1. © 2007 AudioCodes Ltd. All rights reserved. AudioCodes Technical Advantage for Microsoft Unified Communications

2. AudioCodes and Microsoft Long standing technical alliance –Support for VoIP gateways SIP interfacing has been developed with AudioCodes Mediant 2000 Marketing partnership –AudioCodes MediaPacks were the only gateways chosen for the “OCS Ignite Roadshow” –Global train-the-trainer tour in Q2/07 in San Francisco, Toronto, London, Amsterdam, Singapore and Sydney –Replicated locally in territories Dependability and trust –AudioCodes gateways are the only gateways used within Microsoft IT for OCS deployment

3. Overview AudioCodes comprehensive set of Media Gateways are the natural selection Perfect gateway size for every mission, from small to very high scale, from Basic (Plan B) to Hybrid and Advanced (Plan A). Top voice quality, stability and manageability Deployment freedom around the world thanks to homologations and certifications Feature richness and flexibility for deployment options Scalability and flexibility Security and resiliency Backed by a well established, financially stable, global company Global 24x7 support Professional services and network planning consulting services Next day availability through a global chain of distributors

4. Supported Gateways AudioCodes provides a full range of gateway types as defined by Microsoft –Basic (Plan B) – Requires an external server with Mediation Server Mediant 1000, 2000 MediaPack range (2-24 ports FXS and FXO) –Hybrid Gateways – Mediation Server hosted internally in the gateway Mediant 1000, 2000 –Advanced (Plan A) – All Mediation Server capabilities implement by gateway including DSP level support for Real Time Audio (RTA) codec* * Planned for 2008

5. Microsoft Labeling Gateways for Microsoft Unified Communications installations are uniquely labeled Mediant 1000 Basic, Hybrid and Advanced* Mediant 2000 Basic, Hybrid and Advanced* MediaPack Basic * Planned for 2008

6. Homologations and Certifications Mediant and MediaPack are homologated worldwide enabling connectivity to PSTN Enabling migration path towards pure OCS deployment

7. Scalability Biggest range and highest scalability of Media Gateways for every customer size –Low end demo kit MediaPack 114/2FXS/2FXO and MediaPack 118/4FXS/4FXO –Entry level and Mid Range Mediant 1000 with up to 4 E1/T1, plus a mix of up to 20 BRI, FXS, FXO in a single 1U chassis Supports “Hybrid Gateway” configuration with hosted Mediation Server on internal CPU for up to 16 active channels (fractional E1/T1 or BRI, FXS, FXO) –High Level Mediant 2000 with up to 16 E1/T1 in a single 1U chassis Supports “Hybrid Gateway” configuration with hosted Mediation Server on internal CPU for up to 4 fully functional E1/T1 –High End Mediant 3000 with up to 63 E1/ 84 T1 in a single 2U chassis* Mediant 8000 with up to 240 E1/ T1 in a single 12U chassis* –All with uniform protocol support and capabilities Highest Scale In Market * Formal certification pending

8. Scalability Hybrid Gateways Mediant 1000 Hybrid –fractional E1/T1 interfaces (up to 16 channels), as well as 8 BRI (16 calls) and 16 FXO interfaces Mediant 2000 Hybrid –Up to 4 E1/T1 (120 concurrent RTA sessions)

9. Advanced Topologies Mediant 1000 is the only Gateway certified by Microsoft that supports E1/T1, BRI, FXO, FXO interfaces in a single 1U chassis –Can operate concurrently –Same chassis supports various modules so customers can grow from FXO/BRI interfaces to E1/T1 interfaces without changing field equipment Facilitates deployments in advanced network topologies –Example (1) – Connecting to both OCS & Exchange at the same time –Example (2) – Fax adapters for OCS –Example (3) – Drop & Insert configuration

10. Advanced Topologies (1) OCS and Exchange in the same network AudioCodes gateways can simultaneously operate with OCS and Exchange Enables OpEx reduction by using a single gateway Enables PBX users and OCS users to connect to the Exchange Server and use the Unified Messaging capabilities

11. Advanced Topologies (2) Enabling Fax services on OCS OCS does not provide native support for connectivity of Fax machines AudioCodes gateways (Mediant 1000 and MediaPack) enable existing Fax machines at the enterprise to remain active –Using the advanced dialing plans, it is possible to continue regular usage of the Faxes

12. Advanced Topologies (3) Using Gateways to reduce PSTN connections Connecting the PBX to the OCS requires a dedicated trunk for interfacing the gateway, and an additional trunk for preserving PSTN connectivity AudioCodes gateways enable connectivity in a “Drop and Insert” configuration eliminating the need for an additional costly trunk on the PBX

