Aastra Telecom 800 - Manual (Page 94)

PBX Networking Connections
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9. PBX Networking
Aastra 800 provides all the features necessary for PBX networking. You need PBX
networking in the following cases:
■ To operate the Aastra 800 as a subsidiary system on another PBX. This will also
allow you to use the Aastra 800 as a DECT server, for example.
■ To network the Aastra 800 with an OpenCom 1000. In this way you can use the
Aastra 800 as a PBX for a branch office, for instance.
■ To network several Aastra 800s into a PBX system.
■ To use flexible configuration possibilities of SIP trunks for a Aastra 800.
All settings that affect the configuration of PBX networking can be found in the
Configurator menu Telephony: Trunks and in the Telephony: Settings dialog
under QSIG linking. Refer also refer to the corresponding help topics in the
Aastra 800 online help.
You can use IP connections (Q.SIG-IP protocol) for TK system networking.
9.1 Connections
Networking two or more TK systems means interconnecting them. The Aastra 800
allows you to use the following connections:
■ SIP trunks
■ IP network connections (Q.SIG-IP)
Example of a PBX network
A Q.SIG-IP network connection can be established using a fast VPN connection.
When the connection is via internet, encryption is advisable for security reasons.
Q.SIG-IP connection
SIP trunk
PBX PBX PBX PBX
PBX