Now that we have installed Teams with Microsoft Business Phone System for clients (and passed the Teams exam) we want to share some thoughts on the product. We’ve been doing VoIP phone systems since Cisco CallManager 3 back in 2003 when it still looked like...
We changed a customer from PRI to SIP trunk and after the change, the Exchange UM stopped working for calls coming in from the outside. We found the following error in the logs: %VOICE_IEC-3-GW: CCAPI: Internal Error (Software Error): IEC=1.1.180.1.13.112 on callID...
Had an issue with an IP fax server (RelayFax with a Dialogic SR140 connecting via SIP trunk to an Adtran SBC) where inbound faxes were working fine and using T38 but outbound faxes were never negotiating T.38 and falling back to G.711 passthrough. As a result we were...
In order to restart or reset the SIP service on Cisco CallManager Express (CME) you can do the following: voice service voip sip call service stop no call service stop
One of our clients had an issue where their Unified Messaging arbitration mailbox had become corrupted. We were unable to change the audio files on the auto-attendants and we were seeing errors like this in the application logs: Event ID 1431 UM can’t save the...
The Cisco 881 router comes in an SRST flavor (C881SRST-K9) which includes 1 FXO and 4 FXS ports. We recently ran into a problem at a customer’s new install where the service provider did not run new FXO lines in time for the installation. So seeing that we had...
