SNR Issues when calling from EXTERNAL PSTN Number to RING Remote Destination number: Scenario: External PSTN Number —> Gateway —> CUCM—–>IP Phone —-(SNR –> RDP—>RD ) —>Gateway—-> External PSTN Number defined in the RD Normally SNR works for internal extensions only , If you need to allow SNR to work for External Calls you need to allow below parameters in the CUCM to generate the Call from Called ( Internal Extension ) As Suggested by…
Read MoreCSIM is an undocumented IOS command. When configuring a router to act as a voice gateway it is possible to test outbound calls by originating calls from the router. If the router is configured correctly then the far end number will ring and may be answered. Use the csim start dialstring hidden command to initiate simulated calls to whichever real-world E.164 number is desired. This allows you to determine whether you can properly go offhook…
Read MorePOTS-to-POTS Call Routing Considerations Occasionally, you must route calls between POTS dial peers. CAC might cause this, such as when a call from a PBX is denied admission to the WAN and sent back to the PBX. Or a call from an analog phone might be routed over the PSTN. The ability to switch calls between POTS dial peers is enabled by default on Cisco gateways. Many of the CAC mechanisms that are described in…
Read MoreBelow is the recommended config New phone model Recommended Fast-track config 7821 voice register pool-type 7821 xml-config maxNumCalls 6 xml-config busyTrigger 6 xml-config custom sshAccess 0 num-lines 2 description Cisco IP Phone 7821 reference-pooltype 6921 7841 voice register pool-type 7841 xml-config maxNumCalls 6 xml-config busyTrigger 6 xml-config custom sshAccess 0 num-lines 4 description Cisco IP Phone 7841 reference-pooltype 6941 7861 voice register pool-type 7861 xml-config maxNumCalls 6 xml-config busyTrigger 6 xml-config custom sshAccess 0…
Read MoreCME – How to collect Debug Logs ====================> How to enable Voice call Debug Filtering Voice call debug Filtering ————————– First configure the filter using “call filter match-list <tag> voice” and then use the filter as a debug condition using “debug condition match-list <tag> call filter match-list <tag> voice incoming calling-number <pattern> incoming called-number <pattern> incoming dialpeer <tag> incoming media local ipv4 <ip address> incoming media remote ipv4 <ip address> incoming port incoming signaling local…
Read MoreCisco IOS DSP Resources / Farm – Troubleshooting ==================> SCCP Registration Session show version show run show sccp all show dspfarm all show voice dsp group all show log Basic Debugs ———— debug ip tcp transaction debug sccp messages debug sccp error debug dsp-resource-manager flex dspstats debug dsp-resource-manager flex error Advanced Debugs ————— debug sccp packets ==================> Resources Allocation Errors show sccp connection show call active voice brief show call history voice brief show voip…
Read MoreCME Call Blocking Call Blocking Based on Date and Time http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucme/admin/configuration/guide/cmeadm/cmefac.html There have been many recorded incidents of business phone calls being placed After-hours, when staff has left for the evening. To prevent this you can implement After-hours call blocking on CME. After-Hours call blocking allows you to define ranges of times specified as After-hours intervals. User has an option to list a number of patterns that are not allowed during those intervals. If any user places…
Read Moreip dhcp pool phones network 192.168.10.0 255.255.255.0 option 150 ip 192.168.10.50 ! voice service voip allow-connections sip to sip sip registrar server expires max 1200 min 300 ! voice register global mode cme source-address 192.168.10.50 port 5060 max-dn 192 max-pool 58 load 7942 SIP42.9-1-1SR1S authenticate register authenticate realm lab.local tftp-path flash: file text create profile ! voice register dn 1 number 100 name Jack label Jack_100 ! voice register dn 2 number 200 name Paul…
Read MoreDedug SIP trunk from CM to CUBE From TAC The link below outlines how to enable detailed traces on CUCM cluster and collect them: Set Up Cisco CallManager Traces for Cisco Technical Support:http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a0080094e89.shtml Now this is the best bit of code i have seen in a long time! Enable SIP debugs, stores them in a txt file on the flash and when the error condition “503 Service Unavailable” happens do some show cmd and…
Read MoreCisco Voice Gateway Commands mostly used: Tracing a call flow sh isdn active !overview of calls going through the ISDN sh isdn service !overview of channels used within ISDN interface sh isdn status sh voice call status !gives called, codec and dial-peer info sh dial-peer voice summ !ports, coded, call setup state sh call leg active summary !codec, call type, dial-peer, ip address sh call active voice brief !overview of call leg numbers and…
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