Solved: Inbound Called Party Translation Across MGCP T1 PRI

C_Noble · ‎12-13-2023

I need some help with modifying Called Party numbers.

We have an MGCP gateway with T1 PRIs to a legacy PBX.
The legacy PBX can only send me 7 digits instead of 10.

I have 10 digits on the phone and I need to add 777 (Example Number for privacy) to the begining of the number.
Example:
Dialed number : 4551218
Number needs to translate to 7774551218

To accomplish I did the following:
1. Configured translation pattern 455XXXX > Called Party Transformation 777455XXXX, in a partition "Legacy".
2. Configured Calling Search Space with access to only "Legacy" partition.
3. Assigned the calling search space to the T1 as Inbound Calling Search Space.

The call never gets translated and show "unallocated number" in RTMT.
As a test, I gave one of my CUCM numbers the calling search space configred above, and the translation pattern does work.

Why is the call not being translated when it comes across the T1?

Am i missing something?

Any help is appreciated!

Roger Kallberg · ‎12-13-2023

Apart from what I previously wrote this article is a great read if you want to understand the use of transformation patterns in CM. Understanding the 5 uses of Calling Party Transformation Pattern in UCM It's written by the great Vik Malhi, likely the most gifted trainer that I ever had the pleasure of having attending a class with.

View solution in original post

Roger Kallberg · ‎12-13-2023

Have you reset the MGCP gateway after you did the change of the inbound CSS? Also if you could post the output from debug isdn q931 so we can see how the call is sent to CM?

C_Noble · ‎12-13-2023

Dec 13 18:21:22.575: ISDN Se0/1/0:23 Q931: RX <- SETUP pd = 8 callref = 0x1511
Bearer Capability i = 0x8090A2
Standard = CCITT
Transfer Capability = Speech
Transfer Mode = Circuit
Transfer Rate = 64 kbit/s
Channel ID i = 0xA98381
Exclusive, Channel 1
Display i = 0xB1, 'SWITCHROOM'
Calling Party Number i = 0x2183, '5555555555' <--Changed for privacy
Plan:ISDN, Type:National
Called Party Number i = 0xC1, '4551218'
Plan:ISDN, Type:Subscriber(local)
Dec 13 18:21:22.579: ISDN Se0/1/0:23 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x9511
Cause i = 0x8081 - Unallocated/unassigned number

Roger Kallberg · ‎12-13-2023

Thank you! Asking again, did you reset the gateway in CM after you did the change?

C_Noble · ‎12-13-2023

Yes and tested, no joy.

Carlo Poggiarelli · ‎12-13-2023

Hi,

In the translation pattern, make sure you selected the correct CSS which includes internal extension partition and not Legacy partition.

Please let us know

Regards

Carlo

Please rate all helpful posts "The more you help the more you learn"

Carlo Poggiarelli · ‎12-13-2023

Hi,

Please activate a debug isdn q931 on your VG and try a call.

A screenshot of how you configured both MGCP Gateway and one of the Tranlation pattern would be useful.

To start troubleshooting you can use DNA at https://<cucmip>/dna

adding a fake calling number and specifying the 7 digits called number, you should see how the cucm would treat the call.

Please let me know.

Regards

Carlo

Please rate all helpful posts "The more you help the more you learn"

C_Noble · ‎12-13-2023

Roger Kallberg · ‎12-13-2023

Not directly related to your question, but you cannot use the same CSS for transformation as for the inbound CSS. Please change these.

C_Noble · ‎12-13-2023

Changed. Still No joy. I'm going to send you a DNA.

