Now is such, a embedded in the wall cable, communications lines, used as a printer using normal use 3.5.6 three wire, wire gauge test is normal, the distance at around 30 meters, now installed on both ends TP5 correlates opening switch, switch port light is not bright, both ends cannot be communications equipment, test switch is now normal, normal, begged god help eliminate the problem, thank you!

CodePudding user response:

In addition, in the network equipment now has a fixed IP, no routers in the network,

CodePudding user response:

Using 3.5.6 three lines to normal use? What do you mean?
Port or wouldn't light crystal head wrong against, or line break,

CodePudding user response:

Line meter test is normal, now with equipment of the cable only 3, with 568 b standard 3/5/6 three wires to transmit signal

CodePudding user response:

568 b, 1236, isn't it? How is 356? On both ends of the cable what of? Is answered the switches? Or printer?

CodePudding user response:

I informed the cable with 356 can communication? We are all made of 568 b standard

CodePudding user response:

Must not, whether standard a or b, MB network must be four, want to gigabit all-pass eight root

CodePudding user response:

MB switch port light is not bright, typical physical link layer fault, I do net work for many years, haven't seen correlates 3 and 6 can realize communications, MB using 5 (4,5,7,8 reserved for phone, of course, also can use the 4 correlates,5,7,8 continue as a net), use all QianZhaoBa core,
MB:
1 output data (+)
2 the output data (-)
3 the input data (+)
4 keep for phone use
5 reserved for phone use
6 the input data (-)
7 reserved for phone use
8 reserved for phone use

CodePudding user response:

Find an operational company, or find a operational network, found that many of the problems is very simple, because to ask people do not even know basic network,

CodePudding user response:

Network communication using 5 quad, one can use less, you sure there's no way with 3 and 6 switches

CodePudding user response:

568 b communication also want 4 core, the least 5, long distance transport must be in accordance with the standard pressure, not according to the standard, by pressure welding, wire gauge will be bright, but shall be the crosstalk line itself is too big, can't communicate

CodePudding user response:

Everyone a great god, first of all thanks for your answer, busy making mistakes and no account details, waste your precious time, very sorry! This is a dining room of a single system, cable connection at both ends is the order of the COM and thermal printers LPT port, use the converter to convert crystal head into COM and LPT port, by measuring, converter only three lines in actual use, this is the specific situation, once again thank you for the great spirit of the busy schedule of solutions, then replace the cable ruled out the faults in the walls,