Aastra OpenCom 100 series, Mounting And Commissioning User Manual

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PBX Networking
162
Connection via the Public Network
Point-to-point connections via the public network of a network operator can be used
for bridging distances beyond 50 km. Due to the long distance involved, for technical
reasons it is not possible to synchronise the L2 protocol. Consequently, the public
network is normally the protocol master for protocol layers L1 and L2. One PBX is
therefore the L3 master and the other PBX the L3 slave.
Point-to-point connection via a public network
IP Network Connections
If you are operating a fast and continuous network or internet connection at two or
more sites, you can also network the PBX systems via a network connection.
There are two different protocols available for networking TC systems via network
connections: Q.SIG-IP and SIP tie line. The various features of these protocols are sum-
marised in the following table:
TC system networking via network connections
Feature Q.SIG-IP
OC100 /
Aastra
800 Q.SIG-IP
OC1000 SIP
tie line
OC100 /
Aastra
800 SIP
tie line
OC1000 /
Aastra
5000
Establishing a call
(“basic call”) with call-
number transmission yes yes yes yes
name information
transmission yes yes yes yes
single number dial possible yes yes no no
transparent codec
interconnection no no yes yes
PBX 1
L1 slave
L2 slave
L3 master
PBX 2
L1 slave
L2 slave
L3 slave
Public
network
L1 master
L2 master