Panasonic VL1700 Feature Manual

Panasonic VL1700 Feature Manual Manual pdf 35 page image

4.2 System Configuration—Extensions4.2.1 SIP (Session Initiation Protocol) ExtensionDescriptionThe Control Box supports the connection of SIP telephones. SIP extensions make and receive calls usingInternet Protocol (IP).SIP Video PhoneVideo phone calls can be established between SIP extensions with video phone capabilities.Conditions[General]• The Control Box supports SIP devices that use RFC 3261, 3264, 3310, 2327, or 4028.• Before a SIP extension can be used, the IP address of the main unit, password, and extension numbermust be assigned on both the SIP extension and the Control Box.For details on how to register, refer to the Installation Manual.• When registering the SIP extension, the user ID must be the extension number of the SIP extension.• DSP Resource UsageMaking a call from a SIP extension requires a certain number of DSP resources, depending on the codecused. If all DSP resources are in use, this operation cannot be performed.Installation Manual References4.6 Registering IP TelephonesPC Programming Manual References9.7 Control Box Configuration—[1-1] Configuration—Slot—V-SIPEXT128—Port Property4.2.2 Peer-to-Peer (P2P) ConnectionDescriptionThe Control Box automatically establishes peer-to-peer communication between extensions. With peer-to-peer calls, the call is routed directly from one SIP extension to another without going through the DSP card,which means that P2P calls are established without using the Control Box's resources.Conditions• Three codecs are used for peer-to-peer calls: G.722, G.711, and G.729A. The speech quality of thecodecs varies as follows: (High) G.722, G.711, G.729A (Low).When the preferred codec of each party differs, the call will be established using the lower codec. Forexample, if the caller prefers G.711 while the called party prefers G.729A, the call will be establishedusing G.729A.• The priority of the codec that will be used can be specified via the telephone itself.• For non-peer-to-peer calls via the DSP card, calls cannot be made or received when all of the card’sresources are being used.• The Control Box supports H.263/H.264 codecs for P2P video communication.4.2 System Configuration—ExtensionsFeature Manual 35