YD/T 638.13-1993
Type designation for accessory equipments of telephone exchange (English Version)

Standard No.

YD/T 638.13-1993

Language

Chinese, Available in English version

Release Date

1993

Published By

Professional Standard - Post and Telecommunication

Latest

YD/T 638.13-1993

Scope

This standard specifies methods for specifying models of accessory equipment for telephone exchanges. This standard applies to the model naming of telephone switching accessory equipment.

YD/T 638.13-1993 history

• 1993 YD/T 638.13-1993 Type designation for accessory equipments of telephone exchange