13. Advanced Gateway capabilities Native support for –PSTN to SIP mapping (PRI, CAS) –SIP TLS, TCP –sRTP –Full SIP redundancy options –Full load sharing options using DNS, SRV, round robin (also internal DNS tables) –IPSec –Multi VLAN option to separate management, control and Voice on different IP address and VLAN –Internal routing tables with alternative routing capabilities for complex network scenarios –Advanced digits manipulation for source and destination numbers Coming in the next release –Support for VLAN per trunk group (for Voice separation) – Highly important for hosted solution

14. Advanced Gateway capabilities (2) Stand-Alone Survivability (SAS) for enabling continued SIP phone service in case of WAN failure –SIP Phones register to SAS agent on AudioCodes gateways –In case of WAN failure, the SAS agent provides basic dialing plan services until connection is restored –Call to and from the PSTN are still available using the AudioCodes PSTN interfaces –Advanced dialing plans facilitate any type of call routing to be implemented EMS for managing a large distributed enterprise deployment from a single IT operations center

15. IP to IP capabilities* Enabling connectivity of non-certified IP-PBX to OCS by –Mapping SIP to SIP over TLS and TCP –Converting RTP to SRTP –Enabling Full SIP redundancy options Full load sharing options using DNS, SRV, round robin (also internal DNS tables) –IPSec –Internal routing tables with alternative routing capabilities for complex network scenarios –Advanced digits manipulation for source and destination numbers * Contact AudioCodes for availability IP-PBX IP Phones Mediant 1000/2000 Office Communications Server 2007

16. Modularity Mediant 1000 modularity enables mix & match of FXO, FXS, BRI and E1/T1 interfaces in a single 1U gateway Mediant 2000 “pay-as-you-grow” enables savings on initial CAPEX and easy remote upgradeability of capacity Mediant 2000Mediant 1000

17. Security Support STUN, RADIUS Built-in firewall Provisioning 1.HTTPS – over SSL 2.Web server Password management (existing) 3.Access and authentication using RADIUS server 4.SNMP with IPSec 5.Telnet over SSL 6.SSL certificate – User defined “subject name” for the TLS certificate Control –SIP over TLS Bearer –SRTP - RFC3711

18. High Availability, Resiliency and Scalability Integral high availability features –Dual power supply configuration on Mediant 1000, 2000 and 3000 –Dual Ethernet –Comprehensive set of features for alternative routing options to cope with various limited service scenarios (PSTN connectivity error, IP layer failure, and more) –PSTN Fallback AudioCodes gateways enable field scalability upgrades using a feature key –Enables the network to grow without the need to send equipment or personnel to the field

19. Configuration & Management AudioCodes Web Interface (HTTP/HTTPS) (full Chassis management)- Up to 5 simultaneous connections SNMP-based alarms for higher-level management system Syslog with flexible filters (for events, alarms and CDRs) RADIUS (for AAA) Telnet (over SSL) – Console CLI – for configuration and debugging (CLI user manual is now available) RS-232 - Console BootP/TFTP/FTP Performance monitoring: allows collecting and retrieving current and historical performance data CLI support for management and debugging Full MIB support allows integration into existing management systems

20. Flexible Routing Tables Advanced routing tables for virtually any specialized network configuration No “Hard coded” limitations Allows flexible translation and number normalization –From and To E.164 numbering format into the PBX / key system and the PSTN

21. Flexible Routing Tables X In case of PBX 1 failure, the Mediant automatically uses alternative route to send the call to another Mediant at location #2, and through there, out to the PSTN via the local PBX at location #2 Regular calls from location #1 go out to the PSTN

22. Flexible Routing Tables X In case of IP/Mediation/OCS failure, the Mediant automatically uses alternative route to re-route the call back to PBX Regular calls from PSTN arrive to OCS user trough Mediant

23. Out-of-Box Configurability All parameters required to set up a network are web configurable using an intuitive GUI Gateways are shipped with specialized management screens for Microsoft Unified Communications, allowing quick and simple configuration* –Consolidates all the relevant parameters to step-by-step easy to follow and intuitive screens * Contact AudioCodes for availability

24. Perfect for Demo Rooms and traveling Demo Kits The Mediant 1000 is a perfect equipment for demo rooms enabling demonstration of all applicable interfaces including E1/T1, BRI, FXS and FXO in a single chassis The MediaPack FXS/FXO are ideal for “traveling sales man” kit for on- location demonstration of functionality

25. © 2007 AudioCodes Ltd. All rights reserved. Thank You For more information please visit www.audiocodes.com/microsoft