KBU64 Rackmount User Manual
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) Kilostreamã 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
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.
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