Primary/Secondary IP Office servers support SIP, H323and IP Office lines.

• For Linux-based expansion server external trunks: See Linux Expansion Server.

• For IP500 V2 expansion server external trunks: See Maximum IP500 V2 Trunk Capacity.

• For inter-IP Office trunks (IP Office lines): See Multi-Site Network Links (IP Office Lines).

  • H323 trunks are distinct from IP Office Lines but are taken from the same capacity pool.

1. Assumes virtual machine profiling as detailed in "Deploying IP Office Servers as Virtual Machines".

2. Unless otherwise stated, R240 and R260 servers capacities are equivalent.

3. The Total SIP Trunk Calls figure is the maximum number of concurrent SIP trunk calls/sessions for one system. They can be distributed over one or more trunks on the same system.

4. SIP trunk concurrent call capacity is also limited by available licenses and the SIP Line > SIP URI > Max Calls per Channel setting and the maximum server call capacity. See Call Capacity.

5. The number of SIP trunk session licenses requested by each system is defined by the Maximum SIP Sessions setting on the License > Remote Server > Reserved Licenses tab of IP Office Server Edition Manager. One available SIP Trunk session license enables one concurrent SIP session or call.

6. The maximum number of configured URIs per SIP trunk is 150. This is not correlated with maximum SIP trunks or concurrent calls or sessions.

7. The above figures are a theoretical maximum; other factors can reduce what can be utilized on a concurrent basis:

   • Available licenses

   • Trunk configuration

   • Maximum server call capacity

   • IP infrastructure