External/Internal Transfer
The external call transfer – is the call transfer to a telephone line other than the company’s telephone line. The internal call transfer – the transfer of an incoming call to another addressee registered on the same telephone line.
HandyTone 502 (HT-502) from Grandstream is an analog 2xFXS, 2xETH VoIP Gateway (SIP ATA adapter) with the integrated router.
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