Hi,
i am not very savvy in CCM i have just a basic knowledge. Now, the scenario is pretty simple:
- I have CCM connected to a 2900 router. Connection is via SIP to our provider.
- Every calls that is received by the physical lines gets pushed to the CCM that handles the call
- everything works fine, i can call in and out from the phones.
- Customer wants to assign a directory number so that calling that number it gets forwarded to an external fax machine, so:
i call from the public to: 01 1111 1111 (1111 is a line that is managed by CCM)
DN 1111 is configured in CCM to forward all to 02 2222 2222 which is an external fax provider (that acts as a normal fax machine).
If i call with a normal phone the number 01 1111 1111 i can hear the modem like answer from the fax machine (i can see from the logs of the fax machine on the other end that is receiving a call, so the transfer works, or at least i think so). I can see the modem tone going for about 5 seconds, then the calls gets dropped.
if i send a fax from a machine i have here directly to 02 2222 2222 everything works, so there is something going on when CCM transfer the call. This is the config of the 2800:
version 15.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
hostname Router
boot-start-marker
boot-end-marker
enable secret BLABLABLA
no aaa new-model
ip cef
no ipv6 cef
multilink bundle-name authenticated
cts logging verbose
voice-card 0
voice service voip
ip address trusted list
ipv4 MY TRUSTED LIST
mode border-element
allow-connections sip to sip
no supplementary-service sip refer
fax protocol t38 nse version 0 ls-redundancy 0 hs-redundancy 0 fallback pass-through g711ulaw
sip
no update-callerid
early-offer forced
no silent-discard untrusted
voice class codec 10
codec preference 1 g711alaw
codec preference 2 g711ulaw
codec preference 3 g729r8
voice class codec 1
codec preference 1 transparent
voice translation-rule 1
rule 1 WHATEVER
voice translation-profile inbound
translate called 1
license udi pid CISCO2911/K9 sn BLABLA
hw-module pvdm 0/0
redundancy
interface Embedded-Service-Engine0/0
no ip address
shutdown
interface GigabitEthernet0/0
ip address MYIP 255.255.255.252
duplex auto
speed auto
interface GigabitEthernet0/1
ip address IPADDRESS 255.255.252.0
ip access-group SIP in
duplex auto
speed auto
interface GigabitEthernet0/2
no ip address
shutdown
duplex auto
speed auto
ip forward-protocol nd
no ip http server
no ip http secure-server
!
Ip route to MY STUFF
!
ip access-list extended SIP
permit ip MYSIPPROVIDER
control-plane
mgcp behavior rsip-range tgcp-only
mgcp behavior comedia-role none
mgcp behavior comedia-check-media-src disable
mgcp behavior comedia-sdp-force disable
mgcp profile default
dial-peer voice 1000 voip
translation-profile incoming inbound
session protocol sipv2
incoming called-number +T
voice-class codec 1
dtmf-relay rtp-nte
no vad
dial-peer voice 2000 voip
destination-pattern 01 1111 111. ------- THIS IS MY PUBLIC NUMBER THAT I CALL THAT WORKS (DN are 1111 1112 and so on)
no modem passthrough
session protocol sipv2
session target ipv4:IPOFTHECCM
voice-class codec 1
dtmf-relay rtp-nte
fax-relay ecm disable
fax rate disable
fax protocol t38 nse version 0 ls-redundancy 0 hs-redundancy 0 fallback pass-through g711ulaw
no vad
dial-peer voice 3000 voip
session protocol sipv2
incoming called-number .
dtmf-relay rtp-nte
codec g711alaw
no vad
dial-peer voice 4000 voip
destination-pattern .T
session protocol sipv2
session target ipv4:IPOFMYSIPPROVIDER
dtmf-relay rtp-nte
codec g711alaw
fax-relay ecm disable
fax rate disable
fax protocol t38 nse version 0 ls-redundancy 0 hs-redundancy 0 fallback pass-through g711ulaw
no vad
dial-peer voice 1001 voip
no modem passthrough
gatekeeper
shutdown
thanks
