Allied Telesis OmniConnect/ISDN, Руководство пользователя

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OmniConnect / ISDN
User’s Manual Page 83
Part number 613-10787-00
B.6. Operating conditions for the European Community
The OmniConnect/ISDN series access devices conform to the Low Voltage Directive
73/23/EEC, EMC Directive 89/336/EEC and the TTE Directive 91/263/EEC.
The European Community specifies the requirements for ISDN cabling for use with the
OmniConnect access devices. In countries outside the EC, this specification should be used to
ensure optimal signal quality. ISDN cable specifications are listed below in Table A-2.
Table A-2: ISDN Cable Specifications for the EC
Requirement TX/RX
Capacitance
TX/RX
Impedance
Crosstalk Loss
at 96 KHz
Connector
Resistance Ohmic
Resistance
Value 350 pF > 75 ohms > 60 dB 3 ohms < 0.5 %
Tolerance 0% to –10% N/A N/A +10% to –10% N/A
B.7. Operating conditions for the United Kingdom
The following apply to the OmniConnect/ISDN series access devices when used in the UK:
1. Interconnection directly, or by way of other apparatus, of ports marked U, S/T, and Phone
with ports marked or not so marked may produce hazardous conditions on the network,
and that advice should be obtained from a competent engineer before such a connection is
made.
2. The BRI connector must be hardwired permanently to the S-reference connection point
by using a connect-one-time-only, non-removable plug (RJ-45 with the latch tab
removed).
3. This apparatus must be connected to a main socket outlet with a protective earth contact.
4. Connection of power supply: OmniConnect/ISDN series access devices are intended for
use when supplied with power from a supply providing 220-240 VAC, 50/60 Hz up to
1.25A.