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Which Annex B ADSL router with PBXnSIP ?


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I'm experiencing problems with a Cisco/Linksys WAG54G2 ADSL2+ Annex B router, need Annex B because it's DSL over ISDN.


The problem is that the PBXnSIP server is via DMZ connected to the WAG54G2 and working fine. But I experience 2 problems.


No external phones can register, nor on IP nor on domain nor on dyndns.org (while other installations work 1 of these or all).


At strange moments (not particular a steady time, sometimes 1 day, sometimes 1 week, sometimes 2 weeks) no calling or being called is possible and the only solution is to power down/on the WAG54G2, which is annoying. (latest firmware installed)


Does anyone have experience with this router?


Does anyone have an advice which Annex B ADSL router works fine with PBXnSIP on a SBS2003 server (2 nics)?


Thanks in advance,


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