IP Network Connections
PBX Networking
139
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 commu-
nications systems.
Note:
ForumTwo licences are required when networking two Forum
systems via Q.SIG-IP – a licence for each end point. The number
of possible call connections is not restricted by the licence.
Go 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 523/524 as well.
Note:
Q.SIG-IP cannot be operated using a connection with NAT. For a
Q.SIG-IP connection, a branch connection or another VPN
connection is required.
Connection via SIP tie line
The Forum 523/524 communications system supports connections using a
SIP tie line for TC system networking. A SIP tie line is a SIP line which requires
no login which can establish multiple call connections simultaneously. No SIP
provider is required for establishing the connection via SIP tie line.
The number of simultaneous conversations possible will depend on the
capacity of the network or internet connection and the compression method
used. The channels of a media gateway card are used for a SIP tie line (see
starting on page 100). The data of a SIP tie line
connection is subjected to codec compression (see under
starting on page 92 in the chapter
). Call data is trans-
mitted directly from terminal to terminal via the RTP protocol with SIP tie line
as well. In certain cases, for example when an incoming external call is
switched via multiple TC systems, there may be one or multiple RTP proxies
involved.
One of the special features of a SIP tie line connection is using transparent
codec interconnecting, for example to make use of HQ audio or video
telephony with appropriate terminals (see
Transparent codec interconnection
starting on page 97). In addition, you can find out what features are supported
Summary of Contents for forum 523
Page 1: ...Forum 523 524 Mounting and Commissioning Manual ...
Page 10: ...8 ...