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KBU64 Rackmount
User Manual
80-10100001-097–2
3. The KBU 64 Rackmount is approved for direct connection to the X.21 and
X.21 bis (V.35) or X.21 bis (V.28) Kilostream provided by British
Telecom PLC or any similar service provided by other British
Telecommunications operators, or a relevant branch system for those
digital circuits which accord to CCITT recommendations X.21 and X.21
bis.
Where connection is made to circuits conforming to CCITT, X21
bis, Service Categories 1 and 2 are supported.
For Service Category 1, data rates of 2.4 kbit/s to 19.2 kbit/s are
available and connection is via an integral cable terminated with a
25 way D-Type connector conforming to BS 6623: Part 1: 1985.
For Service Category 2, data rates of 48k, 56k and 64kbit/s may be
used. Connection is via an integral cable terminated with a 34 pin
connector conforming to BS 6623: Part 1: 1986.
4. If any other apparatus, including cabling or wiring is to be connected
between the apparatus, and the point of connection to the digital circuits
detailed in above, then all that other apparatus shall conform to the
following:
a) The overall transmission characteristics of all that other apparatus
shall be such as to introduce no material effect upon the electrical
conditions presented to one another by the apparatus and the digital
circuit.
b) All the other apparatus shall comprise only:
i) apparatus approved (see note) for the purpose of connection
between the apparatus and the digital circuit, and;
ii) cable or wiring complying with a code of practice for the
installation of apparatus covered by this standard
or such other requirements as may be applicable.
Note: Such apparatus may have been approved subject to
limitations on its use.