RSX-1010: The first professional audio device, fully customized and designed for NTT’s high-speed phone and data network ("HIKARI DENWA").
As one of the best IP-based communication networks in the world HIKARI DENWA provides high bandwidths with guaranteed speed, low latencies, reliable transmissions and is available everywhere in the country for an affordable price.
HIGH-RESOLUTION AUDIO. EVERYWHERE.
AUDIO-OVER-IP WITH 5 MBP/S. GUARANTEED.
With "HIKARI DENWA" the market-leading japanese telecom provider NTT provides a nationwide "fiber-to-the-home" network, based completely on IP packet communication. NTT claims 90% of the populated area in Japan is covered. Every connected household or business office can access NTT´s communication services with flexible bandwidths - depending on the needs and the chosen contract.
The unique advantage of NTT´s service - compared to usual internet data connections - is the guaranteed bandwidth of 5 Mbps on a basic HIKARI DENWA contract. Everywhere, at any time!
HIKARI DENWA media streams get the highest priority in NTT´s domestic network. All other traffic, especially internet traffic, performs with a lower priority. This way highly reliable audio transmissions with the RSX-1010 are ensured.
The guaranteed basic bandwidth of 5 Mbps can be even increased, by chosing a NTT pro-business contract with additional fiber channels. This way the RSX-1010 enables high resolution multi-channel transmissions everywhere within NTT´s nationwide available network. The next level of professional network transmission is already available!
Example Bi-directional high-resolution connection with 96 kHz/24 Bit between Tokyo and Osaka.
The RSX-1010 creates packets of audio data and transmits them as media streams to the receiving unit. The receiver unit re-creates the original audio-channels from the packet stream. With a single HIKARI DENWA fiber connection up to 6 channels with 44.1 khz/16 Bit or 2 channels with 96 kHz/24 Bit audio can be transmitted (see transmission examples below).
The additional Intercom I/O can be used simultaneously besides the main multi-channel, high-quality audio transmission. Besides the professional audio and INTERCOM connections, GPIO and RS232C data for external equipment, alarm and connection control can be transmitted.
THE MOST POWERFUL REPLACEMENT FOR ISDN.
Compared to ISDN, a pair of RSX-1010 using NTT´s HIKARI DENWA provides a better sound quality, supports a higher number of audio channels and results in overall lower operation costs. Finally, it will still work, when all ISDN devices have retired.
With the migration to the “All-IP” fiber optical networks ISDN connections will be replaced until 2020. NTT and other telecom providers will exclusively using Voice-over-IP (VoIP). Broadcast companies and radio stations are still relying on established ISDN connections and hardware, but need to migrate to IP-based solutions in the near future.
Thanks to the combination of the HIKARI DENWA support and NTT’s high-performance fiber network with a guaranteed data bandwidth the RSX-1010 is a extremely powerful, future-proof solution for the replacement of aging ISDN solutions.
NETWORK ROUTING? EASY AS A PHONE CALL.
DIAL THE NUMBER. SIMPLY.
The connection to another RSX-1010 in NTT´s HIKARI DENWA network is established like a phone call, by dialing it´s number.
No network routing, no entering of multi-digit IP numbers is required. Connections can be saved in the integrated contact list ("address book").
Select a number from the internal address list.
Press Call. Transmit!
HIKARI DENWA COSTS
The use of the modern fiber optical network infrastructure of national Telecom providers for professional broadcast links and audio distribution, is a breakthrough in cost control and price efficiency.
Compared to traditional ISDN services, HIKARI DENWA is a very price-efficient alternative. Overall audio transmission costs are significantly lower - by achieving professional broadcast audio quality and reliability at the same time. For the current details of a monthly contract and individual costs of a transmission, please have look on NTT´s billing charges.
HOW MANY AUDIO CHANNELS CAN BE TRANSMITTED?
EXAMPLES FOR RSX-1010 WITH ONE HIKARI DENWA CONNECTION *
THE RSX-1010 provides two different audio formats (IP codecs) for HIKARI DENWA communication:
LP MODE (RFC 3190)
Equivalent to FM radio quality (Reduced Freq. Response: ~ 16 kHz).
