Appendix C - Cabling Considerations
RJ-45 Cable
380
Mediatrix 4104
The RJ-45 cable uses two pairs of wires: one pair for transmission and the second pair for reception. It is wired
so that pins 1 & 2 are on one twisted pair and pins 3 & 6 are on a second pair according to common wiring
standards which meet the EIA/TIA T568A and T568B requirements.
Figure 92:
Straight Through Connectivity
Pin Name And Function
The following is the meaning of each pin in a RJ-45 cable.
Crossover Cable
A RJ-45 crossover cable is used when only two systems are to be connected to each other, peer to peer, at
the Ethernet Cards by “crossing over” (reversing) their respective pin contacts. An example would be
connecting two computers together to create a network. The crossover eliminates the need for a hub when
connecting two computers. A crossover cable may also be required when connecting a hub to a hub, or a
transceiver to transceiver or repeater to repeater. When connecting a hub to a transceiver, a straight through
cable is always used.
A crossover cable is sometimes called a null modem. The coloured wires at either end are put into different
pin numbers, or crossed over.
Figure 93:
Crossover Connectivity
Table 240:
Pin Name and Function
Pin #
Name
Function
1
Transmit Data Plus
The positive signal for the TD differential pair. This signal contains the serial
output data stream transmitted onto the network.
2
Transmit Data Minus
The negative signal for the TD differential pair. This contains the same
output as pin 1.
3
Receive Data Plus
The positive signal for the RD differential pair. This signal contains the serial
input data stream received from the network.
4
not connected
5
not connected
6
Receive data minus
The negative signal for the RD differential pair. This signal contains the
same input as pin 3.
7
not connected
8
not connected
Pin 1
Pin 2
Pin 3
Pin 6
Pin 1
Pin 2
Pin 3
Pin 6
Note:
This is not an IEEE supported configuration and should be used for test purposes only.
1- TX+
2- TX-
3- RC+
6- RC-
TX+ -1
TX- -2
RC+ -3
RC- -6
Summary of Contents for Mediatrix 4104
Page 23: ...Installation and Web Page Configuration ...
Page 24: ...Page Left Intentionally Blank ...
Page 136: ...Chapter 5 Web Interface Telephony Miscellaneous 114 Mediatrix 4104 ...
Page 144: ...Chapter 6 Web Interface Advanced STUN Configuration 122 Mediatrix 4104 ...
Page 145: ...SNMP Configuration ...
Page 146: ...Page Left Intentionally Blank ...
Page 184: ...Chapter 8 IP Address and Network Configuration Ethernet Connection Speed 162 Mediatrix 4104 ...
Page 196: ...Chapter 10 DNS SRV Configuration DNS SRV Oriented Settings 174 Mediatrix 4104 ...
Page 226: ...Chapter 12 Configuration File Download Configuration File Example 204 Mediatrix 4104 ...
Page 242: ...Chapter 13 Software Download Emergency Software Procedure 220 Mediatrix 4104 ...
Page 268: ...Chapter 15 Voice Transmissions User Gain 246 Mediatrix 4104 ...
Page 278: ...Chapter 17 Bypass Configuration Bypass Connector Settings 256 Mediatrix 4104 ...
Page 322: ...Chapter 21 Digit Maps Digit Map Examples 300 Mediatrix 4104 ...
Page 350: ...Chapter 24 Telephony Attributes Call Rejection 328 Mediatrix 4104 ...
Page 362: ...Chapter 27 Quality of Service QoS VLAN 340 Mediatrix 4104 ...
Page 366: ...Chapter 28 Syslog Daemon Syslog Daemon Configuration 344 Mediatrix 4104 ...
Page 370: ...Chapter 29 Statistics RTP Statistics 348 Mediatrix 4104 ...
Page 385: ...Appendices ...
Page 386: ...Page Left Intentionally Blank ...
Page 400: ...Appendix B Standard Hardware Information Warranty 378 Mediatrix 4104 ...
Page 404: ...Appendix C Cabling Considerations RJ 11 Telephone Cable 382 Mediatrix 4104 ...
Page 446: ...Appendix E Glossary Wide Area Network WAN 424 Mediatrix 4104 ...