Missed Call Notification
The service allows you finding out who has called you, when the telephone line was busy, switched off or was outside the zone of coverage. By doing so, it ensures that an important call will not be missed.
HandyTone 502 (HT-502) from Grandstream is an analog 2xFXS, 2xETH VoIP Gateway (SIP ATA adapter) with the integrated router.
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