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New Member

Delays in calling another phone or getting to voicemail

When we first brought up the Call Manager system (before the SIP Trunk was activated), we can get instant connection when calling another phone on our call manager system or getting to voicemail.  After bringing up the SIP Trunk, I am now seeing delays of up to 17 seconds before getting connected to voicemail or calling another phone.That is being measured after the last digit is dialed manually.  Pressing the voicemail button (the one marked iwht an envelope) is seeing a similar delay. 

By comparison, I can call an external number and have it rining in 5 seconds after the last digit is dialed.

I was thinking that this might be fixed by adjusting some type of "inter-digit" delay or something like that.  Havent been able to find any settings that address this.

Suggestions ?

Ron

6 REPLIES
Hall of Fame Super Red

Re: Delays in calling another phone or getting to voicemail

Hi Ron,

This type of delay is usually caused by an Overlap in the Dialplan.  For example the DN's are 8xxx and a RP that begins with 8.  The best way to fix this is to remove any overlapping patterns.

When  you have overlap in the Dialplan is when the CUCM Parameter (Interdigit  Timeout) might come into play and delays the connection.

Take close look at the Route Plan Report in CUCM to determine this overlap

You can also sort these type of problems using DNA the Dialed Number Analyzer.

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/dna/8_0_1/dnaguide.pdf

The IDT is seen in CUCM as the T302 timer.

Try this info;

Delay in Call Establishment: Configuring the Interdigit Timeout

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a00800dab26.shtml

Cheers!

Rob

"Why do the best things always disappear " 

- The Band

New Member

Delays in calling another phone or getting to voicemail

Thanks.  Still feeling my way around in CM 9.1.  I had dealt with CCME about 10 years ago but not much since then.

Adjusting the T302 parameter has helped.  When I went in, it was set to 15000.  Dropped it to 5000 and it has made a noticeable difference. The Call Manager system we are running on was what we set up when the instructor came onsite to give us a 5 day crash course in Call Manager. I have a lot of learning to do that will only come with time and spending time in the trenches.

Ran the DNA and got this output.  Not seeing anything that stands out as a problem but with what little I know of CM, I might not see a problem -

  • Results Summary
  • Calling Party Information
    • Calling Party = 1826
    • Partition = E911_pt:Employee_pt:Executive_pt:Lobby_pt:Local_pt:LD_pt:Intl_pt:TRK_pt
    • Device CSS =
    • Line CSS = Unlimited_Access_cs
    • AAR Group Name =
    • AAR CSS =
  • Dialed Digits = 2999
  • Match Result = RouteThisPattern
  • Matched Pattern Information
    • Pattern = 2999
    • Partition = Executive_pt
    • Time Schedule =
  • Called Party Number = 2999
  • Time Zone = Etc/GMT
  • End Device = Unity_Publisher.hl
  • Call Classification = OnNet
  • InterDigit Timeout = YES
  • Device Override = Disabled
  • Outside Dial Tone = NO
  • Call Flow
  • TranslationPattern :Pattern=
    • Partition =
    • Positional Match List = 2999
    • Calling Party Number = 1826
    • PreTransform Calling Party Number =
    • PreTransform Called Party Number =
    • Calling Party Transformations
      • External Phone Number Mask = NO
      • Calling Party Mask =
      • Prefix =
      • CallingLineId Presentation =
      • CallingName Presentation =
      • Calling Party Number = 1826
    • ConnectedParty Transformations
      • ConnectedLineId Presentation =
      • ConnectedName Presentation =
    • Called Party Transformations
      • Called Party Mask =
      • Discard Digits Instruction =
      • Prefix =
      • Called Number =
  • Hunt Pilot :Pattern= 2999
    • Positional Match List = 2999
    • DialPlan =
    • Route Filter
      • Filter Name =
      • Filter Clause =
    • Hunt Forward Settings
      • Forward Hunt No Answer
        • Use Personal Preferences = No
        • Destination =
        • Calling Search Space =
      • Forward Hunt Busy
        • Use Personal Preferences = No
        • Destination =
        • Calling Search Space =
      • Maximum Hunt Timer =
    • Call Classification =
    • PreTransform Calling Party Number = 1826
    • PreTransform Called Party Number = 2999
    • Calling Party Transformations
      • External Phone Number Mask = NO
      • Calling Party Mask =
      • Prefix =
      • CallingLineId Presentation = Default
      • CallingName Presentation = Default
      • Calling Party Number = 1826
    • ConnectedParty Transformations
      • ConnectedLineId Presentation = Default
      • ConnectedName Presentation = Default
    • Called Party Transformations
      • Called Party Mask =
      • Discard Digits Instruction = None
      • Prefix =
      • Called Number = 2999
  • Hunt List :HuntListName= Unity_Publisher.hl
    • Line Group :LineGroupName= Unity_VM.lg
  • Alternate Matches
  • Partition :Name= Employee_pt

    Thanks,

    Ron

    Hall of Fame Super Silver

    Delays in calling another phone or getting to voicemail

    Sounds like you introduced an inter-digit timeout in your dial plan, make sure any of your translation patterns or route patterns that start with X, or [1-9], etc dont overlap with your internal dial plan.

    HTH,

    Chris

    New Member

    Delays in calling another phone or getting to voicemail

    I am afraid that we have overlaps with one translation patter and at least one route pattern.  My boss wanted a shortcut way of dialing extensions of phones at the corporate offices without having to dial area code and prefix.

    I came up with one way to meet my boss's request and had to implement a second way when he wanted a button on the phone screen to do this instead of just pressing 8 and then the 4 digits.

    Ron

    Hall of Fame Super Silver

    Delays in calling another phone or getting to voicemail

    That is where shortcuts can bite you, dial plan design without creating overlaps requires careful planning and prefixes where needed.  You will need to fix your dial plan or live with inter-digit timeouts.

    HTH, please rate all useful posts!

    Chris

    Hall of Fame Super Red

    Delays in calling another phone or getting to voicemail

    Hi Ron,

    This portion of DNA does confirm our suspicions and you have verified

    the overlap as well;

    InterDigit Timeout = YES

    I would work with the Boss to try and come up with a plan of attack that

    doesn't involve the overlap as even 5 seconds is too long for most users

    these days. When you try to tune the T302 timer down too much you will

    get further complaints from users that they don't have enough time to dial.

    Perhaps if you describe the nature of your shortcut/design someone here might be able

    to come up with a suitable design.

    Cheers!

    Rob

    "Why do the best things always disappear " 

    - The Band

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