Panasonic KX-NSX1000, Manual

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Depending on the registration status of the wireless handsets, up to 8 activation keys for IP-PT/P-SIP
may be required.
•
P-SIP phones are counted as general SIP phones and, therefore, are included in the maximum capacity
for general SIP phones.
Installation Manual References
4.4 Virtual Cards
PC Programming Manual References
9.17 PBX Configuration—[1-1] Configuration—Slot—V-SIPEXT128—Card Property
9.18 PBX Configuration—[1-1] Configuration—Slot—V-SIPEXT128—Port Property
5.2.3 Peer-to-Peer (P2P) Connection
Description
This PBX automatically establishes peer-to-peer communication between peer-to-peer compatible IP
extensions (i.e., IP-PTs and SIP extensions) and SIP Trunks that belong to the same P2P group. With peer-
to-peer calls, the call is routed directly from one IP extension to another without going through a DSP card,
which means that P2P calls are established without using the PBX’s resources.
P2P Scenarios
P2P calls can be established between telephones in a single site or across sites. The following illustrations
show P2P calls established in a variety of network configurations. It is assumed that all the devices are
connected over a private IP network.
P2P connection within a site
Site 2
P2P
Router Router
PBX
Site 1
P2P
PBX
Calls between IP telephones within a site establish a P2P connection.
Conditions
[General]
•
Three codecs are used for peer-to-peer calls: G.722, G.711, and G.729A. The speech quality of the
codecs 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. For
example, if the caller prefers G.711 while the called party prefers G.729A, the call will be established
using G.729A.
•
G.722 is only available for calls between KX-NT300 series IP-PTs, KX-NT500 series IP-PTs, and some
SIP extensions that support this codec during peer-to-peer communication.
•
Through system programming, it is possible to assign the preferred codec to use for IP-PTs.
5.2.3 Peer-to-Peer (P2P) Connection
398 Feature Manual