Configurations of GSM/VoIP networks allow the service providers to avoid the local Wired Public Switched Network (PSTN) in communication with a GMS mobile handset. As a result, the high rates charged by telephone companies are avoided.
Carolina Digital Phone delivers IP-based Fortune-500 PBX features with Polycom phones as your only hardware investment. No other equipment or software is needed. Companies of any size to achieve a great business phone system with a full suite of PBX featu
Read more