Flat Rate Service is unmeasured, allowing the subscriber to make an unlimited number of calls within the local calling area at a fixed monthly rate plus tax. The monthly charge is billed one month in advance.
Message Rate Service
Message Rate Service bills the customer a flat monthly charge for a set number of local calls or messages per line, with an additional charge for every local message in excess of the base allowance. The monthly charge for the base allowance is billed one month in advance, with the excess messages billed in arrears. Local messages not used in one month may not be credited to another month.
Measured Rate Service
Measured Rate Service bills the subscriber a flat monthly rate that includes an arbitrary monetary usage allowance for calls completed to stations in the local calling area. Charges for local calls in excess of the allowance are also applicable and are based upon length of call, originating and terminating point of call, and time of day call made. The flat monthly charge is billed one month in advance with usage charges summary billed in arrears.
The following are technical specifications for business line services. These specifications adhere to national standards including TR-TSY-000560, Individual Line and ANSI T1.401. The specifications may be used in requests for proposal of Local Exchange service.
Refers collectively to all types of digital subscriber lines, the two main categories being ADSL and SDSL. Two other types of xDSL technologies are High-data-rate DSL (HDSL) and Very high DSL (VDSL).
DSL technologies use sophisticated modulation schemes to pack data onto copper wires. They are sometimes referred to as last-mile technologies because they are used only for connections from a telephone switching station to a home or office, not between switching stations.
xDSL is similar to ISDN inasmuch as both operate over existing copper telephone lines (POTS) and both require the short runs to a central telephone office (usually less than 20,000 feet). However, xDSL offers much higher speeds - up to 32 Mbps for upstream traffic, and from 32 Kbps to over 1 Mbps for downstream traffic. Typical speeds are 1.5 Meg to 6 Meg download speed and 256 K to 768 K upload speed.
