[asterisk-biz] Is ISP Blocking VoIP

[Bill Michaelson]

Er... Scratch the ssh suggestion - which is not workable (I was thinking 
clearly). - but you get the idea.

Bill Michaelson wrote:

> Try [ssh] tunneling VoIP with one of them, just to see what happens?
>
> J Thomas wrote:
>
>> I provide hosted PBX service to businesses. About a dozen of them. All
>> of them were working great, but this morning suddenly, 3 places have
>> gone dead. None of the phones from those three places would register
>> with my server :-(
>>
>> As the remaining 10 places are working just fine, hence I am reluctant
>> to blame this failure on Asterisk.
>>
>> Changes is firewall setting at customer site could be a cause, but very
>> unlikely that three of them decided to do that at the same time.
>> Moreover, I specifically asked all three of them and none of them have
>> messed up with their routers.
>>
>> Only thing common among them is that they all have business DSL from
>> Verizon. Could it be that, possibly inadvertently, Verizon is doing
>> something that is blocking VoIP? In any case, how to to find out why
>> VoIP is not working?
>> In this case, all the clients have Polycom phones, about 30 among all
>> three.
>>
>> Thanks,
>> -- jt
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>
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