How to configure a SPA9000 For XO SIP

Unanswered Question

I have had XO flex T1 for 7 years, and finally got them to give me a SIP handoff without breaking the bank.  I am curious as to how I configure the SPA9000 with XO SIP Trunk.  We bought the SPA 2 years ago with FXS adaptors, and since XO had VOIP terminating as SIP, the latency was to much with the extra conversion, and we ended going back to our partner system.  Finally when we upgraded to bonded T1 because I need more upstream they gave me SIP trunk with POTS termination.  I would really like to use IP PBX now, but need some help on SIP settings, XO does not support the SPA but says they are compatible with all Cisco VOIP products.

Thanks So much in advance for your help.

I have this problem too.
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