UC Collabing – A blog on VoIP, Cisco, CUCM, CUC, UCCX, IM&P, Gateways, SME, Asterisk, Mediasense, WebEx, Lync, Skype for Business, IP Telephony, Voicemail, IVR, VMWare, SIP, H.323, MGCP, SCCP, ISDN, E1, T1, PRI.

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Troubleshooting MWI SIP Cisco Unity Connection

Troubleshooting MWI SIP Cisco Unity Connection When a SIP Integration is done between CUCM and Unity Connection, MWI sometimes fails to work. I feel SCCP is more easier to troubleshoot when compared to SIP. SCCP uses MWI Directory Numbers to turn ON  and OFF Message

Troubleshooting DTMF in MGCP and PRI

WHAT IS DTMF? DTMF (Dual Tone Multiple Frequency ) is used to send signals for button presses on telephones. The data is typically sent over voice channels and so in order to distinguish from a human voice, when you hit a button the phone generates

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Configure Automated Attendant IVR on Asterisk

Configure Automated Attendant IVR on Asterisk Configure Automated Attendant or IVR (Interactive Voice Response) on Asterisk/FreePBX/Elastix to handle inbound calls to your organization. This can be achieved easily but it needs little planning like – What would be the Business Hours Greetings that caller would

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H323 Gatekeeper – RAS Messages

Hello All, H323 RAS Messages exchanged between the endpoints and the Gatekeeper. In the last post, we configured the Gateway (CME) and Gatekeeper. Today, let’s discuss about the RAS Messages exchanged between the endpoints and the Gatekeeper. Gatekeeper Discovery GRQ (Gatekeeper_Request) A message sent by