New Training: Cisco Collaboration: Configure Voice Gateway Elements
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New Training: Cisco Collaboration: Configure Voice Gateway Elements

In this 6-video skill, CBT Nuggets trainer Lalo Nunez reviews and configures several voice gateway elements such as dial peers, voice translation rules and profiles and DTMF. Watch this new Cisco training.

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This training includes:

  • 6 videos
  • 57 minutes of training

You’ll learn these topics in this skill:

  • Intro: Voice Translation Rules and Profiles
  • Voice Translation Rules Demo Part 1
  • Voice Translation Rules Demo Part 2
  • Voice Translation Profiles Demo Part 1
  • Voice Translation Profiles Demo Part 2
  • Voice Translation Show Commands

Can Cisco VoIP Systems Pass Touch Tones?

Dual-tone multi-frequency (DTMF) is an important part of making telephony services work properly. DTMF is also known as touch-tone dialing. Touch tone dialing sends out sounds with multiple frequencies over the phone line. Telephone networks use those touch tones to register the digits being pressed on a telephone keypad. These are what telephony networks use to route calls properly. IVR systems also use these touch tones to register user input as well.

Cisco telephony solutions can produce these touch tones through IP-enabled voice networks. These touch tones are processed by the DTMF relay.

The DTMF relay passes those touch tones using a signal protocol, either SIP or H323, instead of using the RTP media stream. The VoIP compressed audio stream can cause loss of integrity for touch tones. As such, the DTMF relay regenerates those touch tones transparently on the peer side.

Configuring the DTMF relay includes various settings based on things like the protocol being used for the VoIP system. For more information regarding the DTMF relay, visit its documentation page in Cisco's knowledge base.

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