Multitech MT2834BLR Uživatelská příručka stáhnout pdf (Strana 72)

Chapter 7 - BABT Requirements

7.1.1 European Low Voltage Directive

When correctly installed and maintained, the modem will present no

hazard to the user. When correctly installed the modem will be connected

to the PSTN or a PW and to a Data Terminal Equipment (DTE), whose

modem connections comply with CCITT recommendation V28. The DTE

connections are therefore taken to be safe voltages (less than ± 30 volts).

The main power source shall be installed near to the equipment and shall

be easily accessible. The plug that connect to the apparatus to the main

power supply must be fitted with a 5A fuse that complies with BSI1362.

Ports which are capable of connecting to other apparatus are defined as

SELV. To ensure conformity with EN 41003, ensure that these ports are

only connected to ports of the same type on other apparatus.

7.1.2 Compliance with BS6305 Clause 6.2, BS6320

Clause 7.2, and BABT/SITS/82/005S/D

a. The modem is suitable for connection to the Public Switched Telephone

Network (PSTN) provided by British Telecommunications plc or

Kingston Communications (Hull) plc. Circuit supply by British

Communications, Mercury Communication, or Hull City Council. Only

direct exchange lines may be used, not shared service.

b. The modem is suitable for household, office, and similar general indoor

use. It is not suitable for use as an extension to a payphone.

c. BT lines supplied must support either loop disconnect or multifrequency

tone signalling.

d. REN (Ringer Equivalence Number).

The REN value of a unit is calculated from 3/n where n is the total number

of units which can be connected in parallel which will still cause the

standard bell (as defined in BS6305 Appendix D) to ring.

REN values of less than 0.3 cannot be assigned.

REN = 1

1 2 ... 67 68 69 70 71 72 73 74 75 76 77 ... 89 90

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Multitech MT2834BLR Uživatelská příručka Strana 72