What is X21 interface?

21 (sometimes referred to as X21) is an interface specification for differential communications introduced in the mid-1970s by the ITU-T. X. 21 was first introduced as a means to provide a digital signaling interface for telecommunications between carriers and customers’ equipment.

What is v11 interface?

Interface Applications 21/V. 11 interfaces are used where high throughput and/or long distances are required. Commonly used bit-rates for synchronous communications are 64Kbps, 128Kbps, 256Kbps etc.

What is v35 modem?

V. 35 is a high-speed serial interface used for all line speeds that exceed 20 kbps. It supports higher data transfer rates (DTR) and connectivity between data communication equipment (DCE) and data terminal equipment (DTE) over digital lines.

What is modem in networking?

A modem is a network device that both modulates and demodulates analog carrier signals (called sine waves) for encoding and decoding digital information for processing.

What is v35 interface?

Basically, V. 35 is a high-speed serial interface designed to support both higher data rates and connectivity between DTEs (data-terminal equipment) or DCEs (data-communication equipment) over digital lines. Telephone circuits.

What is v35 protocol?

V. 35 is an International Telecommunication Union (ITU) Telecommunication Standardization Sector (ITU-T) specification originally standardized as an interface for 48 kbps line transmissions. V. 35 is a high-speed serial interface used for all line speeds that exceed 20 kbps.

What is V35 speed?

48 to 64 kbps
V. 35 combines the bandwidth of several telephone circuits to provide the high-speed interface between a DTE or DCE and an NTU (Network Terminating Unit). Although it’s commonly used to support speeds ranging anywhere from 48 to 64 kbps, much higher rates are possible.

What is v24 interface?

V. 24 is a single-ended interface, typically limited to a maximum throughput of 115Kbps. Communications distance is typically limited to 6m, the actual performance being mostly dependent on cable specification.

What are two types of modems?

Types of Modems

• Digital subscriber Line. It provides high speed internet connection through telephone lines.
• Cable modem. Cable Modem is a device that allows high-speed data access via a cable TV (CATV) network.
• Satellite modem. It is a device that provides internet connection through satellite dishes.

Why are modems used?

A modem modulates and demodulates electrical signals sent through phone lines, coaxial cables, or other types of wiring; in other words, it transforms digital information from your computer into analog signals that can transmit over wires, and it can translate incoming analog signals back into digital data that your …

What is g703 interface?

703 is a specific standard covering physical and electrical characteristics of a digital E1 interface. Under it, data can be travel over balanced (120-ohm) pairs or unbalanced (dual 75-ohm) coax wires; RJ-45 connectors are used for the balanced version, and a pair of BNC connectors is used for the unbalanced interface.

What is V35 cable?

V. 35 (V35) Cables are high-speed serial assemblies designed to support both higher data rates and connectivity between DTE’s (Data Terminal Equipment) or DCE’s (Data Communication Equipment) over digital lines.