Obihai 200/202 ATA Setup Guide

As of August 11, 2022, this link still works for downloading firmware version 3.2.2 (Build: 8680EX) for OBi200, OBi212, and OBi202 ATAs:
https://support.poly.com/support/s/arti ... re-Version.
I would download this file while you still can.
Version 1.50
Server Failover is back!!!
Major rewrite!
This is the version of the guide that will continue to be updated.
Version 1.51x
-- added link for optional instructions to create Tropo app to redirect anonymous callers
-- updated firmware version reference
Version 1.52 (January 21, 2018)
-- fixed a few typos I stumbled across
Version 1.53 (March 27, 2018)
- fixed some hyperlinks
- fixed some page references
Version 1.54 (April 2, 2018)
- mentioned the restriction (for incoming calls) of only one registration per FPL account being allowed on page 42
- added FAQ about rebooting the ATA on page 52
Version 1.55 (April 11, 2018)
- accidentally referred to RegisterRetryInterval as RegistrationRetryInterval on some pages
- accidentally referred to MTelemarketers as Mtelemarketers on one page
- fixed a grammar error (this is a long document, for me, that I'm often editing while I'm tired)
Version 1.60 (December 22, 2018)
- addressed a potential issue involving X_CheckPrimaryFallbackInterval that may cause temporary IP bans from FPL's Primary Proxy Server to persist (page 22)
- removed Tropo instructions since that service no longer works
- updated hyperlinks
- updated some general information
Version 1.70 (February 24, 2021)
- fixed all hyperlinks
- added information for Asus routers in preamble under Hardware Specific Issues
- updated some general information
Version 1.71 (May 24, 2021)
It's recommend that SIP Passthrough in the latest official Asus router firmware be set to Disabled. Enabling it is a potential security risk as is
enabling SIP ALG in general in many routers. In Asuswrt-Merlin, don't have SIP Passthrough set to "+NAT Helper". NAT Helper is the ALG.
The section on not needing to disable SIP Passthrough in Asuswrt-Merlin has been deleted.
Version 1.72 (July 31, 2021)
- added link for firmware 3.2.2 (Build: 8680EX) for OBi2XX series ATAs
Version 1.73 (September 17, 2021)
- a few hyperlinks were updated
Version 1.75 (September 24, 2022)
- DigitMap updated to support 988 Suicide Prevention Services as per https://support.fongo.com/hc/en-us/arti ... 1-911-etc-
- Notes added on Rogers XB7 and XB8 gateways
- Notes added on Asuswrt-Merlin SIP Passthrough/SIP ALG
- hyperlinks updated
I've kept version 1.43 on page 1 of this thread (down below) for those who need a version without server failover.