MediantTM 1000 MSBG The Ideal Enterprise Platform for hosting IP-PBX and VAS Applications
Powered by AudioCodes Multi-Service Business Gateways (MSBG) Introduction
IP-PBX, voice applications and Value Added Services (VAS) developers targeting Unified Communications are facing a variety of challenges when developing and deploying services in the enterprise space. Selecting the platform on which the application will be running is instrumental for a successful deployment of any application. Multi-Service Business Gateways (MSBG) form an ideal platform for hosting IP-PBX and VAS applications in a multi-functional enterprise oriented device. This application note will review a handful of the most commonly encountered challenges and how the AudioCodes Mediant 1000-MSBG intends to solve them.
Current Challenges Experienced in Enterprise Telephony Networks
Difficult Integration in a multielement environment
The IP-PBX is not the only network element in a typical enterprise network. Installing an IP-PBX, could pose several integration efforts with a variety of elements: Media Gateways which are converting IP traffic to TDM and PSTN networks, Session Border Controllers (SBCs) in charge of securing and monitoring VoIP transactions, Firewalls and Data Security devices, Routers, Switches etc. Completing integration with a variety of elements, facing the challenge of selecting different protocol flavors and network configurations is quite a headache for any system or network integrator.
Targeting SMBs How to keep it simple
With an estimated 35 million organizations worldwide, the Small-Medium Business (SMB) market is one of the main drivers of enhanced IP voice application adoption. SMBs usually lack internal IT human resources and rely mainly on solution providers and system integrators to supply their communication needs. Ease of installation, minimal cabling, simplified management and remote troubleshooting are important factors for launching a successful and sustainable service in this environment. A multi-vendor stacked box solution is not likely to be the best choice in this case. Such a solution results in time-consuming finger-pointing among the different vendors causing customer dissatisfaction. In addition, it requires a lengthy learning curve by the solution provider staff for mastering a variety of management tools needed for ongoing operations.
Securing your telephony application
A direct trade-off of the IP network flexibility and flatness is the vulnerability to security hazards such as phishing, spamming and Denial of Service (DoS), threatening VoIP applications as well as Data traffic. Enterprises today take advantage of Session Border Controllers (SBC) to monitor all VoIP traffic and actively block any malicious communication from entering the organization network. An Enterprise-class SBC can be used to hide the enterprise IP network topology from any potential intruder thus providing a higher level of immunity against security hazards. In addition, encryption mechanisms (such as SRTP, IPSec and SIP over TLS) are commonly used today. Taking care of this suite of capabilities is a necessity but also a burden for any application or IP-PBX developer.
Fitting into All-IP networks
Both service providers and enterprises are quickly embracing All-IP networks in which Voice over IP and Unified Communications are just a few of many applications mounted on this infrastructure. Introducing the IP-PBX and SIP based application servers, and cost effective SIP trunks or IP Centrex Voice services seems ideal we all speak the same language of SIP, dont we? Well, not really SIP can be open to variations, flavors and interpretations. Moreover, these degrees of freedom are often abused to create proprietary types of this standard protocol aimed at clutching the entire customer network in a single vendors hands. Reality proves that SIP conversion or translation is often required between the enterprise owned IP-PBX and a service provider SIP trunk. In other cases the IP-PBX needs to communicate with an application server and both are not fully interoperable (e.g. Microsoft Unified Communications which uses proprietary extensions for SIP). Is your platform ready for All-IP environments and does it have a rich enough interoperability record?
Enabling branch office network survivability
In many service oriented enterprises and businesses that currently conduct mission critical operations, the need to ensure continuous operation of office communication is fundamental. In other words, can a branch office maintain normal telephony operations in case the connection to the central IP-PBX is down? Most of the common solutions tackling a central (Headquarters) server outage involve a costly duplication of part of the application server in each remote branch office. This common approach can incur extremely large investments and integration efforts. Is there a thinner and meaner solution for this challenge?

