Incoming call to MGCP gateway failing with invalid IE contents

[Deepak Mehta]

Team,

I can make outbound calls fine however issue is with incoming.Call is initiated from PSTN phone - SB Phone 

Below output is from SB MGCP gateway where call is coming in.

I have tried various options on MGCP gateway config in CUCM eg Display IE or redirecting IE support etc .Also on voice interface supplementary services command (isdn supp-service name calling ) is configured.

-------------------------------------------------------------------------------

pr 13 17:58:06.555: ISDN Se0/1/0:15 Q931: RX <- SETUP pd = 8  callref = 0x0080 

        Bearer Capability i = 0x8090A2 

                Standard = CCITT 

                Transfer Capability = Speech  

                Transfer Mode = Circuit 

                Transfer Rate = 64 kbit/s 

        Channel ID i = 0xA98381 

                Exclusive, Channel 1 

        Facility i = 0x9F8B0100A11802010302010080105369746543204C6F63616C205053544E 

                Protocol Profile =  Networking Extensions 

                0xA11802010302010080105369746543204C6F63616C205053544E 

                Component = Invoke component 

                        Invoke Id = 3 

                        Operation = CallingName 

                                Name Presentation Allowed Extended

                                Name = SiteC Local PSTN 

        Display i = 'SiteC Local PSTN' 

        Calling Party Number

R3# i = 0x4181, '70054000' 

                Plan:ISDN, Type:Subscriber(local) 

        Called Party Number i = 0xA1, '70044001' 

                Plan:ISDN, Type:National

Apr 13 17:58:06.559: ISDN Se0/1/0:15 Q931: TX -> RELEASE_COMP pd = 8  callref = 0x8080 

        Cause i = 0x80E4 - Invalid information element contents>>>>>>>>>>>

[Deepak Mehta]

Any expert opinion here ...

As i have not been able to overcome this problem from last few days now.thank you

[Ayodeji Okanlawon]

Try and remove the facility ie in cucm for the gateway. Go to the mgcp gateway in CUCM and uncheck the facility ie box. Then do a no mgcp, followed by mgcp to restart the mgcp process

[Deepak Mehta]

Thank you, Ayodeji.

Facility IE option is grayed out, I am not too sure why.

Coulf it be becuase I am using E1 and PRI protocol is Euro?

I did try other enabling other options but I still see facility IE in incoming call. 

[Nadeem Ahmed]

could you please send the show run along with below debugs for one test

debug isdn q931

debug mgcp packets

debug mgcp events

debug mgcp error

Br,

Nadeem

[Deepak Mehta]

Below GW config screenshot.You can see Facility IE is grayed out.

[Ayodeji Okanlawon · Accepted solution]

Ok. It is greyed out because it is not supported on this setup. Please change the PCM type from a-law to u-law. Ensure you reset the mgcp process by doing

conf t

no mgcp

mgcp

[Deepak Mehta]

Thank you so much !! it worked.

Appreciate your help .