PSU makes high-frequency noise, unbearable

PSU makes high-frequency noise, unbearable

GRANDSTREAM HandyTone HT701 1xFXS / T.38 Fax SIP-A (Office supplies & stationery)
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Customer Review

Device not particularly easy, everything has to be changed from American to German standards. Manual configuration and only in English. Even in the Internet not particularly insightful UnterstÃ'tzung discoverable. GerÃ't makes stÃ'ndig frequency GerÃ'usche, fÃ'r operation unreasonable in ArbeitsplatznÃ'he.
Positives: So far zuverlÃ'ssiger and störungsfreier operation, good GesprÃ'chsqualitÃ't. Price reasonable

Addendum: I have today (16:11:14) tries to take the adapter to a DUS.net T.38 fax connection in operation. Outgoing faxes went out without any problems, for incoming calls, the fax accessory (ELSA MicroLink Office) does not ring. It could depend on the ringing frequency which betrÃ'gt in America 20 Hz and 25 Hz with us. Unfortunately, I have not found any Einstellmöglichkeit in KonfigurationsoberflÃ'che

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