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SP Series Style Guide
TTS (Thrift Third Standard)
The maximum field length for TTS format is 104 characters. TTS allows numeric characters and the following
special characters:
: ; < = >
NTT character set
The maximum field length for NTT (Nippon Telephone & Telegraph) format is 69 characters. NTT allows spaces,
numeric characters, upper case alphabetic characters, lower case alphabetic characters, and special characters.
From a PC running a Japanese edition of a supported Windows operating system, NTT also supports 55 Katakana
characters.
The special characters include:
! " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ ] ^ _ ` { | } ~
and the following Japanese-language special characters: (a Japanese edition of a supported Windows operating
system is required.)
The 55 Katakana characters include the following 45 Katakana characters:
and the following 10 Katakana characters:
Each time you start using Japanese-language characters, or stop using them, the driver adds a hidden character.
Each hidden character reduces by one the number of characters you can encode.
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