C_Noble · ‎12-13-2023

Results Summary

Calling Party Information

Calling Party = 7670941

Partition = NORTEL-T1-DIG-MANIP

Device CSS =

Line CSS = NORTEL-INBOUND-CSS

AAR Group Name =

AAR CSS =

Dialed Digits = 43551218

Match Result = RouteThisPattern

Matched Pattern Information

Pattern = 7774351218

Partition = INTERNAL-PT

Time Schedule =

Called Party Number = 7774351218

Time Zone = Etc/GMT

Call Classification = OnNet

InterDigit Timeout = NO

Device Override = Disabled

Outside Dial Tone = NO

Call Flow

TranslationPattern :Pattern= 455XXXX

Partition = NORTEL-T1-DIG-MANIP

Positional Match List =

Calling Party Number = 7670941

PreTransform Calling Party Number = 7670941

PreTransform Called Party Number = 4551218

Calling Party Transformations

External Phone Number Mask = NO

Calling Party Mask =

Prefix =

CallingLineId Presentation = Default

CallingName Presentation = Default

Calling Party Number = 7670941

ConnectedParty Transformations

ConnectedLineId Presentation = Default

ConnectedName Presentation = Default

Called Party Transformations

Called Party Mask = 777455XXXX

Discard Digits Instruction = None

Prefix =

Called Number = 7774551218

Directory Number :DN= 7774551218

Partition = INTERNAL-PT

TypeCFACSSPolicy = Use System Default

Call Classification = Unknown

Forwarding Information

Forward All : DN = VoiceMail = No CSS = INTERNATIONAL-CSS

Forward Busy

Internal : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =

External : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =

Forward No Answer

Internal : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =

External : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =

Forward No Coverage

Internal : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =

External : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =

Forward Unregistered

Internal : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =

External : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =

CFDF : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =

Pickup Group Number =

Device :Type= Cisco 7841

Device Status = Registered

Device Name = SEP9CD57D8BD89B

Ignore Presentation Indicators = Disabled

Logged Into Hunt Groups = Enabled

Alerting Name = TEST NUM

Dual Mode = Disabled

Do Not Disturb(DND)

Automated Alternate Routing (AAR)

Alternate Matches

Note: Information Not Available

Carlo Poggiarelli · ‎12-13-2023

I can see a successful match here.

What’s the result of the call?

Let us know

Carlo

Please rate all helpful posts "The more you help the more you learn"

Roger Kallberg · ‎12-13-2023

This DNA output looks like your testing it for a phone, not from the gateway. Please redo the DNA with the gateway as the selected option. Also there are inconsistencies in the output that you share, in some places it states 7774351218 and in others 7774551218.

C_Noble · ‎12-13-2023

If you see an inconsistency between 435 and 455 its because I was changing some numbers up prior to posting on the internet for everyone to see. Rest assured I have the correct number in place.

Totally, did not know you could do a DNA from a source gateway under Analysis > Gateway.

DNA still looks good when selecting the gateway as the source:

Results Summary
- Calling Party Information
  - Calling Party = 7670941
  - Partition =
  - Device CSS = NORTEL-INBOUND-CSS
  - Line CSS =
  - AAR Group Name =
  - AAR CSS =
- Dialed Digits = 4351218
- Match Result = RouteThisPattern
- Matched Pattern Information
  - Pattern = 7774351218
  - Partition = INTERNAL-PT
  - Time Schedule =
- Called Party Number = 7774351218
- Time Zone = Etc/GMT
- Call Classification = OnNet
- InterDigit Timeout = NO
- Device Override = Disabled
- Outside Dial Tone = NO
Call Flow
- TranslationPattern :Pattern= 435XXXX
  - Partition = NORTEL-T1-DIG-MANIP
  - Positional Match List =
  - Calling Party Number = 7670941
  - PreTransform Calling Party Number = 7670941
  - PreTransform Called Party Number = 4351218
  - Calling Party Transformations
    - External Phone Number Mask = NO
    - Calling Party Mask =
    - Prefix =
    - CallingLineId Presentation = Default
    - CallingName Presentation = Default
    - Calling Party Number = 7670941
  - ConnectedParty Transformations
    - ConnectedLineId Presentation = Default
    - ConnectedName Presentation = Default
  - Called Party Transformations
    - Called Party Mask = 777435XXXX
    - Discard Digits Instruction = None
    - Prefix =
    - Called Number = 7774351218
  - Directory Number :DN= 7774351218
    - Partition = INTERNAL-PT
    - TypeCFACSSPolicy = Use System Default
    - Call Classification = Unknown
    - Forwarding Information
      - Forward All : DN = VoiceMail = No CSS = INTERNATIONAL-CSS
      - Forward Busy
        Internal : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =
        External : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =
      - Forward No Answer
        Internal : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =
        External : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =
      - Forward No Coverage
        Internal : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =
        External : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =
      - Forward Unregistered
        Internal : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =
        External : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =
      - CFDF : DN = VoiceMail = Yes VoiceMailBoxNumber = 7774351218 CSS =
      - Pickup Group Number =
    - Device :Type= Cisco 7841
      - Device Status = Registered
      - Device Name = SEP9CD57D8BD89B
      - Ignore Presentation Indicators = Disabled
      - Logged Into Hunt Groups = Enabled
      - Alerting Name = TEST NUM
      - Dual Mode = Disabled
      - Do Not Disturb(DND)
        DND Status = Disabled
        DND Option =
        DND Incoming Call Alert =
      - Automated Alternate Routing (AAR)
        AAR Group Name =
        AAR Calling Search Space =
        AAR VoiceMail Status = Disabled
        AAR Destination Mask =
        AAR Prefix Digits =
      - Alternate Matches
        Note: Information Not Available

Roger Kallberg · ‎12-13-2023

From what I can see you’re still doing the DNA as if the call is made by a phone.

Device :Type= Cisco 7841

Device Status = Registered
Device Name = SEP9CD57D8BD89B