Let’s look at Grandstream ATA HandyTone-502 Analog Telephone Adapter the latest product in the HandyTone ATA series and Grandstream VoIP product line.
Offer direct white route to Viet Nam termination with competitive rate
and high quality. 100% full CLI and Non CLI; ASR: 65%;
ACD: 13 minutes; PPD: 30s and Capicity 5000 calls.