Caller ID Control
The function allows you choosing a number that you want in order to light up during the call to traditional telephones. You can also unlist the number and it won’t light up.
Let’s look at Grandstream ATA HandyTone-502 Analog Telephone Adapter the latest product in the HandyTone ATA series and Grandstream VoIP product line.
dial one telecom Inc.
Provider of SIP IP telecommunications with DID numbers available globally. Inexpensive long distance calling. Reseller of Grandstream IP telephones.
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