Connectors
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This document discusses various common networking hardware components and connectors. It describes connectors such as BNC, DB, RJ, fiber optic SC and ST connectors, and the SCSI interface. BNC is used for thinnet coaxial cabling. DB connectors connect data terminal equipment and come in various pin configurations. RJ connectors are used for twisted-pair cabling, with RJ-45 being common for Ethernet. SC and ST are fiber optic connectors, while SCSI is an interface for connecting peripherals.
Connectors
- 1. Network Hardware Components --Mahesh Enumula
- 3. Connector • A device that terminates a segment of cabling or provides a point of entry for networking devices such as computers, hubs, and routers. • Connectors can be distinguished according to their physical appearance and mating properties, such as jacks and plugs (male connectors) or sockets and ports (female connectors).
- 4. • They can also be distinguished by their different pinning configurations, such as DB9 and DB15 connectors, which have 9 and 15 pins, respectively. • In addition, connectors are distinguished by the kind of electrical interfaces they support.
- 5. Examples of connectors • Connectors for serial interfaces, such as RS- 232 and V.35 • Ethernet connectors, such as RJ-45 and BNC connectors • Fiber-optic cabling connectors, such as SC and ST connectors
- 6. Common networking and Telecommunications connectors
- 7. Common networking and telecommunications connectors-2
- 8. BNC connector • BNC connector is a series of connectors used for connecting thinnet coaxial cabling to various networking components. BNC connectors use a twist-and-lock mechanism that provides a secure connection between network cabling and components.
- 9. • BNC cable connector: Soldered or crimped to the ends of a thinnet cable • BNC T-connector: Used to connect a network interface card (NIC) to a thinnet cable segment • BNC barrel connector: Used to connect two pieces of thinnet cable • BNC terminator: Provides a 50-ohm termination for the free end of a thinnet cable
- 10. DB connector • DB Connector is any connector used for connecting data terminal equipment (DTE). The letters “DB” stand for “data bus” and are followed by a number that indicates the number of lines or pins in the connector. • DB connectors were formerly called D-series connectors. DB connectors can be used for either serial or parallel connections between devices. Common members of the DB family include the following:
- 11. • DB-9, a 9-pin serial connector for connecting modems, serial printers, mouse devices, and so on • DB-15, a 15-pin connector for connecting such devices as Macintosh monitors and network interface cards (NICs) for 10Base5 drop cables • DB-25, a 25-pin connector for connecting Macintosh Small Computer System Interface (SCSI) devices, modems, serial printers, parallel cables, switch boxes, and so on • DB-37, a 37-pin connector for connecting such devices as routers and Channel Service Units (CSUs) • DB-60, a 60-pin connector for connecting such devices as Cisco routers
- 13. V series • V series is a series of communication standards developed by the International Telecommunication Union (ITU). • V series protocols define methodologies for exchanging data over the public telephone system by using telecommunications devices such as modems and multiplexers. Various V series protocols define interfaces between data terminal equipment (DTE) such as computers and data communications equipment (DCE) such as modems, or signaling methods for use over the public telephone system
- 15. RJ Connectors RJ Connectors are a family of push-and-click connectors for twisted-pair wiring in telephone and network wiring. RJ stands for Registered Jack. RJ types define both a jack or receptacle (female) and a plug (male) type of connector.
- 17. The most common types of RJ connectors • RJ-11 connector: A 4-wire or 6-wire telephone-type connector that connects telephones to wall plates. RJ-11 supports up to six wires, but usually only four are used with the two-pair twisted-pair cabling commonly found in telephone cabling. • RJ-45 connector: An 8-wire telephone-type connector used with twisted-pair cabling for connecting computers, wall plates, patch panels, and other networking components. RJ-45 is the standard type of connector for both unshielded twisted- pair (UTP) and shielded twisted-pair (STP) cabling in star-topology Ethernet networks such as 10BaseT and 100BaseT4. RJ-45 is defined in International Organization for Standardization (ISO) standard 8877. • RJ-48 connector: An 8-wire telephone-type connector used with twisted-pair cabling for connecting T1 and 56-KB digital data service (DDS) lines. RJ-48 uses the same jack as RJ-45 but uses a different pinning, with one pair of wires to transmit signals, one pair to receive signals, one pair for drain, and one unused pair (reserved for future use). RJ-48 connectors come in three varieties: RJ-48C and RJ- 48X for connecting T1 lines, and RJ-48S for connecting 56-KB DDS lines
- 18. Fiber Optic Connectors • SC/ST connectors are used for connecting fiber-optic cabling to networking devices. SC stands for subscriber connector and ST stands for straight tip..
- 19. • SC stands for subscriber connector and is a standard-duplex fiber-optic connector with a square molded plastic body and push-pull locking features. SC connectors are typically used in data communication, CATV, and telephony environments. • ST stands for straight tip, a high-performance fiber-optic connector with round ceramic ferrules and bayonet locking features. ST connectors are more common than SC connectors. • You can generally use SC and ST connectors with either single-mode or multimode fiber-optic cabling. Coupling receptacles for these connectors come in either panel- mount or free-handing designs. For narrow space installations, you can get 90-degree boot versions instead of straight versions. SC and ST connectors come in both simplex and duplex form.
- 21. SCSI • SCSI stands for Small Computer System Interface, is a hardware bus specification for connecting peripherals to a computer using a parallel transmission interface.