Voice over IP (VoIP) technology affords
companies a tremendous opportunity to extend the power
of their PBXs to remote offices and teleworkers without
having to pay for incessant use of the PSTN. Instead of using the PSTN, companies
can simply allow remote phones to connect to the PBX
via local IP connections, which are typically available
for an extremely low monthly rate. Usually
this economical IP connectivity is already in place,
since remote workers need access to both corporate
IT services and the Internet. With Quintum's Tenor
solution, remote offices and teleworkers can be easily
and inexpensively connected to corporate PBXs for
fullly functioning phone services.
Application Note:
http://www.quintum.com/files/pdf/FinalPBXRemoteOffice.pdf
PBX Extension