Voice over IP (VoIP)
OpenPhone IPC
114
6.
The VoIP system telephone creates a second TCP connection using the sig-
nalling port number 8101 and sends a registration analogue to the U
pn
system
telephones.
7.
Extra connections are created using the IP protocol RTP (“Realtime Transport
Protocol”) for call data when a call is created. For calls between two VoIP system
telephones, port numbers above 8200 are used. For transmission to a Media
Gateway card, a port in the range 1024 – 1087 is used.
If you wish to operate a VoIP system telephone via a routed IP connection (for
example VPN or RAS) it may be necessary to configure an external DHCP server
accordingly. Please note the selection of the codec and keep-alive time for RAS
connections. This can be done by selecting the default profile
RAS
in the
PBX Configuration: Devices: VoIP Phones
for the VoIP system telephone. The
operations software provided via TFTP must match the type of device and com-
munication system. You may also need to configure BOOTP, DHCP and TFTP
servers for the VoIP system telephone.
9.5
OpenPhone IPC
Besides the hardware VoIP system telephones, PC software for VoIP telephony can
also be deployed. This software can be used with the operating systems
Windows 98 SE/ME and Windows 2000/XP.
Software VoIP system telephone OpenPhone 65 IPC with one keypad module
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