No Ringback or secondary dial tone on SIP Trunks

[mhumphries]

we have setup Flowroute SIP trunks that traverse through our Firewall.  the calls setup and tear down just fine but there is no secondary dial tone  or ring back.  i have it setup for test purposes to use a 9 to route the SIP trunk. ARS Digits Dialed  states the following
9 followed by 7 digits route to SIP trunk
91NXX followed by 7 digits route to SIP trunk
911 followed by 0 digits route to PRI

our default setup has 8 as the access to the PRIs
dial an 8 then we get secondary dialtone, then dial the remaining digits and it rings.

[mhumphries]

ok so i found the ARS Leading digits area and set 9 to yes for secondary dialtone, however we are still not getting ring back.  the SIP trace at the firewall shows that we are getting  a 180 ringing from the provider.

[x-man]

RTP ports?

[mhumphries]

does the ringing come through the SIP Trunk as RTP?  when i spoke to the provider they did not believe that it did.  that the 180 ringing should trigger the Mitel to provide the ringing???