The processing power barrier how far can my IP-PBX/VAS platform go?
A common trend among IP-PBX and VAS developers is to leverage on cost-effective PC-based platforms, using open-source solutions for their applications. Using such a strategy can produce low-cost platforms primarily addressing low to medium scale deployments. In many cases these PC-based platforms are limited and are quickly choked when trying to deploy CPU-consuming media processing tasks. Advanced capabilities such as conferencing, transcoding (or even the combination of the two), streaming, recording and enhanced detectors are out of reach for such platforms.
Targeting optimal Voice Quality
Currently, it seems that it is a difficult task to satisfy customers. There are continuously rapid developments in voice technology, especially in regards to superior voice quality. Watch this space for further developments such as the introduction of High Definition voice coders. With the updating of voice technology, it is important to question whether your platform is ready to support any newly introduced coders.
Simplifying the fulfillment process under an OEM model
Many IP-PBX vendors would require their delivered platforms to be branded and labeled as their own products even though they are based on Other Equipment Manufacturer (OEM) platforms. From an end customers point of the view, this ability presents a stronger position in regards to both commercial and technology aspects. Private labeling prevents customer confusions in identifying the front-taking vendor and therefore improves the entire fulfillment model. In fact, not all platform providers are capable of enabling this and experienced enough for this type of sales model.
How Multi-Service Business Gateways (MSBG) are Addressing IP-PBX developer challenges?
What is an MSBG? AudioCodes Mediant 1000 MSBG is an integrated device incorporating voice, data, security, survivability and value added applications and has the following functionalities: 1. A modular VoIP Media Gateway supporting a mix of E1/T1/J1, BRI and analog FXS/FXO lines 2. A Session Border Controller securing voice traffic and performing SIP normalization fo SIP Trunking services 3. A statefull Firewall device securing data traffic and performing Deep Packet Inspection (DPI) 4. A Data Router and LAN switch 5. A WAN access device with multiple WAN options 6. A Stand Alone Survivability agent acting as a local emergency proxy server which takes over on WAN connection outage or central IP-PBX failure. In addition, PSTN Fall back is available for emergency calls and continuous operation 7. An OSN (Open Solution Network) server an Intel-based CPU and hard disk drive module is open for hosting any 3rd party application e.g. IP-PBX 8. A DSP farm module available for enhanced voice processing (e.g. Conferencing, Transcoding) and controlled by standard protocols of SIP and MSCML

Digital Lines

Analog Lines

Gateway & SBC

Router & WAN

Power Supply

OSN Server

Hard Disk Drive

LAN Switch
We can easily demonstrate how the MSBG creates a powerful combination overcoming the challenges listed above: Difficult integration - Integration is built-in when all elements are delivered as a unified device Keeping it simple - Simplicity of deployment, management and maintenance is clearly achieved when using the same management tool and actually having a single vendor for multiple network elements Voice security hazards - Enhanced voice security features as well as SIP mediation and translation are provided by the embedded Session Border Controller Ready for All-IP networks SIP mediation is performed leveraging on AudioCodes rich interoperability record and built-in transcoding capabilities
Branch office Survivability - Enabled by the SAS (Stand Alone Survivability) agent embedded in the MSBG. In addition a dual power supply brings an extra level of box survivability Voice processing limits - In addition to the OSN server, ready to host IP-PBX applications, the MSBG provides a built-in IPmedia processing module enabling enhanced voice processing tasks such as conferencing and transcoding, extending the IP-PBX breadth of functionalities and performance Optimal voice quality - Watch this space for the introduction of an advanced voice technology which will enable any IP-PBX application to easily upgrade its voice quality offering. The MSBG allows your IP-PBX application to be more future proof as it can be smoothly and constantly upgraded with the latest voice technology provided by AudioCodes Simplifying fulfillment process AudioCodes is a leading supplier to global telecom OEM vendors. Solid experience in supporting OEM models allows AudioCodes to provide OEM vendors with important services such as full private labeling of gateway hardware and software (management interface). In addition, AudioCodes can load the OEM vendors software and configuration files onto the gateway during the manufacturing process, delivering the Mediant 1000 MSBG fully configured and ready to be delivered to the end customer, thereby maximizing the profit for the OEM vendor

Mediant 1000 MSBG

Summary
A well constructed MSBG is an ideal platform for a variety of IP-PBX and VAS application developers aiming at enhancing their offer, enriching their solution capabilities and simplifying their platform deployment and maintenance. Basing voice applications on AudioCodes MSBG unique capabilities and advantages, results in higher customer satisfaction, better cost performance, and competitiveness of the provided solution.

