Siemens EH.75M.11. Especificaciones descargar pdf (Pagina 277)

T400 Controller Facilities Manual

667/EB/20200/000 Page 25-6 Issue 9

25.2.4 Cover

The PCB is fitted with a cover (part number 667/2/25192/000 front, 667/2/25193/000

rear).

The cover must ALWAYS be fitted before any cables are installed, and should

NEVER be removed whilst the telephone cable (from socket SK1 on the PCB) is

connected to the telephone network.

In the UK, removal of this cover invalidates BABT approval.

If the PCB is for RLM only, it may be sub-equipped. In this case, the telephone socket

and associated electronics are not fitted, and thus, no cover is required.

25.2.5 Configuring the Switches on the Ancillary Processor PCB

Before any connectors are attached to the Ancillary Processor PCB, the configuration

switches need to be set up as described below. Figure 25.1 shows the position of the

switches on the PCB and the directions to set the switches to for different options.

There are 4 switches on the PCB:

S1 - 2/4 Wire Select Switch

S2 - Lithium Battery On/Off Switch

S3 - Line Level Switch

S4 - 600 Ohm/High Impedance Switch

(If the PCB is not being used as an OTU, switches S1, S3 and S4 can be ignored.)

These are set as follows;

1. S1 - 2/4 Wire Select Switch

Set to either 2 or 4 wire as required by the position indicated on the

installation sheet for the Integral OTU.

2. S2 - Lithium Battery On/Off Switch

Set the Lithium Battery Switch (S2) to ON.

3. S3 - Line Level Switch

Ensure that the Line Level switch (S3) is set to the required line levels.

These are stated on the installation information sheet for the Integral OTU.

The table below shows switch settings corresponding to the different

levels. Switch S3 is a 6-way DIL switch. Switch positions 1 to 4 set the

Output Power and switch positions 5 and 6 set the Receive Threshold.

Output Power1234 Receive Threshold 5 6

0 dBm1000 -42 dBm00

-3 dBm1001 -39 dBm01

-6 dBm0100 -33 dBm10

-9 dBm0101

-10 dBm0010

-13 dBm0000

-16 dBm0001

1 2 ... 272 273 274 275 276 277 278 279 280 281 282 ... 307 308

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