I have an Asterisk that has several employees connected to it. each person has their own DID and they can make/receive calls to/from PSTN - No problem there
I am looking for a viable option, to connect these users to a SMS gateway, however here is the trick: I need each user to send SMS to outside mobile with their DID number as FROM, also receive the replied SMS on their phone (outgoing SMS with a return Path) As far as volume, goes, I am looking long term, so I need high volume, cost is no issue.
Most options on SMS gateways look as they send out SMS as a bulk