75-Ohm RJ45-to-BNC Cable (Dedicated for E1)
Connection
A 75-ohm RJ45-to-BNC cable is connected as follows:
- The RJ45 connector is connected to a router.
- The BNC connectors at the other end are connected to a network device.
Appearance and Structure
A 75-ohm RJ45-to-BNC cable is applicable to the card models listed in Table 7-22.
Cable |
Card/Router Model |
Working Mode |
Network Device Interface Type |
|---|---|---|---|
75-ohm RJ45-to-BNC cable |
|
E1/CE1/PRI |
BNC |
|
E1-F |
BNC |
|
4E1-IMA |
ATM |
BNC |
If the default length is not enough for cable connection, you can use a 75-ohm trunk extension cable as an extension cable.
When using a 75-ohm trunk extension cable to prolong a 75-ohm RJ45-to-BNC cable, connect one BNC connector of the trunk cable to a coaxial connector and the other BNC connector to the remote device, as shown in Figure 7-15.
Pin Assignments
RJ45 |
BNC |
|||
|---|---|---|---|---|
Pin |
Signal |
Label |
Pin |
Signal |
1 |
Rx - |
R |
Core wire |
Rx |
2 |
Rx + |
Insulated wire |
GND |
|
4 |
Tx - |
T |
Core wire |
Tx |
5 |
Tx + |
Insulated wire |
GND |
|
- Tx stands for transmission, and Rx stands for receiving.
- The R and T tags on BNC coaxial cables indicate the signal directions on a router. The R and T BNC coaxial cables must be connected to the Tx and Rx interfaces on the remote device.
Technical Specifications
| Description | Part Number | Model | Cable length | Connector type X1 | Connector type X2 | Connector type X3 |
|---|---|---|---|---|---|---|
| Trunk Cable,3m,75ohm,1*E1,2.2mm,2*BNC75SM-V,(2*SYFYZ75-1.2/0.26PWG1U+120CC2P0.4P430U(S)-I),MP8-II,LSZH,120ohm to 75ohm cable | 04120387 | CAB-1E1-75ohm-3M | 3 m | RJ45 | BNC75SM-V | BNC75SM-V |
| Trunk Cable,50m,75ohm,1*E1,2.2mm,2*BNC75SM-V,(2*SYFYZ75-1.2/0.26PWG1U+120CC2P0.4P430U(S)-I),MP8-II,LSZH,120ohm to 75ohm cable | 04120387-001 | CAB-1E1-75ohm-50M | 50 m | RJ45 | BNC75SM-V | BNC75SM-V |
| Trunk Cable,100m,75ohm,1*E1,2.2mm,2*BNC75SM-V,(2*SYFYZ75-1.2/0.26PWG1U+120CC2P0.4P430U(S)-I),MP8-II,LSZH,120ohm to 75ohm cable | 04120387-002 | CAB-1E1-75ohm-100M | 100 m | RJ45 | BNC75SM-V | BNC75SM-V |
If 75-ohm RJ45-to-BNC cables need to be prolonged, configure two RF coaxial connectors (part number: 14040202) and two 75-ohm trunk extension cables (part number: 04024299) for each 75-ohm RJ45-to-BNC cable.