Many companies continue to rely on traditional phone systems, including trunk line telephone setups, to connect with clients ...

An organization that provides voice over IP (VoIP) service and enables calling from SIP phones to plain-old-telephone (POTS) lines and vice versa. SIP is the universal protocol used for Internet ...

SIP is a protocol that gives you a unique identification (a SIP number or address) on the internet that you can use as a ...