Hold & Transfer Problem on External Translated Calls (DID Mode)

[mehrdadelectron]

Hi

We have E1(voice) link connected to 2900 router,telephony service provider gave us 4 fixed  number with 4 variable extensions for example: 1234XXXX

my ip phones registred to Cisco Unified Call Manager 10.5.when I use PLAR for E1 voice-port to reception, everything works correctly but when i  use translation in DID mode (to allow direct call from PSTN to any internal number --> example :internal number=1001 --> person from outside called 12341001 to call to 1001) Hold & Transfer buttons don't work!  this buttons work when internal call dialed but for external PSTN user that call 12341001 we don't have hold & Transfer.

In additional, area code is 88 and Telephony Service Provider send called number with area code so i have to translate it before send to Call Manager.

Here is Voice Part of Router Config:

voice service voip
 allow-connections h323 to h323
 allow-connections h323 to sip
 allow-connections sip to h323
 allow-connections sip to sip
 fax protocol cisco
 h323
 sip
!
voice class codec 1
 codec preference 1 g711alaw
 codec preference 2 g711ulaw
 codec preference 3 g729r8
!
voice class h323 1
  h225 timeout tcp establish 3
!
voice translation-rule 1
 rule 1 /^881234\(....\)/ /\1/
!
voice translation-profile INCOMING-E1
 translate called 1
voice-card 0
!

dial-control-mib retain-timer 10080
dial-control-mib max-size 700
!
!
controller E1 0/0/0
 framing NO-CRC4
 pri-group timeslots 1-31
!
controller E1 0/0/1
 pri-group timeslots 1-10,16
!

interface Serial0/0/0:15
 no ip address
 encapsulation hdlc
 isdn switch-type primary-net5
 isdn overlap-receiving
 isdn incoming-voice voice
 isdn send-alerting
 isdn bchan-number-order ascending
 isdn sending-complete
 no cdp enable
!
voice-port 0/0/0:15
 no vad
 no comfort-noise
 bearer-cap Speech
!
dial-peer voice 1001 voip
 translation-profile outgoing INCOMING-E1
 destination-pattern 881234....
 session target ipv4:192.168.192.2
!
dial-peer voice 3001 pots
 incoming called-number 881234....
 direct-inward-dial
!

[Manish Gogna · Accepted solution]

Hi,

Hold and transfer are supplementary functions, if they are not working this could be due to MTP not being allocated for the call. Can you check MTP required on the gateway / trunk and reset it and see if it works. Also, ensure that MTP resource is added in the MRGL assigned to the gateway / trunk.

Manish

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[mehrdadelectron]

Thanks man, I made MTP between my router & cucm but the problem does not solved.

[gayathridissanayaka]

Hi Manish,

Thought you might have com across the problem I am experiencing below or may know a clue of what is happening here.

https://supportforums.cisco.com/discussion/12628681/has-anyone-experiencedmusic-hold-getting-distorted-when-call-through-gateway-put

Appreciate if you could please spare a minute.Sorry I had to post this on someone else's post.

Thank you

Gayathri