rj45 with transformer difference between rj45 and rj48

RJ45 interface: for Ethernet (Ethernet 10/100/1000M UTP/STP interface), commonly used in Category 5 unshielded twisted-pair cable, that is, we usually say that the network cable, with a crystal head of that kind.RJ45 is also used for other interfaces, such as ISDN, pin definition is different.

RJ48 interface: used to connect T1, E1 serial lines, usually using shielded twisted pair; RJ-48 can also support PIN3, PIN6 to do the ground connection.RJ45 and RJ48 line sequence is the same, are from left to right for 87654321, but the signal definition is different: RJ45: 10/100M with 1/2/3/6 pins. 1000M with all 8 pins.RJ48: generally common for RJ-48C and RJ-48S, with 1/2/4/5 pins.CT1/PRI-CCI: generally common for RJ-48C and RJ-48S, with 1/2/4/5 pins. 1000M with all 8 pins. RJ48: generally common for the RJ-48C and RJ-48S, with 1/2/4/5 pins. CT1/PRI-CSU (RJ-48C) signal definition is as follows, RJ-48C Pin Description1 Receive Ring2 Receive Tip4 Ring5 Tip for T1/E1 Trunk and Digital Voice Port. E1 Trunk and Digital Voice Port (RJ-48) Pin1 Signal1 RX + (input)2 RX - (input)3 -4 TX + (output)5 TX - (output)6 -7 -8 -Reference: rj45 with transformer E1 (2M transmission link) is a last-mile transmission technology like shdsl/hdsl/sdsl. Digital Data Network (DDN) is a data transmission network that utilizes digital channels to transmit data signals and is essentially a circuit-switched network.FR is a packet-switched network technology. Virtual circuits can be divided. DDN, FR, and ATM can all be viewed as backbone network technologies. the DDN node machines, FR switches, and ATM access switches are the devices at the very edge of their respective networks. From these devices to the subscriber are likely to use last-mile transmission technologies such as E1, SHDSL, HDSL, and SDSL. Since FR, ATM itself supports PVC, accordingly when doing point-to-multipoint access, there is no need to use channelized E1. For e1, it is usually fiber to the subscriber, and the bnc interface comes out from the optical terminal. It can be converted to RJ48 interface. A higher rate of 2 Mbps is a time-division line. Also known as channelized E1. on the router connection method there are two: 1, with BNC-E1 cable (here the E1 end including: RJ48, DB15 and other forms of interfaces) Directly connected to the E1 module 2, if you use the WIC-1T module, then use a G.703 - v.35 protocol converter after the use of V. 35 cable to connect to the WIC1T module. shdsl/hdsl/ sdsl are subscriber data lines that generally use one or two pairs of telephone lines to the subscriber, with interfaces of rj11 or rj48. higher speeds can be achieved at 2M bps or more. While xdsl technology can reach 2M rates, I have not heard of running channelized E1 over a dsl line at this time.

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