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Chapter 5: Installation
Installing the copper Cat5e Ethernet interface
Page 5-21
Test resistance in the drop cable
Connect the bottom end of the copper Cat5e drop cable to a suitable drop cable tester and test
that the resistances between pins are within the correct limits, as specified in the table below. If
any of the tests fail, examine the drop cable for wiring faults.
Measure the
resistance
between…
Enter
measured
resistance
To pass test,
resistance must
be…
Circle
“Pass” or
“Fail”
Additional tests and
notes
Pins 1 and 2
Ohms
<20 Ohms
(60 Ohms) (*1)
Pass
Fail
Resistances must be
within 10% of each other
(*2). Circle “Pass” or
“Fail”:
Pass
Fail
Pins 3 and 6
Ohms
<20 Ohms
(60 Ohms) (*1)
Pass
Fail
Pins 4 and 5
Ohms
<20 Ohms
(60 Ohms) (*1)
Pass
Fail
Pins 7 and 8
Ohms
<20 Ohms
(60 Ohms) (*1)
Pass
Fail
Pin 1 and screen
(ODU ground)
K Ohms
>100K Ohms
Pass
Fail
These limits apply
regardless of cable
length.
Pin 8 and screen
(ODU ground)
K Ohms
>100K Ohms
Pass
Fail
(*1) A resistance of 20 Ohms is the maximum allowed when the cable is carrying Ethernet.
A resistance of 60 Ohms is the maximum allowed when the cable is carrying only power to the
ODU (when Ethernet is carried by one of the other ODU interfaces).
(*2) Ensure that these resistances are within 10% of each other by multiplying the lowest
resistance by 1.1 – if any of the other resistances are greater than this, the test has failed.
Содержание PTP 670 Series
Страница 1: ...F Cambium PTP 670 Series User Guide System Release 670 02 50 ...
Страница 349: ...Chapter 5 Installation Installing an SFP Ethernet interface Page 5 52 Correct Incorrect ...
Страница 405: ...Chapter 6 Configuration and alignment System menu Page 6 46 Figure 151 LAN Configuration page PTP topology TDM support ...
Страница 406: ...Chapter 6 Configuration and alignment System menu Page 6 47 Figure 152 LAN Configuration page PTP topology SFP support ...
Страница 408: ...Chapter 6 Configuration and alignment System menu Page 6 49 Figure 154 LAN Configuration page HCMP topology ...
Страница 416: ...Chapter 6 Configuration and alignment System menu Page 6 57 Figure 156 QoS Configuration page IP MPLS ...
Страница 445: ...Chapter 6 Configuration and alignment Management menu Page 6 86 Figure 173 Time Configuration page SNTP enabled ...
Страница 551: ...Chapter 7 Operation System statistics Page 7 64 Figure 250 Main Port Counters page when main port is bridging traffic ...