Here is a copy of the config I am using. I have used a H323 gateway . I am going to try the link that you send with the MGCP gateway and will let you know.
Building configuration...
Current configuration : 2368 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname pabxavr1
!
boot-start-marker
boot-end-marker
!
card type e1 1
logging buffered 4096 debugging
enable secret xxx
!
network-clock-participate wic 0
no aaa new-model
ip subnet-zero
!
!
ip cef
!
!
no ip domain lookup
ip host EUPHONIA 149.x.126.10
no ftp-server write-enable
isdn switch-type primary-net5
!
voice-card 0
dspfarm
dsp services dspfarm
!
!
!
voice service voip
fax protocol pass-through g711ulaw
modem passthrough nse codec g711ulaw
!
!
voice class codec 1000
codec preference 1 g711ulaw
!
!
!
voice class h323 1
h225 timeout tcp establish 5
!
!
!
!
!
!
!
!
!
!
!
controller E1 0/0/0
ds0-group 0 timeslots 1-15,17-31 type r2-digital dtmf dnis
!
controller E1 0/0/1
!
controller E1 1/0
!
!
!
interface Loopback0
ip address 129.94.x.x.255.255.255
!
interface GigabitEthernet0/0
ip address 129.94.x.x.255.255.252
duplex auto
speed auto
!
interface GigabitEthernet0/1
ip address 149.171.x.x.255.255.192
duplex auto
speed auto
!
router ospf 1000
log-adjacency-changes
auto-cost reference-bandwidth 1000
passive-interface default
no passive-interface GigabitEthernet0/0
network 129.94.x.x.0.0.0 area 0
network 129.94.x.x0.0.0.0 area 0
network 149.171.x.x.0.0.0 area 0
!
ip classless
!
!
ip http server
no ip http secure-server
!
!
!
!
control-plane
!
!
!
voice-port 0/0/0:0
!
!
!
!
dial-peer voice 1 pots
tone ringback alert-no-PI
description Outgoing Calls to NEC PABX
destination-pattern .T
progress_ind alert enable 8
direct-inward-dial
port 0/0/0:0
forward-digits 0
!
dial-peer voice 2 voip
description Inbound to CCM
destination-pattern 8....
progress_ind setup enable 3
modem passthrough nse codec g711ulaw
voice-class codec 1000
voice-class h323 1
session target dns:EUPHONIA
dtmf-relay h245-alphanumeric
fax-relay ecm disable
no vad
!
dial-peer voice 3 voip
description UCW 75XX DDI Range
destination-pattern 5....
modem passthrough nse codec g711ulaw
voice-class codec 1000
voice-class h323 1
session target dns:EUPHONIA
incoming called-number 8....
dtmf-relay h245-alphanumeric
fax-relay ecm disable
no vad
!
!
!
line con 0
line aux 0
line vty 0 4
password xxx
login
!
scheduler allocate 20000 1000
!
end
