2N Helios IP Configuration Manual page 71

5.4.1 Phone
The Phone service is one of the basic functions of the intercom: helps you establish
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connections with other IP network terminal equipment. The 2N Helios intercoms
support the extended SIP and are compatible with and certified by the leading SIP PBX
and terminal equipment manufacturers (CISCO, Avaya, Broadsoft, etc.).
The intercom supports up to five parallel calls: 1 outgoing and up to 4 incoming calls.
Just one of the calls can be active – the audio stream is interconnected with the
microphone and speaker and video stream with the camera. The other calls are always
inactive – the microphone and speaker are muted, the intercom receives the DTMF
characters for the opponent to control the intercom (activate/deactivate profiles, users,
etc.).
Typically, the intercoms are used for outgoing calls and incoming calls are inactive –
the microphone and speaker are muted. However, you can configure your intercom to
make incoming calls active and ringing; refer to the Calls tab. Press the * and # keys
on the numeric keypad to answer and terminate an incoming call.
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The 2N Helios IP intercoms use the G.711 L16, G.722 , and G.729 protocols (with
a licence key) to encrypt or compress audio streams and the H.263 or H.264 codecs
to compress video streams. Broadband codecs L16 and G.722 are available in selected
2N® Helios IP models only. Choose your preferential codecs in the Audio or Video ta
b.
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2N TELEKOMUNIKACE a.s., www.2n.cz