[cisco-voip] Analog phones cant transfer calls on 2811 acting as H323 gw to UCM 4.2(3)

[Cucumber Green]

Analog phones can send and receive calls from IP phones, but
  when pressing the hookflash key at the analog phone, the analog phone does not get a dial tone in order to transfer the call :(
   
  Phones are hooked into FXS ports on a 2811 and will use G729 codec.
   
  I have already checked the "Media Termination Point required" check box in the gateway configuration at call manager (using unified call manager 4.2(3) ). I thought that would do the trick, but it didnt, any ideas?
   
  This is the gateway config (IOS version 12.4(3g) spservicesK9)
   
  !
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
ip subnet-zero
!
 !
ip cef
!
!
no ip domain lookup
!
voice-card 0
 no dspfarm
!
!
!
!
interface Loopback0
 ip address X.X.X.X 255.255.255.255
 h323-gateway voip bind srcaddr X.X.X.X
!
!
ip classless
ip route 0.0.0.0 0.0.0.0 X.X.X.X 254
!
!
control-plane
!
!
!
voice-port 0/1/0
 signal loopStart
!
voice-port 0/1/1
 signal loopStart
!
dial-peer voice 10 pots
 destination-pattern 50001
 port 0/1/0
!
dial-peer voice 20 pots
 destination-pattern 50002
 port 0/1/1
!
dial-peer voice 1 voip
 preference 1
 destination-pattern 1...
  session target ipv4:X.X.X.X
 dtmf-relay h245-alphanumeric
 codec g729r8 bytes 40
 ip qos dscp cs3 media
 ip qos dscp cs3 signaling
!
dial-peer voice 4 voip
 preference 2
 destination-pattern 1...
 session target ipv4:X.X.X.X
 dtmf-relay h245-alphanumeric
 codec g729r8 bytes 40
 ip qos dscp cs3 media
 ip qos dscp cs3 signaling
 !


       
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