Obit SIP trunks on Mitel 5000

We recently ran some testing on an Obit SIP trunk to see if it worked OK with the Mitel 5000 pbx. Mitel have a range of suppliers who have tested with them, but a supplier of ours asked us to test Obit for them.  Below is the detail of the test setup and the programming done to get it all working. Hopefully it will help someone else.

Obit Trunk Testing.

Test equipment was :-

Mitel CS5000 software version 5.0

Netgear Prosafe FVS338 firewall, provided with a static public IP address. (Note this firewall runs completely different software to the cheaper FVS318’s). SIP ALG was turned off. The phone system was NAT’ed

The router was set with no port forwarding relating to SIP, rather the Ping option of the phone system to the obit server opens the port at a regular interval, allowing traffic to be sent inbound from the obit server to the phone system.

System was provided with SIP trunk license for each obit trunk.

A Sip Peer / Sip Trunk group was created.

Registration – Off           

Authentication – Not used

Keep Alive – Yes

                Ping Interval – 60

                Ping Failure threshold – 5

NAT settings – Non Sip Aware NAT

Alternate IP - Empty

Route Set – Empty

IP address – obit server ip xxx.xxx.xxx.xxx

Port number – 5060

FQDN – blank

Call Configuration – (Select a call config with G711 and 20msec playback delay buffer)

Operating State – (Set ‘In Service’ when config is finished)

Maximum Number of Calls – (To match amount of trunks purchased)

Use ITU-T E.164 – No

Static Binding – Yes

Use Peer Address in from Header – No

Trunk Group Configuration

Create a SIP trunk for each trunk purchased.

Call Routing table entries.

Should be in the format such that an inbound call to 01159610400 presents as

441159610400 in the left most column.

Extension Calling Party Number

Set in the format 01159610400 for each extension set to go outbound on SIP.

IP Settings

Set the ‘System NAT address’ to be the public IP address of the firewall.

IP Connections

P6xxx (the default is usually P6000) set the NAT address as the public IP of the firewall.

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