The company I work for is planning to replace its POTS lines with a PRI
line. The plan is to buy a block of phone numbers, some of which will
be used for phone, and the rest for fax.
We are now using a Norstar modular ICS switch (0X32), which routes
incoming phone calls according to the extension the caller dials. I
understand that a call coming in over a PRI line carries the called
number and that this feature is called DID. So, once we get PRI, we will
route calls based on DID. We would like to replace the Norstar switch
I have several questions:
Must we convert the company’s internal telephone infrastructure from
POTS to IP, or can we continue to use the old internal lines? (Using the
old lines, we won’t have to buy VoIP phones, thus saving us a lot money.
It would be even better if we could continue to use our Meridian phones.
But, see next question).
Our company has two separate buildings with a wireless IP connection
between them. Is there a way for Asterisk to route calls to the local
building using the old internal POTS lines, but to use VOIP to route
calls to the remote building?
Is there additional hardware we need to buy in order to allow Asterisk
to route a call based on DID, or is something like a Digium PRI card all
We would like to route certain dialed numbers to a Hylafax fax server
sitting behind (from the point of view of someone outside the company)
Asterisk. Would the DID information of a call be visible to Hylafax,
or would it be stripped off by Asterisk? (If we can use our old phone
lines instead of VOIP for the phone network, I suppose we will have to
signal Hylafax the called number using a method other than DID. Would
Asterisk need to do something like DID to DTMF translation in that case?)