IDSL is a symmetric service that provides DSL technology over existing copper telephone lines. IDSL is an always-on connection and is billed at a flat monthly fee. TransEdge IDSL comes with a routing solution which includes firewall software that protects your network from outside attacks.

DSL over ISDN - for folks who live too far away from the central office, IDSL may still be an alternative for high speed access. Limited to 144 Kbps

Slightly faster than basic BRI ISDN. It can achieve 144kbps instead of the normal 128kbps by using the 16kbps D channel for data rather than call setup. This setup has the longest distance available at 26,000 feet. Can be used with existing ISDN but not shared with analog phone systems. Symmetric, meaning both directions are transferring data at the same speed.

A form of DSL providing a symmetrical speed of 144 Kbps over the copper wire provisioned for ISDN. Repeaters enable service up to 35,000 feet from the CO.

IDSL is a symmetric service that provides DSL technology over existing copper telephone lines. Typically, this service is more expensive than other DSL services. However, this service can be provided to customer locations that are far away from the phone company Central Offices. Unlike IDSL, most other DSL services cannot be provided to distant locations.

A service designed to accommodate users that have already invested in ISDN. The service provides ISDN signaling at 144 Kbps over a DSL circuit, and plugs into existing ISDN equipment at the local carrier's CO.

ISDN Digital Subscriber Line - Uses ISDN transmission technology to deliver data at 128 kbps in an IDSL modem bank connected to a router. INTERNET PROTOCOL - Also known as IP is a data-oriented protocol used by source and destination hosts for communicating data across a network. Data in this IP inter network is sent in blocks referred to as packets or datagrams

ISDN Digital Subscriber Line. Speeds up to 144kbps are delivered without the usage charges inherent with ISDN service.

ISDN digital subscriber line, a DSL technology that is basically a naming convention for an ISDN Basic Rate Interface (BRI), both B channels and the D channels permanently bonded for 144 kbps over a single wire pair. ISDN digital subscriber line (IDSL) uses 2B1Q line coding.

ISDN Digital Subscriber Line. This is a type of DSL service that provides up to 144-Kbps transfer rates in each direction (slower than ADSL) and can be used regardless of the distance the customer is from the telephone central office (unlike ADSL).

Integrated Digital Subscriber Line. An ISDN based version of DSL using 2BIQ line code.

Integrated Services Digital Network. It uses existing ISDN technology and equipment to increase the data transfer over a long, bad, or noisy line. While IDSL will technically work up to 30,000 ft, our vendors only support IDSL on lines under 25,000 ft. IDSL is one of the only cases where electronics are used to benefit the installation, using repeaters to volt the DSL signal to make it travel the degraded line, and the Adtran unit which de-volts the signal before it enters your internal wiring.

This is an "always on" alternative to dial-up ISDN service with a capacity of up to 144 Kbps. IDSL has a larger reach than other DSL types. IDSL can be used at distances upwards of 26,000 feet.

ISDN DSL (128kbps).

ISDN-based Digital Subscriber Line

ISDN based DSL originally developed by Ascend Communications.

(ISDN Digital Subscriber Line) IDSL provides up to 144-Kbps transfer rates in each direction and can be provisioned on any ISDN capable phone line. Compared to ADSL and other DSL technologies, IDSL can be deployed to users at much further distances from the central offices, as well as to users who are not served directly from the central office but rather indirectly through DLCs (digital loop carriers) and other technologies.

ISDN Digital Subscriber Line. IDSL provides up to 144-Kbps transfer rates in each direction and can be provisioned on any ISDN capable phone line. Unlike ADSL and other DSL technologies, IDSL can be deployed regardless of the distance the user is from the central office.

ISDN Digital Subscriber Line. IDSL is a 128Kbps standard proposed by the Ascend Corporation for providing low-cost, dedicated 128Kbps data service using telephone lines and central office switch facility space leased from the telephone company. It uses standard Point-to-Point ISDN signaling techniques to link the customer to the central office headend. See xDSL.

ISDN based DSL developed originally by Ascend Communications.

Also called ISDN DSL. This is a form of DSL that supports symmetric data rates of up to 144 Kbps using existing phone lines. IDSL differs from its relative, ISDN, in that it is an "always-available" service, but capable of using the same terminal adapter, or modem, used for ISDN. Unlike true ISDN, it's only for data. It can reach farther distances than ADSL or SDSL.

ISDN Digital Subscriber Line; Combination of ISDN and DSL. Provides a 144 kbps connection.

ISDN Digital Subscriber Line. A digital communication protocol that uses an ISDN line and supports line rates up to 144 kilobits per second (kbps).

(ISDN Digital Subscriber Line) - The always-on cousin of dial-up ISDN. IDSL delivers a symmetric 144 Kbps of bandwidth, which is 16 Kbps more than the dial-up version of ISDN.

ISDN DSL. Uses 2BlQ line code.

DSL transferred at 128Kbps on regular copper lines. This uses ISDN transmission coding, but no form of dial-up.

A transmission medium that has a maximum loop length of 3.4 miles (5.5 kilometers), and it is deployed as a single twisted-pair cable that offers 128Kbps in each direction.