On System Tab, set Primary NTP to: time.nist.gov
On SIP Tab, set STUN enable to YES and set STUN Server to: stun.siptrunk.com
On Regional Tab,
Ring Waveform: Sinusoid
Ring Voltage: 95
CPC DELAY = .2
CPC DURATION = .6
Time Zone: EST= GMT-05:00, CST=GMT-06:00, MST=GMT-07:00, PST=GMT-08:00
Daylight Saving Time Rule: start=3/8/7/2:0:0;end=11/1/7/2:0:0;save=1
On Line 1 make sure SIP Remote Party-ID is YES
also make sure NAT Mapping Enable is YES and NAT Keep Alive Enable is YES
On Line 1 under Proxy and Registration:
Proxy: gw.siptrunk.com
Use DNS SRV: YES
DNS SRV Autoprefix: YES
On Line 1 under Subscriber Information:
Enter USER ID and Password from SIPTRUNK.com site (User = Trunk # and Password is SIPTRUNK.com Trunk Password)
On Line 1, USE THIS DIALPLAN: ([49]11|[933]|1xxx[2-9]xxxxxxS0|<:1>[2-9]xxxxxxxxxS0|<011:>x.)
***To ensure that inbound calls work properly, go to the "SIP Trunking" tab, and select "Modify Trunk." Then ensure that "Contact Override" is set to "OFF."***
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