About AudioCodes

AudioCodes Ltd. (NasdaqGS: AUDC) provides innovative, reliable and cost-effective Voice over IP (VoIP) technology, Voice Network Products, and Value Added Applications to Service Providers, Enterprises, OEMs, Network Equipment Providers and System Integrators worldwide. AudioCodes provides a diverse range of flexible, comprehensive media gateway, and media processing enabling technologies based on VoIPerfect -- AudioCodes underlying, best-ofbreed, core media architecture. The company is a market leader in VoIP equipment, focused on VoIP Media Gateway, Media Server, Session Border Controllers (SBC), Security Gateways and Value Added Application network products. AudioCodes has deployed tens of millions of media gateway and media server channels globally over the past ten years and is a key player in the emerging best-of-breed, IMS based, VoIP market. The Company is a VoIP technology leader focused on quality and interoperability, with a proven track record in product and network interoperability with industry leaders in the Service Provider and Enterprise space. AudioCodes Voice Network Products feature media gateway and media server platforms for packet-based applications in the converged, wireline, wireless, broadband access, cable, enhanced voice services, video, and Enterprise IP Telephony markets. AudioCodes headquarters and R&D are located in Israel with an additional R&D facility in the U.S. Other AudioCodes offices are located in Europe, India, the Far East, and Latin America.
International Headquarters 1 Hayarden Street, Airport City Lod 70151, Israel Tel: +972-3-976-4000 Fax: +972-3-976-4040 AudioCodes Inc. 27 Worlds Fair Drive, Somerset, NJ 08873 Tel:+1-732-469-0880 Fax:+1-732-496-2298 Contact us: www.audiocodes.com/info Website: www.audiocodes.com
2008 AudioCodes Ltd. All rights reserved. AudioCodes, AC, Ardito, AudioCoded, NetCoder, TrunkPack, VoicePacketizer, MediaPack, Stretto, Mediant, VoIPerfect and IPmedia, OSN, Open Solutions Network, Whats Inside Matters, Your Gateway To VoIP, 3GX, InTouch, CTI2, CTI Squared, Nuera and Netrake are trademarks or registered trademarks of AudioCodes Limited. All other products or trademarks are property of their respective owners. Ref. # LTRM-09041 09/08 V.1

AudioCodes Carrier/Service Provider Applications Quality, Cost-effective Solutions for Every Network
An examination of applications of Voice over IP in carrier and service provider networks that can reduce costs and expand addressable markets demonstrating the flexibility and capabilities of AudioCodes CPE and Networking products.

Introduction

AudioCodes Ltd. designs and manufactures a diverse range of award-winning media gateway, media server, network security and IP Phone products and technologies that enable the new voice infrastructure. AudioCodes products play an important role in the migration of the global telecommunications infrastructure from TDM to IP technologies by interconnecting the new IP, Wireless and legacy TDM core networks. In addition, AudioCodes products also enable enterprise and residential customers to connect their TDM equipment to IP networks, IP equipment to the legacy TDM core or dissimilar IP equipment with IP-to-IP mediation. AudioCodes delivers its reliable, innovative and cost-effective products around the globe to a range of markets including carriers, service providers, telecommunication equipment manufacturers, enterprises, systems integrators, distributors and value added resellers.
AudioCodes in the Network
Figure 1: Macro View of the Global Telecommunications Networks

