8. Leased line eliminator for QSIG connections between sites

Aim: To save leased line call costs between sites

In larger companies, the PBXs on multiple sites may be linked together via leased lines and using QSIG signalling in order to make the distributed PBXs function as though they were a single PBX.

When linking PBXs together in this way, point-to-point connections are required between each and every PBX. This becomes expensive in terms of leased lines.

By using the existing company IP network and Vega gateways that support ‘tunnelled’ QSIG, the leased lines are no longer required. The Vega gateways receive the QSIG information on their T1 or E1 interfaces – then, using the destination information in the QSIG header the Vega can select the correct far end Vega gateway to send the ‘tunnelled’ QSIG data to. The far end gateway unpacks the received ‘tunnelled’ QSIG messages and presents them on its T1 or E1 interface.

The PBXs do not know that the QSIG connection was not a leased line.

Telephony Network

•E1 ‘tunnelled’ QSIG signalling is supported by Vega 400 and Vega 100

•T1 ‘tunnelled’ QSIG signalling is supported by Vega 400 and Vega 100

IP Network

•Recommend – private IP network between sites

•Can be any reliable IP connection, including leased line and line of site laser / wireless connection

•Satellite IP connectivity is a possibility, though a system like this should be tested to ensure that QSIG timeouts are not exceeded by the satellite latency.

•QOS should be implemented to ensure that VoIP packets pass through the network in a consistent and timely manner and are not discarded by congested routers

•For inter-site operation the Internet can be used, but contention and available bandwidth must be considered

Version 2.1

16 March 2006

Page 20 of 33

Vega Gateway Scenarios.

©2005-2006 VegaStream Ltd.

 

Examples are given in best faith – ensure that you check the capabilities of systems before

 

 

deploying them, especially the functionality of devices not designed and delivered by VegaStream.

 

VoIPon Solutions www.voipon.co.uk sales@voipon.co.uk Tel: +44 (0) 1245 600560

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Polycom Vega Gateway appendix Leased line eliminator for Qsig connections between sites
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Vega Gateway specifications

Polycom Vega Gateway serves as a crucial component in modern telecommunications, bridging the gap between traditional telephony systems and Voice over IP (VoIP) networks. As organizations transition to digital communication solutions, the Vega Gateway plays a vital role in ensuring compatibility and enhancing connectivity.

One of the primary features of the Polycom Vega Gateway is its ability to facilitate seamless interoperability between different communication protocols. It supports a range of signaling protocols, including SIP (Session Initiation Protocol), H.323, and analog interfaces, making it easy to connect legacy phone systems to modern VoIP setups. This flexibility allows businesses to gradually upgrade their telecommunications infrastructure without the need for costly complete system overhauls.

The Vega Gateway is equipped with advanced transcoding capabilities, which enable the conversion of audio streams between various formats. This is especially beneficial in multi-vendor environments where different systems may use incompatible codecs. Its ability to transcode ensures high-quality voice communication regardless of the underlying technology, thus maintaining clarity and reducing latency.

In terms of deployment, the Polycom Vega Gateway can be implemented as both a hardware appliance and a virtualized solution, providing businesses with deployment flexibility based on their IT environment. This adaptability is crucial for organizations looking to optimize their resources and scale their telephony solutions as needed.

Security is another key characteristic of the Vega Gateway. It incorporates robust encryption protocols, such as SRTP (Secure Real-time Transport Protocol), to safeguard voice communications against potential threats. Additionally, the gateway features firewall traversal capabilities, making it suitable for deployment in various network environments without compromising on security.

The gateway is also designed with ease of management in mind. Administrators can configure and monitor the device through a web-based interface or command line, ensuring that managing the system remains straightforward even for complex setups. Logging and reporting functionalities further enhance administrative oversight, allowing organizations to analyze their VoIP usage and optimize resource allocation.

Overall, the Polycom Vega Gateway is a comprehensive solution that addresses the complexities of integrating modern VoIP technology with legacy systems. With its robust feature set, diverse technological support, and commitment to security and manageability, the Vega Gateway stands out as an essential tool for organizations looking to enhance their communication strategies in an ever-evolving digital landscape.
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