Manager: Small Community Networking

The allowed arrangement of H323 SCN lines between the IP Office systems depends on the lowest software level of any IP Office system in the network. Note that we are referring to H323 SCN lines configured in the IP Office configurations. The actual IP network configuration, including IP routes in the IP Office configurations, can differ as per the customer network requirements.

Star/Serial Layouts
The following are examples of star and serial layouts. These are the only types of layouts supported for Small Community Networks containing any pre-IP Office 5.0 systems.

---- = IP network, | = IP Office H323 SCN Line.

Mesh Layout
The use of 'mesh' layouts connections is only supported for a Small Community Network of IP Office 5.0 systems. A mesh layout is one where there is more than one possible H323 SCN Line route between any two IP Offices. The following are examples of mesh layouts. Mesh, star and serial layouts can be combined.

SCN Signalling
IP Office SCN uses a signalling similar to RIP is order to update each other of there presence. This traffic can be seen in the IP Office System Monitor application as AVRIP packets.

This traffic is is sent to port 50795 on which each IP Office system listens.

Each IP Office in the SCN transmits an update every 30 seconds. Additionally BLF updates are transmitted when applicable up to a maximum of every 0.5 seconds. Typically the volume is less than 1Kbps per IP Office system.