Typical Applications

AudioCodes Media Gateway products can be applied to an almost endless array of applications and configurations. However, a few common example applications, as described in this application note, demonstrate the role that AudioCodes Media Gateways play in service provider and carrier networks.
Hosted Voice-over-Broadband for Residential/SOHO
A broad spectrum of carriers and service providers are now offering services to residential and SOHO subscribers utilizing Voice over Broadband (VoBB) to deliver a quality and cost-effective replacement to traditional residential telephony service. With VoBB, both the core of the network and the last-mile delivery mechanism utilizes IP infrastructure. The functionality of the VoBB network is controlled and services are managed with one of the many brands of Softswitch applications and/or SIP Application Servers.
A list of Softswitch partners can be found at: www.audiocodes.com/solution-partners/softswitch
Figure 2: Hosted Voice-Over-Broadband for Residential / SOHO Connecting the VoBB application to PSTN carriers is accomplished by using an AudioCodes Mediant 3000/5000/8000 carrier-class media gateway. The gateway converts the IP calls to either T1/E1 or DS3 formats, interfacing with Class 4 switches in the PSTN. In many cases, the last mile delivery is accomplished over existing unmanaged or open internet facilities. In these cases, an AudioCodes nCite Session Border Controller is utilized, protecting the carrier network core from attack and enabling NAT traversal to the subscriber premise. At the customer premise, subscribers are connected to the VoBB application via an AudioCodes MediaPack 20x Analog Telephone Adapter (ATA). The ATA connects legacy analog telephones, fax machines or credit card machines at the customer premise to the service. In larger multi-tenant or hospitality applications, many installations find it advantageous to use one or more AudioCodes MediaPackTM 124 (MP-124) analog media gateways in a common wiring closet. The MP-124 provides 24 FXS ports and connects to the existing analog telephone lines that lead to each residential unit and allows continued use of existing legacy analog equipment. Using the MP-124 in multi-tenant applications simplifies many installations and reduces the number of devices and per-subscriber equipment and maintenance costs.
To allow subscribers access to advanced features and higher-fidelity HD VoIP calling, the 300HD IP Phone products can be used on-premise. With superior voice quality, large display and multiple line appearances, small-office/home-office workers and residential customers can enjoy business-grade IP communications services at home. In configurations where the carrier peers with other carriers via IP, an AudioCodes nCite Session Border Controller is frequently utilized to provide interoperability and security between the two carrier networks.

IP Centrex

IP Centrex is an IP-based hosted business communications solution, replacing legacy Centrex services for small and medium businesses. With IP Centrex, the service provider installs phones and other access devices in the customer premise and provides application services with a hosted software application that is centrally located in the service provider network operations center. A significant business advantage for IP Centrex services is the reduced up-front costs for the business, eliminating the fixed costs of the switching equipment usually associated with premise-based IP-PBXs. IP Centrex services are usually sold as a per-seat / monthly subscription model, allowing businesses to control costs as they grow. Compared to residential VoBB applications, SMB and enterprise IP Centrex deployments have many more subscribers across numerous networked facilities. As a result, carriers that offer IP Centrex services must support a much higher number of simultaneous calls and a greater level of reliability and survivability.

Figure 3: IP Centrex

In these applications, the AudioCodes Mediant 1000 MSBG provides the connectivity and point of demarcation between the carrier WAN and the enterprise LAN. The MSBG provides important security and survivability functions, including: Data Router managing traffic between the service provider and the on-site data equipment or PCs SIP Aware Firewall blocking malicious traffic and managing the pinholes in the firewall to match the negotiated ports for the RTP streams Stand Alone Survivability enabling continued operation in the case of a WAN failure Local e911 routing 911 emergency calls to a local PSTN line, ensuring that the emergency services arrive at the right location and in cases where the WAN is down
SIP Trunking for TDM PBXs
SIP trunking is exploding in popularity as a means to eliminate the cost of traditional T1 voice-only circuits and moving the voice traffic over a data circuit to a SIP trunking service provider. By combining physical facilities and consolidating traffic, the SIP trunking service provider can offer identical services such as legacy TDM T1 trunks, but at a fraction of the cost. However, SIP Trunks cannot be directly integrated into the vast majority of the installed TDM PBXs. Integrating the two requires a media gateway to convert from SIP to the T1 format that is compatible with the PBX.

Figure 4: SIP Trunking for TDM PBXs A significant business benefit of this strategy is that it allows the cost savings to be realized immediately and postpones/separates the decisions or costs associated with PBX replacement. This strategy also avoids purchases of expensive and special-purpose upgrades to an aging TDM PBX that will eventually be replaced. In many cases, waiting for the replacement of the PBX can cause months of evaluations, RFIs, departmental buy-in and securing credit. Avoiding these delays is important for reducing the time-to-close for service providers. The AudioCodes Mediant 1000 is a prime example of a modular and scalable media gateway that converts from the SIP trunking service to a wide range of TDM protocols and physical interfaces. For very small analog-only installations, the AudioCodes MediaPackTM 11x line of analog media gateways is an alternative low-cost solution.
A significant advantage of this strategy is that if at some point in the future when the TDM PBX is replaced with an IP-PBX, the Mediant 1000 media gateway devices can be upgraded to a Mediant 1000 MSBG. Once upgraded, the MSBG will continue to play an important role in the IP-PBX interoperability, security and survivability (see below).

