This guide assists test laboratories in implementing the correct tests for ITU-T K.20, K.21 , and K.45 compliance testing. It is based on K.44 (2012-05). In force Superseded and Withdrawn components : Number: Title: Status: K.21 (11/88) Resistibility of subscribers’ terminals to overvoltages and overcurrents Superseded : K.21 (10/96), 7/8/2015 · The present document is composed of 3 parts: General remarks, definitions General test plan Test plan according to the family of equipment. 2 Scope This recommendation applies to all equipment covered by the scopes of Recommendations ITU-T K.20, K.21 and K.45 recommendations. 3 Normative references The following referenced documents are …
This will determine a number of factors required for ITU-T K.21 testing including test circuit and waveform, basic test level, enhanced test level, number of tests, and others. ITU-T K.21 also includes an electrostatic discharge or ESD component to testing.
This will determine a number of factors required for ITU-T K.21 testing including test circuit and waveform, basic test level, enhanced test level, number of tests, and others. ITU-T K.21 also includes an electrostatic discharge or ESD component to testing.
2 ITU-T Rec. K.21 (07/2003) internal cable ports are given in Table 7. For information on the headings and terms used in the tables refer to clause 10/K.44. Refer to 5.2/K.44 on selecting the enhanced resistibility requirement.
enhanced . Guidelines for determining under which level the equipment under test (EUT) falls can be found in ITU-T K.11, but note that the ?nal authority rests with the test administrator. ITU-T K.44 describes the test conditions used in K.20 and K.21 . ITU-T de?nes the following acceptance criteria:, Lightning / Transients: Protection to ITU-T k.21 enhanced levels Programming: Auto-dial numbers are pre-programmed via an integral keypad All the features of the standard analogue unit plus: Remote programming: Auto-dial numbers, time-out and dial mode can be programmed over the phone line either from a tone phone or from monitoring software (TMA).
Based on thyristor overvoltage protection technology, TISP4310T3BJR-S provides robust surge protection for modems. It is designed to pass European ITU-T K.21 tests which call for 600 Vrms, 600 W, 1 A test for 1 sec increased from 0.2 sec duration for basic requirement which introduces significant increased heating.
Based on thyristor overvoltage protection technology, TISP4310T3BJR-S provides robust surge protection for modems. It is designed to pass European ITU-T K.21 tests which call for 600 Vrms, 600 W, 1 A test for 1 sec increased from 0.2 sec duration for basic requirement which introduces significant increased heating.
