Thisproductismainlyforcustomerstailor-madetwotelephonelines,atelephonetwotelephonelines 1,2phonelineswillneedtwophones,accountingforthedesktoptoo. 2,whenaphonecallwhenthecallerhowtodoanotherone? 3,thecompanychosentoinstallasavingontheirbillsdiscountlines,telecommunicationlines,buttheoriginalstillneedtoanswerthephone,howdo? Andsoaseriesofissues,butonlyneedtoinstallthisselectoriscompletelyobviatesmanyofyourtrouble. Onedoesnotneedtoinstallpowersupplyandconvenient. 2,donotsetup,plugandplay. 3,##forcedtoswitchlines. Callusediscountlines,youcanalsochoosetousetheprevioustelephonelines---flexible;twolinestobellmayreceive,andtherearethefirstprioritycallfeature. Theselectortoconnecttwotelephonelines(forexample,atelecommunications,andtheotherone,suchasEone,Netcom,ChinaMobilepublictelephoneandotherequipment), Whenonthephone,youcanchooseadefaultlinecall,whenthereisanecessaryprerequisiteforbeingabletochooseanotherrouteacall,convenientandfast.Whenalineinthedial,anothertodoalineselectorinthesimulatedoff-hook,thenfearintoothers. Twolinescanbeansweredandgiveprioritytothefirstcaller,suchasalinecall,anotheronecircuitautomaticanalog-hook.Hookstate,ifitisalsoalinecall,selectthedevicewillautomaticallyjumpwillbeanadditionalphonelinetelephoneconnection,theconvenienceofyouranswer.Italsomadethetelecommunicationslineanalog-hook.