SIP Trunking for IP-PBXs

As customers begin to replace their TDM PBXs with IP-PBXs, the interface to SIP Trunks takes on new challenges, including: SIP Interoperability does the IP-PBX interoperate with the SIP trunks today and in the future? Security how will the enterprise and service provider protect each other from malicious attacks? Survivability will the enterprise be able to make emergency calls in a situation where the WAN or SIP trunks are inoperable due to network or equipment failures?
Figure 5: SIP Trunking for IP-PBXs The Mediant 1000 MSBG can solve these challenges and provide connectivity between the SIP trunking service provider and the enterprise IP-PBX. The MSBG provides important security and survivability functions, including: Data Router managing IP data traffic between the service provider and the on-premise data equipment SIP Aware Firewall blocking malicious traffic and managing the pinholes in the firewall to match the negotiated ports for the RTP streams Enterprise-class Session Border Controller securing the interface between the enterprise and service provider and solving NAT traversal issues Stand Alone Survivability enabling continued operation in the case of a WAN failure Local e911 routing 911 emergency calls to a local PSTN line, ensuring that the emergency services arrive at the right location or in cases where the WAN is down Local Analog Devices including fax machines, credit card authorization machines, alarm panels and other devices that need an FXS port on-premise

Inter-Office Voice Networking (Dedicated Line Replacement)
Many distributed enterprises use dedicated TDM voice circuits or PSTN calling to make phone calls between their facilities. The cost of inter-office calling or dedicated circuits is frequently a significant portion of the total communications expenditures. At the same time, most distributed enterprises also depend on a data service provider supplied WAN that provides data connectivity between the various offices, facilitating point-of-sale and inventory systems.
Figure 6: Inter-Office Voice Networking (Dedicated Line Replacement) By interconnecting the existing PBX or Key Systems at offices with AudioCodes media gateways, the data service provider can transport voice traffic over the WAN. This strategy benefits the business by eliminating the cost of dedicated TDM circuits and toll charges for inter-office calling. Advanced installations also utilize least-cost routing techniques to reduce the cost of off-network calling.
CPE Media Gateway Products
AudioCodes Customer Premise Equipment (CPE) products include a range in densities from very small two line Analog Telephone Adapters (ATAs) up to 16 T1/E1 circuit digital trunking gateways. The AudioCodes CPE line supports SIP, H.248 and H.323 (depending on the model); and are interoperable with over 100 different software applications from our eco-system partners.
Figure 7: AudioCodes CPE Media Gateway Product Line
MediaPack low-density products (depending on the model) support analog FXS or FXO lines, or digital ISDN BRI circuits. The mid-density Mediant 600 is a cost optimized digital media gateway that supports either eight ISDN BRI circuits or up to two digital T1/E1 circuits. The flexible and scalable Mediant 1000 is highly modular, using hot-swap modules that support a wide range of analog FXS/FXO, ISDN BRI, and up to four digital T1/E1 voice circuits. The Mediant 1000 also offers the unique Open Solutions Network (OSN) server, allowing customer applications to reside within the media gateway and enable one-box communications appliances. The Mediant 2000 addresses the high end of the CPE market with a scalable digital-only media gateway capable of up to 16 T1/E1 circuits. The newest member of the family is the Mediant 1000 Multi-Service Business Gateway (MSBG). This platform integrates a number of separate devices, including WAN network access, router, firewall, session border controller, media gateway and application server into one compact and easy to install package. The Mediant 1000 MSBG solves many of the challenges that service providers and large distributed enterprises have been struggling with as they bring VoIP to the mass market.
Carrier and High Availability Media Gateway Products
Moving up in density, AudioCodes Mediant product line offers a complete family of Carrier and High Availability media gateways. With densities from 480 up to 16,000 channels, this product group fits into carrier core network infrastructure and large enterprise applications where density and reliability are important factors.

Figure 8: Carrier and High Availability Media Gateways
Beginning with the Mediant 3000, AudioCodes also offers high availability features, including 1+1 and N+1 redundant gateway blades, dual power supplies, fans and network switches as required to serve the high reliability demands of large carriers.
AudioCodes IP Phone Products
AudioCodes 300 Series of HD VoIP enabled IP Phones offer a new dimension of voice call quality and clarity for the Enterprise and Service Provider markets. This product line enables AudioCodes to provide an end-to-end solution which relies heavily on the technological infrastructure and proven track record in providing state-of-the-art high quality VoIP products for Enterprise, Wireline, Wireless and Cable applications.

