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. YouContinueContinue reading “Scenario#25 – MoH file download from Call manager”
Author Archives: asharsidd
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 usingContinueContinue reading “Scenario#24 – SIP Calls drop after Silence”
Cisco 7931 Phone and Headset
The Cisco Unified IP Phone 7931 includes 24 buttons that can be assigned to lines and call features. A 3-color LED provides call status information for each line. The line buttons are numbered 24-1 from top to bottom. The numbers do not appear on the phone. There are two ways how the top four buttonsContinueContinue reading “Cisco 7931 Phone and Headset”
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.ContinueContinue 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 fromContinueContinue reading “Restricting Access to Corporate & Personal Directory”
Scenario#23 – Fax Issues for ATA
Fax machines connected to ATA were not working. The first thing I checked on the gateway…is fax-relay was being used or fax protocol cisco was configured? Fax-relay is NOT supported by ATA. This is what I found at the Voice gateway: voice service voip allow-connections h323 to sip allow-connections sip to h323 allow-connections sip toContinueContinue reading “Scenario#23 – Fax Issues for ATA”
IOS 15.1 Toll Fraud feature
A new feature has been introduced in Cisco IOS® Software Release 15.1(2)T to guard against the incidence of toll-fraud on Voice GateWays (VGWs) installed with Cisco IOS. Starting with IOS 15.1(2)T and newer releases of IOS based on this version, the toll-fraud prevention settings are the default behavior of Cisco IOS-based VGWs. Behavior Before 15.1(2)TContinueContinue reading “IOS 15.1 Toll Fraud feature”
Scenario#22 – ISDN user busy 0x8091
This was an interesting scenario where incoming calls were getting ‘user busy’ message at the gateway and an engage tone was heard at calling party side. *Aug 18 08:36:53.581: ISDN Se0/0/0:15 Q931: RX <-CALL_PROC pd = 8 callref = 0x8D7E Channel ID i = 0xA9839E Exclusive, Channel 30 *Aug 18 08:36:54.997: ISDN Se0/0/0:15 Q931: RXContinueContinue reading “Scenario#22 – ISDN user busy 0x8091”
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 anContinueContinue reading “License Re-homing”
Scanario#21 – VG224 Fax Issues
Customer reported a fault that several fax machines which were working fine last week have suddenly stopped working. All they were getting for incoming faxes was just the header. No content of the actual fax. Rule of thumb – anything which was working before and not working now means something must have changed. I jumpedContinueContinue reading “Scanario#21 – VG224 Fax Issues”
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