现货hp/agilent 4937a三台.欢迎来电咨询! the hp4937a contains a set of voiceband transmission tests -- level/frequency measurement, noise, and 2- and 4-wire return loss measurements. it also has the ability toseize and hold three types of e/m lines. in addition, the hp 4937a simulates signaling both from the central office and from the pbx at the network interface.

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