As legacy 3G and 2G mobile services in many countries are now being switched off, Sonifex’s new DHY-04V VoLTE Hybrid allows HD Voice quality calling over 4G on a cellular (mobile) phone network.
The DHY-04V can accept a SIM card in the rear panel slot and, by connecting a suitable GSM antenna, it can receive and make high-quality broadcast calls over the cellular network, converting the 4G call to the 4-wire audio signal to and from a connected mixing console. The module used in the DHY-04V can take and make calls on any 4G GSM network, and can fallback to 3G and 2G if required.
Intended for studios in remote locations, for OB vans and trucks on the move, and in emergency situations where a telephone landline can’t be guaranteed. It combines all features of the company’s DHY-04, together with additional front panel indicators – there are LEDs for SIM enabled and for GSM Network availability. Additionally, a pushbutton allows the mobile signal level to be displayed on the meter LEDs.
Normally the hybrid will be used in a fixed location (OB trucks are normally stationary), so the antenna can be set for best signal quality. However, the far end may be from a cellular phone, so may vary in quality and which can lead to dynamic bandwidth changes during a call. It is mostly true that network providers will only handle HD Voice on 4G and 3G networks though, in theory, it should also be compatible with enhanced 2G networks.
The method has to be supported by the network (and this may be limited by contract), and when different networks are involved in the call, the interoperability between the networks.
The actual equipment used by both ends of the call must be HD Voice compatible. Both these requirements will be established on call connection, which leads to the third criteria.
Key features:
- Multi band support for 4G, 3G and 2G.
- Rear panel 4G, 3G or 2G GSM SIM card insertion.
- Ethernet web server control and configuration.
- Front panel speed-dial buttons with redial.
- Signal strength LED display.
- LEDs for SIM enabled and GSM network availability.
- Automatic operation.
- Combined AES/EBU and analogue input and output.