Entry Level Model

LCD Display with backlight 2 x 16 characters 10 speed dial keys VoIPerfectHD functionality Speakerphone PoE or Power adaptor

Premium Model

Graphic LCD Display 132 x 64 pixels 4 lines support with indicators 12 Speed Dial keys with Busy Lamp Field Headset Interface VoIPerfectHD functionality PoE or Power adaptor

Executive Model

Color TFT LCD Display 480 x 272 pixels 6 lines support with indicators 12 Speed Dial keys with Busy Lamp Field VoIPerfectHD functionality PoE or Power adaptor
The 300 Series of IP Phones meets a growing demand for High Definition VoIP solutions in end-user phones and terminals, providing high voice fidelity, advanced security and features and enhanced user interface. The 300 Series of IP Phones are widely interoperable with numerous IP-PBXs, Softswitches and IP Centrex solutions.
AudioCodes Differentiators
These applications and many more leverage key AudioCodes points of differentiation: Superior Voice Quality as demonstrated at the ETSI Speech Quality Test Event, where AudioCodes was the only participant to successfully pass all 12 rigorous tests Interoperability validated and certified with over 100 industry leading software applications and PBXs, reducing integration time and complexity Security support for SRTP and SIP over TLS, HTTPS and other industry standard security protocols allows for end-to-end security for sensitive applications in government, financial and healthcare industries Consistency based on common core technology, AudioCodes products offer a consistent user interface, product feature set and broad interoperability across the entire line, from the smallest ATA all the way up to the largest carrier-class gateway. This dramatically reduces training and the time spent performing interoperability testing Scalability a range of product densities and expandability enables managed and cost-effective growth Energy Efficiency lower power consumption reduces operational costs for years to come Affordability with a diverse range of products that fit in to almost every budget

More Information

For more information on these and other AudioCodes products, see: www.audiocodes.com/products To see a number of related case studies showing these deployment models in the real-world, see: http://www.audiocodes.com/case-studies

About AudioCodes

AudioCodes Ltd. (NasdaqGS: AUDC) provides innovative, reliable and cost-effective Voice over IP (VoIP) technology, Voice Network Products, and Value Added Applications to Service Providers, Enterprises, OEMs, Network Equipment Providers and System Integrators worldwide. AudioCodes provides a diverse range of flexible, comprehensive media gateway, and media processing enabling technologies based on VoIPerfect - AudioCodes underlying, best-of-breed, core media architecture. The company is a market leader in VoIP equipment, focused on VoIP Media Gateway, Media Server, Session Border Controllers (SBC), Security Gateways and Value Added Application network products. AudioCodes has deployed tens of millions of media gateway and media server channels globally over the past ten years and is a key player in the emerging best-of-breed, IMS based, VoIP market. The Company is a VoIP technology leader focused on quality and interoperability, with a proven track record in product and network interoperability with industry leaders in the Service Provider and Enterprise space. AudioCodes Voice Network Products feature media gateway and media server platforms for packet-based applications in the converged, wireline, wireless, broadband access, cable, enhanced voice services, video, and Enterprise IP Telephony markets. AudioCodes headquarters and R&D are located in Israel with an additional R&D facility in the U.S. Other AudioCodes offices are located in Europe, India, the Far East, and Latin America.
International Headquarters 1 Hayarden Street, Airport City Lod 70151, Israel Tel: +972-3-976-4000 Fax: +972-3-976-4040 AudioCodes Inc. 27 Worlds Fair Drive, Somerset, NJ 08873 Tel:+1-732-469-0880 Fax:+1-732-496-2298 Contact us: www.audiocodes.com/info Website: www.audiocodes.com
2009 AudioCodes Ltd. All rights reserved. AudioCodes, AC, AudioCoded, Ardito, CTI2, CTI, CTI Squared, HD VoIP, InTouch, IPmedia, Mediant, MediaPack, NetCoder, Netrake, Nuera, Open Solutions Network, OSN, Stretto, TrunkPack, VoicePacketizer, VoIPerfect, VoIPerfectHD, Whats Inside Matters, Your Gateway To VoIP and 3GX are trademarks or registered trademarks of AudioCodes Limited. All other products or trademarks are property of their respective owners. Ref. # LTRM-09047 03/09 V.1