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Universal Signaling Converters

The runaway development of the telecommunications industry has led to a wide array of signaling systems, and yet more are sure to come.

The PROTEI line of signaling converters ensures seamless integration of modern and next- generation      equipment into your network. The well-proven reliability of our solutions makes certain that your installations will deliver    the    dependability and quality that your subscribers demand.

The following options are supported: SS7-R2, SS7-R1.5 (Russian 2CAS), SS7-PRI, PRI-R2, and PRI-R1.5.  On the same platform wide   range   of small and medium capacity trunk gateways can be implemented: SIP-SS7, SIP-PRI,   and   SIP-R2. Solution capacity is up to 16E1.

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A-bis Compression System for BTS Connection via Narrowband Satellite Links

A-bis compressing solution intended to enable mobile communications   over narrowband satellite channels.

The solution consists of several Modules of Concentration (MC) installed on the remote sites and Group Modules of Concentration (GC) installed on the site of network operator.

It  is  proposed to  use the equipment supporting packed data transferring via IP protocol as the   base  station (BTS)  e.g. nabobs     by      paces     Ltd may  be  used. The nabobs communicate with base stations controller via IP channel using the proprietary protocol Abs over IP. Voice stream is transmitted by RTP-protocol using AMR codecs.

For bandwidth reduction before satellite transmission system Modules of Concentrations are installed. MC and   GC performs removing overhead information transmitted over   IP-channel using highly efficient IP-headers’ compression algorithms.  The main purpose of MC/GC is concentration of headers in IP- packets, which usually exceed the useful contents of the IP-packet. For example, for the codec AMR7.4,   useful (voice)   data is 19 bytes. Additional  information transmitted in the  header is consists of headers codec AMR (2 bytes), RTP (12 bytes), UDP (8 bytes), IP (20 bytes), Ethernet (18 bytes) is 40 bytes in summary.

 Average compression ratio for IP headers is more than 3 that means annual compression efficiency is more than 40%.

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