Interface cable standard for LAN and WAN

I. LAN interface cable standards

1, 10Base-T: twisted pair cable, generally use RJ-45 connector; maximum effective transmission distance is 100 m from the hub, even the high-quality Category 5 twisted pair can only reach 150 m. The matching resistance is 120 Euro.

2. 10Base5: coarse coaxial cable with plug-in connector and baseband signal. The maximum supported length is 500 m and the maximum segment is 100. The matching resistance is 75 Euro.

3. 10Base2: thin coaxial cable. The connector adopts the industrial standard BNC connector to form a T-type socket. The connector is only 200 meters and only 30 computers can be used in each segment, the maximum number of segments is 30. The matching resistance is 50 euro.

4. 100Base-TX: cat-5e twisted pair wires. the maximum length of the CIDR block is 100 MB.

5. 100Base-FX: a pair of multimode or single-mode optical fiber cables can reach a maximum distance of 2 km from the computer to the hub, and a maximum of 10 km from a single-mode optical fiber.

6. 1000Base-T: Use cat-5e twisted pair wires. the maximum length of the CIDR block is 100 MB.

7. 1000Base-F: a pair of multi-mode or single-mode optical fiber cables. When using multi-mode optical fiber cables, the maximum distance between the computer and the hub is 300-550 m (500 m ), the maximum size of a single-mode optical fiber is 3 km.

1000Base-LX can be connected to single-mode optical fiber; 1000Base-SX can only be connected to multimode optical fiber. (3008)

Base-lx transmit 5 km with Single-Mode Optical Fiber

1000BASE-LX uses multi-mode optical fiber (50um) to transmit 550 m

1000BASE-LX uses multi-mode optical fiber (62.5um) to transmit 550 m

1000BASE-SX uses multi-mode optical fiber (50um) to transmit 275 m

1000BASE-SX uses multi-mode optical fiber (62.5um) to transmit 550 m

100BASE-FX Single-Mode module transmits 10-20 km Data Using Single-Mode Optical Fiber

100BASE-FX multi-mode module transmits 2 km Data Using Multi-Mode Optical Fiber

Ii. wan interface cable standards

1. E1: 64k-2Mbps.

2. X25: The maximum speed is 64 kbps.

3. Frame Relay: The E1 circuit is used, and the speed can be 64 K to 2 Mbps.

4. V24: the router end is a DB50 connector, and the external network end is a 25-pin connector.

In asynchronous mode, the link layer protocol PPP is encapsulated and Network Layer Protocol IP address and IPX are supported. The maximum transmission rate is 115200bps;

In synchronous mode, link layer protocols such as X.25, frame relay, PPP, HDLC, SLIP, and LAPB can be encapsulated. IP and IPX are supported, and the highest transmission rate is 64000bps.

Transmission Distance: it is related to the transmission rate, such as 2400bps-60m; 4800bps-60m; 9600bps-30m; 19200bps-30m; 38400bps-20m; 64000bps-20m; 115200bps-10m.

5. V35: the router end is a DB50 connector, and the external network end is a 34-pin connector.

V35 cables are generally used only for synchronous data transmission. They can encapsulate link layer protocols such as X.25, frame relay, PPP, SLIP, and LAPB on interfaces, and Support Network Layer Protocol IP addresses and IPX.

V.35 cable transmission (in synchronous mode) is recognized as the highest rate of 2048000bps (2 Mbps ).

Transmission Distance: it is related to the transmission rate, such as 2400bps-1250m; 4800bps-625m; 9600bps-312m; 19200bps-156m; 38400bps-78m; 56000bps-60m; 64000bps-50m; 2048000b.

6. below are several common but important control signals in V.24 and V.35 procedures:

DTR (Data terminal ready, Data terminal ready)

DSR (Data Set Ready Data preparation)

It is mainly used to transmit negotiation information between devices.

DCD (Data Carrier Detect Data Carrier detection)

Used by devices to detect the current link status.

RTS (request to send)

CTS (clear to send clear send)

7. BRI: connector with a RJ-45 crystal head. The bandwidth customized for interface procedures is 2B + D, with a total bandwidth of 128 Kbps.

8. CE1: the available time slot range is 1 ~ 31. Time slot 0 is used for system synchronization and cannot be used for data transmission. Each logical interface features the same as the synchronous serial port. It supports link layer protocols such as PPP, frame relay, LAPB, and X.25, and network layer protocols such as IP and IPX.

The CE1/PRI router interface is a DB-15 (matrix) connector, in the network side is a BNC head or RJ-45 crystal head connector.

Currently, a conversion adapter from a 75 Euro copper axis cable to a 120 euro shielded twisted pair cable is generally used to connect the CE1/PRI cable using a RJ-45 connector.

9. PRI: 30 out of 32 time slots can be used, and the other 0 time slots are used for system synchronization. 15 time slots are used for D-Channel Transmission signaling and cannot be used at will.

The PRI interface provides a total bandwidth of 30B + D, totaling 2048 Kbps.

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