I have a friend with a small business running a small SIP based
phone system. He was looking into providing some SIP phones for a
couple of remote teleworkers, but as he started to look around and ask
me questions he ran across analog adapters which made him curious.
He proceeded to ask me if there was an analog adapter that
provided the following functionality in which my reply was simply, "I
don't know". I have NO experience with any analog adapters. I know
that the basic function is simple, the adapter creates the SIP session
if you will to the server. It then allows you to connect pretty much
any analog device of your choosing.
He however is wanting something that connects using both SIP to
the server and PSTN. But his request does not stop there. He wants to
be able to choose on the fly which "SIP or PSTN" connection he utilizes
for any given outbound call the user makes. Basically, analog adapter
connects to both voip pbx via sip, and PSTN. Analog phone connects to
analog adapter. User picks up phone and could ideally press say 8 to
make a call over the voip service or 9 to make a call over the attached
PSTN.
Sounds simple enough. And I know they do make adapters that
connect to both a sip voip service and to the PSTN via a FXS port.
Something like the Linksys SPA3102.
However I am not certain that these devices allow for the
individual to easily choose which service to use. I have to assume
they do because well otherwise I have a hard time understanding how
useful they would be otherwise.
I notice a couple of the features listed stand out as possibly
what they are looking for but any clarification from others with more
experience and personal knowledge would be helpful.
Features listed:
Service Authentication via PIN,
Digest, Caller ID (Bellcore Type 1)
Per Call Authentication and
Associated Routing
Appreciate any responses.
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