Hair-pinning Or redirecting a call from Gateway

There are times when you would like to forward a call coming into your gateway out to PSTN before it goes to Call manager. Reason could be WAN outage to Call managers or Call manager down situation. This is how you can route out an incoming call out of the gateway. Let suppose the mainlineContinue reading “Hair-pinning Or redirecting a call from Gateway”

Scenario#33 – Phones not registering CUCME

Interesting case today. I had a call from customer saying they had a power cut and when the power was restored all their phones went into ‘Registering’ status. I initially thought it could be a network issue from switches to CUCME gateway as the config was looking fine to me. I did a show ephoneContinue reading “Scenario#33 – Phones not registering CUCME”

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 buttonsContinue reading “Cisco 7931 Phone and Headset”

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: RXContinue reading “Scenario#22 – ISDN user busy 0x8091”

CME – Max calls, Busy Trigger & HuntStop

The concept of max-calls per button and busy trigger is quite easy but has been made complex. max-calls-per-button is used for maximum calls (incoming and outgoing) which can go through that line. busy-trigger-per-button is used to busy out incoming calls after the parameter set has been reached. So if an ephone has busy-trigger-per-button set toContinue reading “CME – Max calls, Busy Trigger & HuntStop”

CME – Automatic Line Selection

On multiline IP phones, lifting the handset automatically selects the first ringing line on the phone or, if no line is ringing, selects the first available idle line for outgoing calls. This is the default behavior for all multiline IP phones. It may be desired that a particular line be selected whenever an outgoing lineContinue reading “CME – Automatic Line Selection”

CME Intercom Lines

Intercom and Barge-IN: An intercom line is a dedicated two-way audio path between two phones. Cisco Unified CME supports intercom functionality for one-way and press-to-answer voice connections using a dedicated pair of intercom directory numbers on two phones that speed-dial each other. If we have to c0nfigure Intercom between two phones..lets say between a manager phone andContinue reading “CME Intercom Lines”

CME PerPhone command

You can use an external TFTP server to off load the TFTP server function on the Cisco Unified CME router. This is also important if your router is not a high end router while the CME configuration is complex with many phones and expansion modules. Also Using flash memory or slot memory on the Cisco Unified CME router allowsContinue reading “CME PerPhone command”

Scenario#19 – CME Phone not Ringing

This was a very interesting scenario I came across for this customer where these two phones were not ringing at all. Any incoming call and they would just flash. No Ringtone. I confirmed that the phones were working fine few days back but then suddenly started just flashing. One other phone in the same groupContinue reading “Scenario#19 – CME Phone not Ringing”