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Service Categories
Service Categories
Overview
Table E–1 describes the services specifications for the 54-21147
module.
Table E–1 BABT-Approved Service Specifications for the 54-21147 Module for UK
Compliance
Service
Category
Interface Type
(CCITT recom-
mendation)
Service Requirements
Data Rate
Public
Telecommunications
Operators
1
(Electrical) (Physical)
BT
Hull
MCL
1
X.21bis
V.24
/V.28
ISO 2110,
BS.6623:
part1, 1985.
2400 bps
4800 bps
9600 bps
19200 bps
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Approved extension cables
2
:
BC22F-25 (25 feet) and BC22F-10 (10 feet)
1
BT — British Telecommunications plc.
Hull — Kingston Communications (Hull) plc.
MCL — Mercury Communications Limited.
2
The total length of cable used must not exceed 27 feet.
E–2 Special Information for PTT Network Users
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