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Private Data/Voice Network

Regional Chinese Electric Company Chooses MAXcess for Voice and Data Transmission over Multipoint Radio Links

As a result of the increase in the number of offices and power plants springing up in Shanxi province west of Beijing, the Yun Chen Power Bureau needed to create an internal network in the region for transmission of control signals, LAN and voice traffic.

Pleased with the performance and reliability of RAD’s Kilomux, used in its previous network for data and voice compression, Yun Chen Power Bureau turned again to
RAD to build the private WAN.

The new network is based on the MAXcess™ product range of integrated bandwidth managers. There are two MAXcess-3000 units at the main office. The 14 remote sites have a combination of five MAXcess-3004 units, one MAXcess-300 unit and eight MAXcess-30 units. Between the main and remote sites, data and voice are broadcast over a Cylink wireless radio link.

Voice Switching Functions
Because there is a PBX, key system or a telephone at each site, the company wanted to use the existing infrastructure and maintain the dialing scheme.

The intention was for employees to be able to dial from one office to another or from one branch to the main office without dialing out to the public switched telephone network. In this case, the voice switching functions provided by MAXcess perform the routing capability of a PBX.

The new network connects remote sites to each other as well as to the main office. Savings are substantial because the customer does not pay for interoffice telephone calls that are routed through the MAXcess units. In addition, calls destined for outside the private WAN go through the MAXcess network and exit at the most economical point.

Sending asynchronous data from the main office to remote regional offices and between the remote offices was an additional network requirement.

MAXcess was chosen because of its modularity as well as its high capacity of available voice and data ports. In addition, it is designed to generate savings on bursty traffic. Due to silence suppression, bandwidth is used only when there is voice activity.

"The quality of RAD’s products and its excellent pre- and post-sales service greatly impressed the customer," said Dong Chun Li, Vice General Manager of Jilong, the local systems integrator.