IP Network Connections
PBX Networking
233
Connection via Q.SIG.IP
The Forum 5004/5008/5012 communications system supports
transmission of the Q.SIG protocol – intended for ISDN point-to-point
connections – via network connection (Q.SIG-IP). Protocol and call data are
exchanged using IP connections with Q.SIG-IP.
Note:
A network connection between two Forum communications
systems via Q.SIG-IP requires at least one license (Forum QSIG-
IP). The number of purchased licenses defines the number of
simultaneous calls.
The number of simultaneous calls depens – apart from the purchased
number of licenses – also depends on the network or internet connection
capacity and the compression procedure. A multiple S
2M
point-to-point
connection is simulated for each Q.SIG-IP bundle. This means that 5 virtual D
channels and up to 120 voice channels are available. Q.SIG-IP connection
data are subject to codec compression (please refer to
starting on page 155). Q.SIG-IP also
transfers the voice data directly from terminal to terminal via the RTP
protocol. In certain cases, for example, when an incoming external call is
placed via multiple TK systems, one or more RTP proxies may be used to
forward the connection.
Currently, there are no standards for the necessary extensions to the Q.SIG
protocol. This means that you can only use Q.SIG-IP between Forum
communications systems.
ForumGo to the
Telephony
:
Trunks
:
Trunk group
page in the
Configurator
to
set up a Q.SIG-IP connection. Create a new bundle and select the
Access type
“System Access”. Select “Q.SIG-IP” under
Protocol
. Configure the IP address
of the other system, the port numbers to be used, the number of possible
voice connections. Select a VoIP profile for the codec selection. Please refer to
the relevant help topics in the Online Help for the Forum 5004/5008/5012
as well.
Note:
Q.SIG-IP cannot be operated using a connection with NAT. For a
Q.SIG-IP connection, a VPN connection is required.
