Kä ye kek looi aye E1 switcher ye kek looi në kaam de kaam de kaam de kaam de kaam de kaam de kaam de kaam de kaam de kaam de kaam de kaam de kaam de kaam de kaam de kaam de kaam de kaam de kaam de kaam de kaam. 2-way independent E1 reversal protection function, in the default working mode, when the main E1 line fails, the device will automatically switch to the backup E1 line to transfer without damage. 2-way independent E1 reversal protection function, in the default working mode, when the main E1 line fails, the device will automatically switch to the backup E1 line to transfer without damage. 2-way independent E1 reversal protection function, in the default working mode, when Na cï E1 line ye looi, ka tɛ̈n yenë yen looi, ka tɛ̈n yenë yen looi, ka tɛ̈n yenë yen looi, ka tɛ̈n yenë yen looi, ka tɛ̈n yenë yen looi, ka tɛ̈n yenë yen looi. A tʊmɩyɛ kɛ telephone conference, video conference, video surveillance systems.