I have a client with an H323 gateway. They recently began having some issue with audio and unchecking "Media Termination Point Required" in CUCM on the gateway's page fixed that issue. BUT, after that they were no longer able to successfully transfer calls. All external calls for the site go in/out a set of POTS lines on an FXO card, so all calls are between an FXO port and a local phone. When someone calls in, the port PLARs it to the front desk extension. Once the receptionist determines who they need to speak with, she hits the transfer button and the user is successfully placed on hold. Once she's dialed the extension to which she is transferring the call and hits TRANSFER again, the call is disconnected. I think something is missing from the gateway config, but I'm not sure what. Below is a sanitized copy of the gatway config. The CUCM is 6.x.
version 12.4
service timestamps debug datetime msec localtime show-timezone service timestamps log datetime msec localtime show-timezone service password-encryption no service dhcp !
hostname OSU-UML-Edmond-2811
!
boot-start-marker
boot system flash:c2800nm-adventerprisek9-mz.124-24.T4.bin
boot-end-marker
!
logging message-counter syslog
logging buffered 3000000
no logging monitor
no aaa new-model
!
dot11 syslog
ip source-route
!
!
ip cef
!
!
no ip domain lookup
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
!
voice call send-alert
voice rtp send-recv
!
voice service voip
allow-connections h323 to h323
fax protocol cisco
h323
no h225 timeout keepalive
!
!
!
voice class codec 99
codec preference 1 g711ulaw
codec preference 2 g729r8
!
!
!
!
voice class h323 98
h225 timeout tcp establish 3
!
!
!
!
!
!
!
!
!
!
!
!
voice-card 0
!
!
application
global
service alternate default
!
!
!
!
!
!
!
archive
log config
hidekeys
!
!
!
!
!
!
class-map match-any signal
match access-group 102
match ip dscp af31
match ip precedence 3
match dscp cs3
class-map match-any voice
match access-group 101
match ip rtp 16384 16383
match ip dscp ef
match ip precedence 5
!
!
policy-map voice
class voice
priority 8000
set dscp ef
class signal
set dscp cs3
bandwidth 80
class class-default
fair-queue
random-detect dscp-based
!
!
!
!
!
interface FastEthernet0/0
description TO LAN
ip address 172.16.90.254 255.255.255.0
duplex full
speed 100
h323-gateway voip bind srcaddr 172.16.90.254 service-policy output voice !
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 172.16.90.1
ip http server
ip http access-class 23
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000 !
!
!
access-list 101 permit udp host 10.10.0.10 any range 16384 32767
access-list 101 permit udp host 10.10.0.10 range 16384 32767 any
access-list 102 permit udp host 10.10.0.10 any eq 1719
access-list 102 permit udp host 10.10.0.10 eq 1719 any
access-list 102 permit udp host 10.10.0.10 any eq 1718
access-list 102 permit udp host 10.10.0.10 eq 1718 any
access-list 102 permit tcp host 10.10.0.10 eq 1720 any
access-list 102 permit tcp host 10.10.0.10 any eq 1720
access-list 102 permit tcp host 10.10.0.10 any range 2000 2002
access-list 102 permit tcp host 10.10.0.10 range 2000 2002 any
access-list 102 permit tcp host 10.10.0.10 any range 11000 11999
access-list 102 permit tcp host 10.10.0.10 range 11000 11999 any
access-list 102 permit tcp host 10.10.0.10 eq 2428 any
access-list 102 permit tcp host 10.10.0.10 any eq 2428
access-list 102 permit udp host 10.10.0.10 eq 2427 any !
!
!
!
!
!
control-plane
!
!
!
voice-port 0/0/0
echo-cancel coverage 64
timing hookflash-out 50
connection plar 7000
!
voice-port 0/0/1
echo-cancel coverage 64
timing hookflash-out 50
connection plar 7000
!
voice-port 0/0/2
!
voice-port 0/0/3
!
no ccm-manager fax protocol cisco
!
no mgcp package-capability fxr-package
no mgcp timer receive-rtcp
!
!
!
dial-peer voice 2 pots
incoming called-number .
port 0/0/1
!
dial-peer voice 20 pots
destination-pattern 9T
port 0/0/0
!
dial-peer voice 21 pots
destination-pattern 9T
port 0/0/1
!
dial-peer voice 91 pots
destination-pattern 911
no digit-strip
port 0/0/0
!
dial-peer voice 92 pots
destination-pattern 911
no digit-strip
port 0/0/1
!
dial-peer voice 911 pots
destination-pattern 9911
port 0/0/0
prefix 911
!
dial-peer voice 921 pots
destination-pattern 9911
port 0/0/1
prefix 911
!
dial-peer voice 1 pots
incoming called-number .
port 0/0/0
!
dial-peer voice 5 pots
destination-pattern 94766815
port 0/0/0
forward-digits 7
!
dial-peer voice 1000 voip
destination-pattern [12345678]...
voice-class codec 99
voice-class h323 98
session target ipv4:10.10.0.11
incoming called-number .
no vad
!
dial-peer voice 1001 voip
destination-pattern [12345678]...
voice-class codec 99
voice-class h323 98
session target ipv4:10.10.0.10
incoming called-number .
no vad
!
dial-peer voice 3 pots
destination-pattern 9[2-9]......
port 0/0/0
forward-digits 7
!
!
!
!
call-manager-fallback
max-conferences 4 gain -6
transfer-system full-consult
ip source-address 192.168.90.254 port 2000 max-ephones 24 max-dn 100 application default !
!
line con 0
exec-timeout 30 0
login local
line aux 0
line vty 0 4
exec-timeout 30 0
privilege level 15
login local
transport input telnet ssh
line vty 5 15
exec-timeout 30 0
privilege level 15
login local
transport input telnet ssh
!
scheduler allocate 20000 1000
end
