• How many digits will XTIUM send to the PBX? (0-10, Default is 10)
• How many SIP Trunks (call paths) are we providing? (up to 23 per PRI, SIP is not restricted)
• What is the signaling with the PBX? (SIP/PRI) 
  • If PRI, what is the switch type? (4ESS/NI2, NI2 is Default – T1 defaults will be ESF/B8ZS)
  • If PRI, will the PBX or the PRI be the clocking source? ( PRI is default)
  • If PRI, XTIUM will be the DCE.
  • If SIP, what will the PBX send as its user agent ( device type)?
  • If SIP, does the equipment support the REGISTER method?
• Will the PBX be redirecting calls outbound via the trunk?
  • If yes, what IP will traffic come from?
• What is the physical location (city, State) of the PBX?
• Do we need to setup Call Forward Not Reachable?  This means that XTIUM will automatically route calls to another number in the event of PRI failure.
  • If yes, where should the calls go during an outage?  All calls on a trunk group route to a single number. Individual number routing incurs additional charges.

Questionnaire file: