Telepen is linear barcode symbology was developed in 1972, UK. Barcode font efficiently encodes ASCII character along with checksum digit and known by other name Telepen barcode, Telepen Numeric, many more.
Telepen contains the following character set digits (0-9), lowercase letters (a-z), uppercase (A-Z), punctuation marks, non-printable control characters like carriage-return, line feed, etc. Telepen consists of two distinct modes: Alphanumeric mode, and Numeric mode
Structure of Telepen
Basically, four bar space modules are included in narrow bar (bit 1), Wide bar-narrow space for (bit sequence 00), Wide bar-wide space (bit sequence 010), and narrow bar-wide space (bit sequence 01 or 10).Scheme successfully encodes even parity bytes and used for uninterrupted bit stream.
Mainly used in UK, universities for implement in libraries and also in military applications.