Pros	Cons
Self Installable & Maintainable Inexpensive to buy and operate Good usable feature set for most businesses Reliable Digital operation Doesn’t require data cabling Phone available in two colors (Black and Titanium)	Fixed software – No upgrade path No remote programming (Telco Depot support) No remote phones SIP Trunks require external adapter

SIP (Session Initiation Protocol)
Internationally recognized IP telephony signaling protocol used for VoIP. This is the most widely used protocol in the market and is a standard meaning anybody who builds a SIP 2.0 compliant product should work with any other SIP 2.0 compliant device. For instance our Talkswitch is compliant so any off the shelf SIP phone will work as an endpoint for a home phone or a remote worker. The trick with SIP 2.0 is that the combined devices will work to the feature set of the lowest common denominator meaning a SIP 2.0 telephone only support 80% of the SIP feature set then even though the telephone system supports a higher set of features, you will only have the base features of the phone.

SIP Trunk
A new industry sprang up around providing lines via SIP as an alternative to analog or digital lines. These new trunks typically provide cost advantages and some feature advantages over the older counterparts. The best know early seller of SIP trunks for your residence is Vonnage, but now older and more stable companies offer SIP including the traditional telephone and cable companies. Telco Depot offers its own branded SIP Trunks which bring you tremendous savings and give you hardware and SIP Trunks from one vendor.