Polycom Vega Gateway appendix Telephony Network

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This configuration can form a good starting point for migrating to VoIP without immediately losing the existing telecoms infrastructure.

The Vega can be configured to either route specific telephone numbers to the SIP proxy – where only a small set of numbers is to be handled by the VoIP system, or all calls can be forwarded to the Proxy for it to decide how all calls should be routed.

Use of a Proxy can also assist in NAT and firewall traversal.

If a significant proportion of the company’s calls are made between sites then it is possible that further cost savings can be made by reducing the number of channels connected to the PSTN.

Telephony Network

-For PBXs

•E1 Euro ISDN signalling is supported by Vega 400 and Vega 100

•T1 NI1 & NI2 signalling is supported by Vega 400 and Vega 100

•T1 Loop start, Ground start and Wink start CAS signalling is supported by Vega 400 and Vega 100

•BRI Euro ISDN signalling is supported by Vega 50 BRI

•Analog connection is possible, but is not preferred (for details on analog connectivity see later section)

-For home-workers

•Analog FXS gateway to connect to analog phone

•Optional FXO port to allow local connection to PSTN

•IP handset or soft phones may also be used

IP Network

•Recommend – private IP network between sites

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

•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

•Consider VPN between sites as this:

-removes any issues with firewalls / NAT

-encrypts audio and management data

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

•A VPN can be used from the home user to the company LAN. This is important for securing data access to the company site, and for VoIP it gets around NAT traversal issues

User experience

-For PBX users that are not routed via the Proxy

•By grooming the traffic on the PSTN side of the PBX all user PBX functions will continue to operate. This system will operate in exactly the same way as the phone system worked before the gateways were installed, for example, even existing shortcode dialling will continue to work (as the PBX will expand this to a full number before presenting it to the PSTN).

Version 2.1

16 March 2006

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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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Contents Analog Applications Pre-sales Engineer’s guideVoIP between sites IP Network Telephony NetworkUser experience USPs3rd party product choices Future extensionsVoIP between sites and home-worker / remote office Telephony Network USPs Version March Vega Gateway Scenarios Telephony Network USPs SNOM, Mitel MKC, IVR technologies, NetSapiens Analog long line extensions IP Network IP Telephony IP Network Aim To use internet to provide cheap inter-country calling Pstn toll bypassIVR technologies Tangerine Inc TDM to / from VoIP converter Future extensions 3rd party product choices Aim To save leased line call costs between sites Leased line eliminator for Qsig connections between sitesUser experience Analog connections Vega FXS for analog telephones Considerations FXO connection to a PBX FXS connection to a PBX ConsiderationsPBX to PBX connectivity using both FXS and FXO Calls FXS to FXOCalls FXO to FXS PBX to PBX connectivity using FXO only PBX to PBX connectivity using FXS onlyAnalog long line extensions Mass analog connection using a Vega 400 and a channel bankAppendix 1 3rd Party Products Alceo ArelNet Softswitch Asterisk SIP proxyAlcatel Thomson SpeedTouch 610 router Axiom provisioning system BroadsoftGNU H.323 GateKeeper Ingate SIParator GenesysInteractive Intelligence PBXnSIPSonicWall Siemens’ OpenScape SIPExchange PingTelSnom 4S, proxy, media server, Nat traversal filter Tangerine Inc SIP / H.323 application server TelewareITSPs and VoIP services Existing firewalls Appendix 2 Things to consider Audio quality

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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