[cisco-voip] 827-4v troubleshooting with fax calls

[pongo at smrt.it]

hi all.
I am quite new in VOIP on Cisco and I have the following problem:
scenario:
cisco 827-4v for 3 analogic voice channal and 1 g3 fax channal
eth0 for lan connection
wan connection is ADSL 1280x254 (128 MCR).
voip works in h323; gatekeeper address configured on cisco.


fax calls never worked, AND when I try receiving a fax (fax machine
attachet to a phone port -configured for fax) the router freeze for a few
minutes (the impression is that it puts all ports in shutdown, then
reboot).
Now the gatekeeper uses g.911 (heard 32K-voice, and about 100Kfax) but we
will upgrade in a few days to g.729 (see conf).
Is it possible that this upgrade of my voip-carrier could solve this
problem? I read that g.729 is about 10K voice, how much about a fax call?
and, are them ONLY bandwith problems?

Regards,
Pongo

following some parts of my show:



version 12.2
no service pad
service timestamps debug datetime localtime
service timestamps log datetime localtime
service password-encryption
!
hostname my_host
!
logging queue-limit 100
logging buffered 20000 debugging
enable secret sisco
!
username supp-rete password 7 020707561B
username ing-npd password 7 03165418260A
!
ip subnet-zero
no ip domain lookup
!
ip cef
!
voice call send-alert
voice call convert-discpi-to-prog
voice rtp send-recv
!
voice service voip
 h323
 modem passthrough nse codec g711alaw
!
voice class codec 1
 codec preference 1 g729br8
 codec preference 2 g711alaw
!
no voice hpi capture buffer
no voice hpi capture destination
!
!
 class-map match-any VoIP
  match ip precedence 5
 class-map match-any Multimediale
  match ip precedence 3
 class-map match-any Professional
  match ip precedence 0  1  2  4
  match ip precedence 7
 class-map match-any Management
  match ip precedence 6
 class-map match-any LAN
  match access-group 110
!
!
 policy-map ETH-IN
  class class-default
   set ip precedence 0
!
translation-rule 1
 Rule 0 ^0* 9
!
translation-rule 2
 Rule 0 ^9* 0
!
!hele begin a *cut* --
!loopback, eth, pointtopoint config (it works)
interface Loopback0
!<cut>
interface Loopback1
!<cut>
interface Loopback3
 description Interfaccia H323
 ip address xxx.xxx.xxx.xxx 255.255.255.255
 h323-gateway voip interface
 h323-gateway voip id ZONA1E164 ipaddr xxx.xxx.xxx.xxx 1719
 h323-gateway voip h323-id mil-etc(ZONA1E164)
 h323-gateway voip tech-prefix 1#
 h323-gateway voip bind srcaddr xxx.xxx.xxx.xxx
!
interface Ethernet0
 <cut>
!
interface ATM0
!<cut>
!
interface ATM0.35 point-to-point
! <cut>
 !
!
ip classless
ip route 0.0.0.0 0.0.0.0 ATM0.35
ip nat inside source list 101 interface Loopback0 overload
no ip http server
!<cut> (some acl)
!

call rsvp-sync
!
voice-port 1
 translate called 1
 cptone IT
 timeouts initial 20
 timeouts interdigit 4
!
voice-port 2
 translate called 1
 cptone IT
 timeouts initial 20
 timeouts interdigit 4
!
voice-port 3
 translate called 1
 cptone IT
 timeouts initial 20
 timeouts interdigit 4
!
voice-port 4
 translate called 1
 cptone IT
 timeouts initial 20
 timeouts interdigit 4
!
!
dial-peer voice 199 voip
 incoming called-number .T
 voice-class codec 1
!
dial-peer voice 200 voip
 destination-pattern .T
 translate-outgoing called 2
 voice-class codec 1
 session target ras
 dtmf-relay rtp-nte
 fax rate disable
 clid network-number fax-number
!
dial-peer voice 100 pots
 description Linea n.1 portata T.I.
 destination-pattern fax-number
 port 1
!
dial-peer voice 101 pots
 description Linea n.1 portata T.I.
 destination-pattern fax-number
 port 2
!
dial-peer voice 102 pots
 description Linea n.1 portata T.I.
 destination-pattern fax-number
 port 3
!
dial-peer voice 103 pots
 description Linea n.1 portata T.I.
 destination-pattern fax-number
 port 4
!
!
dial-peer voice 113 pots
 description Linea n.2 Atlanet
 destination-pattern tel1-number
 port 2
!
dial-peer voice 114 pots
 description Linea n.3 Atlanet
 destination-pattern tel2-number
 port 3
!
dial-peer voice 115 pots
 description Linea n.4 Atlanet
 destination-pattern tel3-number
 port 4
dial-peer terminator D
gateway
!
!
banner motd ^^