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VALID TO BE VALID SUPERSEDED TO BE SUPERSEDED ABOLISHED TO BE ABOLISHED

Standard No. Title Price(USD) Delivery Status Add To Cart GB/T 7623-1987 Automatic answering equipment and/or parallel automatic calling equipment on the general switched telephone network,including procedures for disabling of echocontrol devices for both manually and automatically est (USD) via email in 1-3 business day VALID Add To Cart YD/T 1387.4-2008 Testing Methods for Media Gateway——Providing Multimedia Services via email in VALID please email coc@codeofchina.com for quotation

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