

!

service aa flash:aa_simple_v14.tcl

param max-extension-length 4

param reception-number 0000

!

!

!

controller E1 1/0

framing NO-CRC4

pri-group timeslots 1-31

!

!

interface GigabitEthernet0/1

ip address 192.168.6.10 255.255.255.0

duplex auto

speed auto

media-type rj45

h323-gateway voip interface

h323-gateway voip bind srcaddr 192.168.6.10

!

interface Serial1/0:15

no ip address

encapsulation hdlc

isdn switch-type primary-net5

isdn incoming-voice modem

isdn calling-number 9888282

no cdp enable

!

!

!

voice-port 1/0:15

no echo-cancel enable

!

!

!

!

!

dial-peer voice 300 voip

preference 1

destination-pattern 6...

session target ipv4:192.168.5.254

dtmf-relay h245-alphanumeric

codec g711ulaw

no vad

!

dial-peer voice 301 voip

destination-pattern 6...

session target ipv4:192.168.5.253

dtmf-relay h245-alphanumeric

codec g711ulaw

no vad

!

!

!

dial-peer voice 102 pots

service on-ramp

incoming called-number 9888383

direct-inward-dial

forward-digits all

!

dial-peer voice 400 mmoip

service on-ramp

service fax_on_vfc_onramp_app out-bound

destination-pattern 9888383

information-type fax

session target mailto:Kozin@tvel.ru

!

dial-peer voice 101 pots

service aa

incoming called-number 9888282

direct-inward-dial

!

dial-peer voice 160 pots

destination-pattern .T

direct-inward-dial

port 1/0:15

forward-digits all

!

dial-peer voice 304 voip

description -= Direct PSTN Numbers =-

preference 1

destination-pattern 984....

session target ipv4:192.168.5.254

dtmf-relay h245-alphanumeric

codec g711ulaw

no vad

!

dial-peer voice 305 voip

description -= Direct PSTN Numbers =-

destination-pattern 984....

session target ipv4:192.168.5.253

dtmf-relay h245-alphanumeric

codec g711ulaw

no vad

!

Have anyone ever faced anything like this?

2 REPLIES
Silver

Re: T.37 fax on-ramp problem

The Cisco universal access server acts as an on-ramp gateway to receive faxes from end users and uses call discrimination to determine call type and destination. It converts the faxes into Tagged Image File Format (TIFF) files, creates standard Multipurpose Internet Mail Extension (MIME) e-mail messages, and attaches the TIFF files to e-mail messages. In addition, it forwards the fax mail messages to the messaging infrastructure of a designated Simple Mail Transfer Protocol (SMTP) server, where fax mail messages are stored.

For more information, refer to Configuring Fax Applications.

This URL should help you:

http://www.cisco.com/en/US/products/hw/switches/ps708/prod_release_note09186a008014f555.html

http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_configuration_guide_chapter09186a0080080b67.html#wp1000871

Bronze

Re: T.37 fax on-ramp problem

Might be clocking issues, do you see any frame slips under the 'show controller e1' command?

Let us know, Avner.

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