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Dropping In Progress Calls

Any ideas?

Customer is dropping random calls to the PSTN (some after a few minutes, some after 20 minutes). All disconnects have been from different numbers. They have varios ISDN PRI's (2851's setup as MGCP gateways). CCM is 4.1. CCM has most up to date OS and SR. Phones have most up to date SCCP image. All phones have been reset. Below is an example of error message. Any ideas? Under gateway endpoints, they have calling number IE set to CCM and Called Number IE set to CCM. Seems that error is always on connection where far end is non-isdn. Would setting called number IE to "National" potentiall resolve?

27: Oct 25 17:57:14.329: ISDN Se0/0/0:23 Q931: TX -> SETUP pd = 8 callref = 0x0029

<009>Bearer Capability i = 0x8090A2

<009><009>Standard = CCITT

<009><009>Transfer Capability = Speech

<009><009>Transfer Mode = Circuit

<009><009>Transfer Rate = 64 kbit/s

<009>Channel ID i = 0xA98397

<009><009>Exclusive, Channel 23

<009>Calling Party Number i = 0x0081, '8135441611'

<009><009>Plan:Unknown, Type:Unknown

<009>Called Party Number i = 0xA1, '18004338836'

<009><009>Plan:ISDN, Type:National

001328: Oct 25 17:57:14.877: ISDN Se0/0/0:23 Q931: RX <- CALL_PROC pd = 8 callref = 0x8029

<009>Channel ID i = 0xA98397

<009><009>Exclusive, Channel 23

001329: Oct 25 17:57:15.629: ISDN Se0/0/0:23 Q931: RX <- PROGRESS pd = 8 callref = 0x8029

<009>Cause i = 0x82FF - Interworking error; unspecified

<009>Progress Ind i = 0x8281 - Call not end-to-end ISDN,

thanks in advance,


Re: Dropping In Progress Calls

What if all is set to unknown?

This one will be an trial-error or you can contact your Telco to see what they are expecting. Since as you can see this coming from your local Telco.

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