Plastic jacket joint closure for telecommunication cable Part 2:Heat shrinkable joint closure
Plastic jacket joint closure for telecommunication cable Part 1:General specification
Basic Requirement of Transmission Impaiment Tolerance for Group 3 Document Facsimile on the Telephone Network
Distribution equipment for telecommunication
Both Way hinge Overhead conveyors
Metal button seal
LB--ⅢGeneral specifications
The Technology of Wire-wrapping
The specification for coin box telephone set
Jack and Plug for Indoor Telephone
Semiconductor Rectifier Equipments for Telecommunications
Lead Charaters for Post and Telegraph Date-stamp
Specifications for date stamps of post and telecommunication
Post and Telegraph date stamp
Pillar Box
Pillar box
Technical Requirements and Test Methods for Ringing Power Sources Alarm and Distribution Frame in Manual Toll Telephone Switching Equipments
Technical Requirements and Test Methods for Relay in Manual Toll Telephone Switching Equipments
Technical Requirement and Test Method for Exchanger of Operating Service in Manual Toll Telephone Switching Equipments
Technical Requirement and Test Method for Monitors Desk in Manual Toll Telephone Switching Equipments
Technical requirements and test methods for toll service boards (Toll recording boards enquiry desks) In manual toll telephone swiching eqiupments
Technical requirements and test methods for toll connecting boards And special boards in manual toll telephone switching equipments
General Technical Requirements and Test Methods for Manual Toll Telephone Switching Equipments
Private Letter Box for Multistorey and High-rise Block of Flets