39
Chapter 9: Regulatory Information
Your ISDN TA/V has been approved by BABT (the British Board of
Telecommunications) for connection to British Telecom’s ISDN service
under the approval number of NS/3940/5/P/604019.
WARNING
Interconnection directly, or by way of other apparatus of ports marked
“SAFETY WARNING: see instructions for use”, with ports marked or not
so marked may produce hazardous conditions on the network, and
advice must be obtained from a competent engineer before such a
connection is made.
Interconnection directly, or by way of other apparatus, of ports complying
with SELV requirements may produce hazardous conditions on the telephone
network. Advice should be sought from a competent engineer before such a
connection is made.
The safety status of the interconnection ports on the back panel of the unit
are as follows: Ports identified by
LINE
and the handset symbol
= TNV
; Ports
identified by
DTE
symbol and
CONTROL = SELV
.
TNV —
Is a circuit which under normal operating conditions carries
telecommunications signals.
SELV —
Is a secondary circuit which is so designed and protected so that
under normal and single-fault conditions, the voltage between any two
accessible parts does not exceed a safe value (42.2V peak or 60 VDC).
Only connect apparatus complying with the relevant interface requirements
to the ports on the back panel of the unit.
A single mains cable, 2 metres in length, is supplied with the unit. This should
be connected to a suitable mains supply. The mains plug is the primary
disconnect device for the unit and you must ensure that the unit is installed
near a socket outlet and that the outlet is easily accessible.
9. Regulatory Information
