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Cisco Bug: CSCup99586 - Delay during enbloc dialing from SIP endpoints and Jabber client

Last Modified

May 16, 2018

Products (1)

  • Cisco Unified IP Phone 7900 Series

Known Affected Releases

none

Description (partial)

Symptom:
When the Jabber client calls another E.164 number there is a 6 sec delay before the other endpoint rings, this matches the Inter Digit Timeout value configured on cluster.
Also, Jabber does not have a dial-pad and the number is entered in full before placing the call, Enbloc dialing. CUCM should not wait any longer for additional digits and route the call right away.


This issue happens on ALL Cisco SIP Hard Phones as well (99xx, 89xx, 79xx, 78xx, 88xx, EXxx, MXxx, SXxx, C20, C40, C60, C90 etc). But Cisco SCCP phones and third party SIP phones works fine.
The 6 seconds is the interdigit timeout value on CUCM.

Conditions:
Delay occurs during enbloc dialing via pattens including '!' 

If we dial a number (Enbloc dialling) that hits the pattern , example : 3130!

In digit analysis we can see below.

Cisco SCCP phone :  |PotentialMatches=NoPotentialMatchesExist
Third Party SIP Phone: 1st DA== |PotentialMatches=NoPotentialMatchesExist    2nd DA==|PotentialMatches=NoPotentialMatchesExist
Jabber Client: 	|PotentialMatches=PotentialMatchesExist
Cisco SIP Phone: 	|PotentialMatches=ExclusivelyOffNetPotentialMatchesExist




The issue here is the lack of any explicit indication from the SIP endpoint that dialing is complete.  
When the user dials while on-hook, then goes off hook, the digits are sent "en bloc" to CUCM.  
SCCP sends an explicit indication that the dial string is complete, but SIP endpoints and clients do not.

Related Community Discussions

Delay during enbloc dialing from SIP Endpoint 8861
Hi, last week we upgraded without problems the CUCM from 8.6.2 to 10.5.2  We work with Cisco IP Phones 7961/7962/7965/7970 (SCCP Protocol) After successfull upgrade we begän to change the Cisco IP-Phones for some Users.They got the new Cisco 8861 (SIP Protocol) with Expansion Module. After replacing the phones this User complains, that there was a delay on calls initiated from the Cisco 8861 phone outside to PSTN. Customer dials the whole number (on-hook) - then he pushes the speaker or the dial ...
Latest activity: Nov 21, 2017
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