Which XBLUE Phone Systems Use Standard Analog Telephone Lines?
XBLUE X16, X25, X50 & QB Systems Use Standard Analog Telephone Lines Our office phone systems are fully compatible with standard, analog telephone lines that are available from major local telephone companies. Depending on the XBLUE system, Digital or VoIP (voice-over-ip) technology may be used to facilitate on-site connection of telephones to the system’s communication […]