-For home users who are routed via the proxy

•Home-workers will be able to dial extension numbers of any of the PBXs (as the proxy will resolve the phone number and route the call to the appropriate Vega gateway). Calls made to users on a PBX will appear to the PBX to come from the PSTN and so will not provide the advanced functionality to the home-worker that an extension user would have (e.g. voice mail, call transfer, conferencing). The advanced features available to the home- worker will be those available from the SIP proxy.

The home-worker will be able to dial PSTN numbers. If the company sites are in different areas, and especially if the sites are in different countries the SIP proxy can provide least cost routing functionality to route the call to the most appropriate Vega to deliver the call to the PSTN.

•For incoming calls to the home-worker, it is best that the home-worker is given one of the DDI numbers available in the ISDN trunk. When the Vega receives a call from the PSTN to that phone number it will groom the call off and forward it to the home-user.

Colleagues on the PBX will have to dial the home-worker’s full number (not just the extension number) so that the call is routed by the PBX towards the PSTN. When the Vega receives a call from the PBX to that phone number it will groom the call off and forward it to the home-user.

-For users who have their calls routed via the proxy

•This enables users to have dual ringing – or multiple parallel ringing, for instance having your desk phone (connected to the PBX) and your home-office VoIP phone both ringing whenever you receive an incoming call.

•Users can have VoIP pre-processing features of their calls, features like the ability to decide which order your phones are called in, and which callers are allowed to disturb you and which should be routed through to voice mail.

-Proxy initiated calls

•Proxy initiated functionality will be available, e.g. where the user can use a web browser to access the proxy and drag and drop user icons to initiate, for example a conference

•Calls that were connected using the Proxy will retain the capability to be controlled by the proxy, for instance call transfer could be initiated by the user on the web interface to the proxy if the original call was routed via the proxy

USPs

•VegaStream have a wide range of VoIP gateways to provide connections for both home and office based workers.

Considerations

•Check the numbers that are presented to the PSTN consider for example:

-does the PBX present both National format and local format numbers to the PBX?

-does the PBX insert any “carrier select prefix” to the dialled number?

-can “block caller ID” or other prefixes be used in dialled numbers?

•Be careful of interactions between PBX functionality and Proxy functionality, e.g. if Voice- mail is enabled on both the PBX and the VoIP system, when does each get the voice-mail, and is it acceptable that users may have to check two places to collect their voice-mail?

•Consider NAT traversal for home worker

•The maximum number of parallel ringing calls into the PBX may be limited by the maximum number of SIP registrations that the Vega can make.

•Emergency calls should be routed directly to the PSTN, not over the VoIP link

Version 2.1

16 March 2006

Page 10 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

Page 9 Page 11
Page 10
Image 10
Polycom Vega Gateway appendix USPs
Page 9 Page 11

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.
Top Page Image Contents