Scenario#26 – Abbreviated Dial not working Cisco 7912

I was looking into this customer issue where they upgraded from Call manager 4.x to 7.x and almost all users on 7912 phone lost their speed dials. I checked the phones and CCMUSER page and found that the dials where there but they are not able to access it. Created a new Softkey template including “AbbrDial” at “off Hook” mode. Reset the phones and asked them to check. Customer came back saying they cannot see “AbbrDial” Softkey. All settings in Call manager were fine but for some reason they were not able to see the Abbreviated Dial Softkey. I checked … Continue reading Scenario#26 – Abbreviated Dial not working Cisco 7912

Scenario#25 – MoH file download from Call manager

Came across an MoH issue for a customer where the file was missing from Subscriber. As you may be aware that an MoH file should always be uploaded across the cluster on each server to work properly. If you only upload the MoH file on Publisher then it won’t be replicated on other servers. You can check that by going into those servers > Media Resources > Audio Source file. So..to cut long story short, I went back to customer to give me that wave file which was uploaded on Pub so that I can upload it on Sub as … Continue reading Scenario#25 – MoH file download from Call manager

Scenario#24 – SIP Calls drop after Silence

Came across a complex situation where customer was using this SIP trunk as an alternative to ISDN-30 (if all channels are used or if ISDN goes down). The ISDN-30 link was working fine but they had issues on SIP trunk (how many times I have heard this?) …. their outbound calls over SIP were using a prefix ‘8’ to route calls on SIP trunk to SIP Provider. The Outbound calls were working fine. The inbound calls drop after 8 secs and none of the calling/called party could hear each other. Complete silence.. Call flow was something like this: PSTN (81763)  … Continue reading Scenario#24 – SIP Calls drop after Silence

DSP, PVDM & Media Resources

The Cisco High-Density Packet Voice Digital Signal Processor (DSP) Module (PVDM2) enables Cisco Integrated Services Routers to provide high-density voice connectivity, conferencing, and transcoding capabilities in Cisco IP Communications solutions. PVDM stands for packet voice DSP module; it is the Cisco product name for the module that provides digital signal processing resources to a system. DSP stands for Digital Signal Processor; it is a generic Industry terminology. A PVDM module could be staffed with one or multiple DSPs. PVDM2-8 = 8ch (G), 4ch (H), 4ch (M) PVDM2-16 = 16ch (G), 6ch (H), 8ch (M) PVDM2-32 = 32ch (G), 12ch (H), … Continue reading DSP, PVDM & Media Resources

Restricting Access to Corporate & Personal Directory

How you can restrict access to corporate directory? If you remember, corporate directory is accessible globally from a cluster and restricting its access needs some configuration changes. In pre-CUCM 7.x you cannot accommodate it at individual level but in CUCM7.x you have flexibility. You can run a sql command to access corporate directory information from ‘enduser’ table. admin:run sql select userid,firstname,lastname,telephonenumber from enduser userid firstname lastname telephonenumber ====== ========= ======== =============== hqph1            hqph1 hqph2            hqph2 br1ph1           br1ph1 br1ph2           br1ph2 JTAPI            JTAPI In Pre-CUCM 7.x build you can disable corporate directory by following these steps: Go to Enterprise parameters and go … Continue reading Restricting Access to Corporate & Personal Directory

License Re-homing

I came across this customer where we upgraded their CUCM from 6.x to 7.x and changed the mother board of the UCS Server (there were some issues with it). After the upgrade the Call manager had major Licensing issues as the MAC address got changed. All the units went into negative and there was an error in red saying Call manager is running out of license blah blah.. There is a process of re-homing your license if the MAC address has been changed. One way could be to send any of the previous license files to Cisco licensing licensing@cisco.com asking … Continue reading License Re-homing

Scenario#20 – CCM Web Page Error – TFTP Management

I was uploading a firmware file for 7915-24 module across a clsuter of six CUCM servers when I came across this issue. I uploaded the file on three of them quite fine but the rest of the three servers were throwing a web page error when I was trying to access SFTP from FTP management. The error was something like this: The page was showing an exception and because of that I was not able to progress. I tried to access the servers from different machine but no joy. I then had to restart Cisco Tomcat service from CLI to … Continue reading Scenario#20 – CCM Web Page Error – TFTP Management