Have you looked at other instructions?
CC
»
www.callcentric.com/supp ··· tone_702Voip.MS
»
wiki.voip.ms/article/Gra ··· _-_HT702-----
And just make the appropriate substitutions for FutureNine.
SIP Server - outgoing.future-nine.com (if outgoing only) or incoming.future-nine.com (if both ways)
Outbound proxy- Leave blank OR try same as SIP Server entry
User ID: [YOUR FUTURE NINE 8 DIGIT ACCOUNT NUMBER] (not 6-digit!)
Password: [YOUR 10-CHARACTER PASSWORD]
Authenticate Password- your password
Preferred Vocoder- PCMU
Voice Frames per TX- 2
Register Expiration-3600
local SIP port-5060