The following definition for DTMF comes from Wikipedia
"Dual-tone multi-frequency (DTMF) signaling is used for telephone signaling over the line in the voice-frequency band to the call switching center. The version of DTMF used for telephone tone dialing is known by the trademarked term Touch-Tone, and is standardised by ITU-T Recommendation Q.23. Other multi-frequency systems are used for signaling internal to the telephone network."
Created by: oej,Last modification on Mon 10 of Sep, 2007 [12:29 UTC] by pgaz
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I added a page about Cisco power supply bricks and I'm unsure whether there is a common plug for these phones that take 48v input jacks, since the power supply I got had a slightly differing connector. Please add the details there if you have them.
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