Hi Rob, Managed to resolve the issue! It was the end nothing to do with firmware. Apparently there were some Routing/firewall changes made and since the CME is on the other side of the FW from the LAN, the IPS on the FW was dropping some packets after all!. Thanks for the response and the effort to help. Regards ... View more

Hi Rob, Thanks for your prompt response. Incidentally the phone in question is on Hardware Revision 16 yet it DID downgrade to Firmware version 9.0.2sr2 from 9.3.1sr2 !! See below the lines from accessing the phone in questions http page Cisco Unified IP Phone CP-7942G ( SEPD0C789D671DC ) MAC Address             D0C789D671DC Host Name                              SEPD0C789D671DC Phone DN App Load ID                              jar42sccp.9-0-2ES3.sbn Boot Load ID                              tnp42.9-3-1-57.bin Version                                             SCCP42.9-0-2SR2S Hardware Revision                         16.0 Serial Number                              FCH17219Q7M Model Number                              CP-7942G Anyy further tests I can do or provide information to resolves this mystery? Regards Lucky19th ... View more

Hi Aaron, I checked the setting and currently it is set too "release to switch". How do I establish what the CLID is when the calls are going back and forth from the two systems? I suspect that might help troubleshooting the issue Thanks ... View more

Hi Boris, Thanks for your time. I have checked the cable and handset. They are fine on a standard analog line. I tried picking up the handset while ringing the DN ( the status light was ON on the vg202) but the handset was not responding in any fashion. Please see the configs you mentioned below. lonfgw01#sh mgcp MGCP Admin State ACTIVE, Oper State ACTIVE - Cause Code NONE MGCP call-agent: 10.22.16.42 2427 Initial protocol service is MGCP 0.1 MGCP validate call-agent source-ipaddr DISABLED MGCP validate domain name DISABLED MGCP block-newcalls DISABLED MGCP send SGCP RSIP: forced/restart/graceful/disconnected DISABLED MGCP quarantine mode discard/step MGCP quarantine of persistent events is ENABLED MGCP dtmf-relay for VoIP is SDP controlled MGCP dtmf-relay for voAAL2 is SDP controlled MGCP voip modem passthrough mode: NSE, codec: g711ulaw, redundancy: DISABLED, MGCP voaal2 modem passthrough disabled MGCP voip modem relay: Disabled MGCP T.38 Named Signalling Event (NSE) response timer: 200 MGCP Network (IP/AAL2) Continuity Test timer: 200 MGCP 'RTP stream loss' timer disabled MGCP request timeout 500 MGCP maximum exponential request timeout 4000 MGCP rtp unreachable timeout 1000 action notify MGCP gateway port: 2427, MGCP maximum waiting delay 3000 MGCP restart delay 0, MGCP vad DISABLED MGCP rtrcac DISABLED MGCP system resource check DISABLED MGCP xpc-codec: DISABLED, MGCP persistent hookflash: DISABLED MGCP persistent offhook: ENABLED, MGCP persistent onhook: DISABLED MGCP piggyback msg ENABLED, MGCP endpoint offset DISABLED MGCP simple-sdp ENABLED MGCP undotted-notation DISABLED MGCP codec type g711ulaw, MGCP packetization period 20 MGCP JB threshold lwm 30, MGCP JB threshold hwm 150 MGCP LAT threshold lwm 150, MGCP LAT threshold hwm 300 MGCP PL threshold lwm 1000, MGCP PL threshold hwm 10000 MGCP CL threshold lwm 1000, MGCP CL threshold hwm 10000 MGCP playout mode is adaptive 60, 40, 1000 in msec MGCP Fax Playout Buffer is 300 in msec MGCP media (RTP) dscp: ef, MGCP signaling dscp: af31 MGCP default package: line-package MGCP supported packages: gm-package dtmf-package trunk-package line-package                          hs-package rtp-package atm-package ms-package dt-package                          mt-package sst-package fxr-package md-package MGCP Digit Map matching order: shortest match SGCP Digit Map matching order: always left-to-right MGCP VoAAL2 ignore-lco-codec DISABLED MGCP T.38 Max Fax Rate is DEFAULT MGCP T.38 Fax is ENABLED MGCP T.38 Fax ECM is DISABLED MGCP T.38 Fax NSF Override is DISABLED MGCP T.38 Fax Low Speed Redundancy: 0 MGCP T.38 Fax High Speed Redundancy: 0 MGCP Fax relay SG3-to-G3: ENABLED MGCP Fax relay ANSam suppression: DISABLED MGCP control bind :DISABLED MGCP media bound to interface FastEthernet0/0 MGCP Upspeed payload type for G711ulaw: 0,  G711alaw: 8 MGCP Dynamic payload type for Cisco fax indication: 96, Cisco fax ack: 97 MGCP Static payload type for G.726-16K codec MGCP Dynamic payload type for G.726-24K codec MGCP Dynamic payload type for G.726-32K codec MGCP Dynamic payload type for G.Clear codec MGCP Dynamic payload type for NSE is 100 MGCP Dynamic payload type for NTE is 99 MGCP rsip-range is enabled for TGCP only. MGCP Comedia role is NONE MGCP Comedia check media source is DISABLED MGCP Comedia SDP force is DISABLED MGCP g729 variants use static payload type and contain annexb in SDP MGCP Guaranteed scheduler time is DISABLED MGCP Disconnect delay error recovery DISABLED MGCP DNS stale threshold is 30 seconds lonfgw01#sh ccm lonfgw01#sh ccm-manager MGCP Domain Name: lonfgw01.fqm.internal Priority        Status                   Host ============================================================ Primary         Registered               10.22.16.42 First Backup    Backup Ready             10.22.16.41 Second Backup   None                     Current active Call Manager:    10.22.16.42 Backhaul/Redundant link port:   2428 Failover Interval:              30 seconds Keepalive Interval:             15 seconds Last keepalive sent:            08:15:26 GMT Feb 24 2012 (elapsed time: 00:00:11) Last MGCP traffic time:         08:15:26 GMT Feb 24 2012 (elapsed time: 00:00:11) Last failover time:             None Last switchback time:           None Switchback mode:                Graceful MGCP Fallback mode:             Not Selected Last MGCP Fallback start time:  None Last MGCP Fallback end time:    None MGCP Download Tones:            Disabled TFTP retry count to shut Ports: 2 Configuration Auto-Download Information ======================================= Current version-id: 1330012374-ae66f292-afff-42ec-a079-d2a948cbe118 Last config-downloaded:00:00:00 Current state: Waiting for commands Configuration Download statistics:         Download Attempted             : 1           Download Successful          : 1           Download Failed              : 0         Configuration Attempted        : 1           Configuration Successful     : 1           Configuration Failed(Parsing): 0           Configuration Failed(config) : 0 Last config download command: New Registration ... View more