SP MODE (LINEAR PCM)
16 or 24 Bit with sample rates of up to 96 kHz are possible.
LP mode (Equivalent to RFC 3190)
= FM Radio sound quality
0.526 MBit/s 1 Ch.
0.910 MBit/s 2 Ch.
1.679 MBit/s 4 Ch.
2.524 MBit/s 6 Ch.
3.341 MBit/s 8 Ch.
4.261 MBit/s 10 Ch.
SP mode (PCM 44.1 kHz / 16 Bit)
= CD sound quality
0.741 MBit/s 1 Ch.
1.482 MBit/s 2 Ch.
2.975 MBit/s 4 Ch.
4.457 MBit/s 6 Ch.
SHOW MORE BANDWIDTH EXAMPLES
SP mode (PCM 48 kHz / 16 Bit)
0.910 MBit/s 1 Ch.
1.679 MBit/s 2 Ch.
3.341 MBit/s 4 Ch.
SP mode (PCM 88.2 kHz / 16 Bit)
1.486 MBit/s 1 Ch.
2.972 MBit/s 2 Ch.
SP mode (PCM 96 kHz / 16 Bit)
1.679 MBit/s 1 Ch.
3.341 MBit/s 2 Ch.
SP mode (PCM 48 kHz / 24 Bit)
1.294 MBit/s 1 Ch.
2.524 MBit/s 2 Ch.
4.984 MBit/s 4 Ch.
SP mode (PCM 88.2 kHz / 24 Bit)
2.237 MBit/s 1 Ch.
4.474 MBit/s 2 Ch.
SP mode (PCM 96 kHz / 24 Bit)
2.524 MBit/s 1 Ch.
4.984 MBit/s 2 Ch.
* All examples are valid for one used HIKARI DENWA connection channel with it´s maximum bandwidth of 5 MBit/s (see technical explanation below).
The use of multiple HIKARI DENWA channels is possible and increases the number of transmitted audio channels.
All examples are working with bi-directonal communication.
HIKARI DENWA Live Presentation at
InterBEE 2016 Tokyo
RESONETZ CEO Masahiko Tange demonstrates a high-resolution Hikari Denwa Connection from Tokyo to Kyoto and back. (In Japanese)
OPEN WITH YOUTUBE
"HIKARI DENWA" TECHNOLOGY.
ONE CHANNEL. 5 STREAMS. UP TO 5 MBP/s
A standard "HIKARI DENWA" contract is based on a so-called "channel" which combines phone, video and data connections in a group of optical fibers. Additional channels for higher bandwidths and extended phone services can be used, e. g. with NTT´s pro-business contracts.
One "HIKARI DENWA" channel (see picture above) is divided into one phone line for voice communication and one video line (e.g. for video conferencing). The channel includes also a high-priority line for data communication (no internet connection). The RSX-1010 is using the complete channel for it´s audio transmission.
A HIKARI DENWA channel transmits media data with up to 1 Mbps in a single stream. Up to 5 streams can be used and result in 5 Mbps maximum bandwidth per HIKARI DENWA channel.
Depending on the number of transmitted audio channels and the quality settings (up to 24 Bit/96 kHz), the RSX-1010 automatically increases the number of media streams accordingly to the settings (up to 5 streams = 5 Mbps). NTT charges the "call" by the number of used streams (= data). A higher number of streams will increase the costs of the "call".
The RSX-1010 is connected to NTT´s terminal via a simple LAN cable - like a usual IP-based phone or data device. The audio connection to the partner on the other end of the line is initialized via the integrated phone book or the number pad on the front of the RSX-1010.
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Public IP networks suffer from the same problem:
They are unpredictable and often less reliable.
NTT´s HIKARI DENWA is the all-available alternative for reliable, low-latency audio communication, which needs to be invented, if it were not already there.
READ ON: RSX-1010 SPECIFICATIONS.