I used to use Stack WS-C3650-48PD-L. I used to ring. Even I have been using HP J9623A (https://www.allhdd.com/hp-j9623a-rack-mountable-switch/ )server for many years and It also rings.
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I used to use Stack WS-c3640-48PD-L. It used to ring even My new Switch HP J9623A (https://www.allhdd.com/hp-j9623a-rack-mountable-switch/ ) also ring
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