Электротехника \ Сетевое взаимодействие

Engineering Labels for Cables. Introduction to Labels. Information Carried on Labels. Affixing Labels to the Signal Cable, страница 6

n  In the power distribution cabinet (or the first power cabinet of a row in the transmission equipment room), every terminal on the –48 V busbar has a numeric identification. For example, in the above label of “A01/B08—48V2”, “08” (or sometimes “8”) is the numeric identification of the terminal.

n  PGND and BGND are two copper bars, on which the wiring terminals are shorted, so which terminal is connected makes no difference. Therefore, it is only necessary to give the row and column numbers of the power distribution cabinet, not the specific serial number of the terminal on the copper bar. For example, if the label on the loaded cabinet side bears “A01-BGND”, it indicates a BGND cable that connects BGND copper bar in the power distribution cabinet at Row A, Column 01 in the equipment room. Information on the labels for PGND cables should be given in the similar way.

D.5.2  Engineering Labels for External Alarm Cables

The external alarm cables are connected with the first subscriber cabinet of each row (used for power distribution). Labels pasted on the first cabinet of each row should indicate which equipment is using the access terminal. Labels are not needed on the equipment side unless there is special requirement. In this case, only Area 2 of the label should be filled in.

Table D-3 shows the information on the labels for external alarm cables.

Table D-3 Information on labels affixed to the external alarm cables

Content

Meaning

Example

MN

MN: Cabinet number

M: The cabinets going from front to back (in a row) in the equipment room are numbered from A to Z.

N: The cabinets going from left to right (in a column) are numbered from 01 to 99.

For example, A01 is the cabinet in Row A and Column 01.

& Note:

Generally, NM is enough to identify the position of a specific cabinet. If cabinets are installed in a back-to-back manner, and the facing direction of the cabinet must be specified, the cabinets are numbered with MNO. “O” means the direction of the cabinet, and it can be “A” or “B”. On the cable labels described below, this numbering method is used, unless otherwise stated.

The label for the alarm cable carries a little information, and only part of the text area needs to be filled in. It is recommended that the whole length of the label be kept, instead of cutting out the blank area.

Figure D-10 shows a label on the alarm cable. “A01” indicates that the alarm cable is connected from the first cabinet to the cabinet at Row A, Column 01 in the equipment room.

Figure D-10 Example of a label for alarm cables

D.5.3  Engineering Labels for Ethernet Cables

1.  Scope of Application

These labels are applied to the cables that connect network interfaces on the boards in the subrack.

2.  Meaning of the Label

Table D-4 shows the information on both sides of the labels affixed to the cables that connect network interfaces on the boards in the subrack.

Table D-4 Information on labels affixed to the Ethernet cables

Content

Meaning

Example

MN-B-C-D

MN: Cabinet number

For example, A01

B: Subrack No.

Numbered from the bottom up with two digits, for example, 01

C: Physical slot number

Numbered from the top down and from the left to right with two digits, for example, 01

D: Network interface number

Numbered from the top down and from the left to right with two digits, For example, A01

MN-Z

MN: Cabinet number

For example, B02

Z: Location number

Valid location number of the terminal device onsite. If the cable is connected to a router in a cabinet, the numbers of the cabinet, the subrack and the network interface of the router should be specified, for example, B02-03-12. If the cable is connected to the Network Management Station (NMS), specific location of the NMS should be given.
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