VoiceFinder AP-GS4500 is a new cutting edge Analog or IP to GSM gateway supporting maximum 64 ports of GSM Voice interface. GSM and analog/digital interface of AP-GS4500 provide an optimized call scenario when it interoperates with Legacy PBX. Compact cost effective design and system architecture of AP-GS4500 provides customer satisfaction in high quality, performance and system reliance. This product uses the state-of-art technology voice compressed algorithm and unique QoS algorithm of AddPac to maintain the maximum voice quality under fast internet line and slow internet line as well.

GSM and VoIP Gateway Service Both Support

AddPac AP-GS4500 is a device that can support both GSM gateway service (Digital E1/T1?GSM or Internet?GSM) and VoIP gateway service (Digital E1/T1?Internet) simultaneously. It also supports SIP, H.323 Multiple VoIP signaling protocol, various voice codec support(G.711, G.726, G.729, G723.1), eight(8) module slots for GSM and VoIP module, one(1) module slot for CPU board, two(2) gigabit ethernet ports, 1-port RS232C console, and state-of-art technologies and services.

Supports maximum 64 ports of GSM interface

GSM gateway combining IP-PBX (or Legacy PBX) is now suggesting a new model for a main voice communication solution. In order to be a part of advanced VoIP communications naturally in the future, making an excellent choice of choosing GSM gateway is essential. VoiceFinder AP-GS4500 is a mid-range GSM gateway providing total 64 GSM interface ports or 56 GSM interface ports + two(2) Digital E1/T1 port. It is suitable for general enterprises, medium and large public offices. It has functions as a media gateway which interoperates with IP-PBX or Legacy PBX. Especially AP-GS4500 provides an optimal solution of VoIP and GSM communications in telephony environments that using telephone lines and PBX to get connect with a head office.

Powerful networking protocols

VoiceFinder AP-GS4500 GSM VoIP Gateway supports two(1) 10/100/1000Mbps gigabit Ethernet Interface ports and provides stabilized leased line environment, ADSL environment, cable modem environment, fixed IP Address, supports all flow IP environment so that it can be selected in accordance with user environments.

Adapt to the Future Environment: Firmware Upgradeable Technology

Designed on programmable high performance RISC Integrated DSP Technology, AP-GS4500 is capable of adopting new capabilities and improvement by downloading firmware from website or with its auto-upgrade option as the customers' needs grow. Moreover, operators can download the latest protocol or service improvements as well as update firmware by checking the version and activating the auto-upgrade via AP-NMS (Network Management System) or AP-VPMS(VoIP Plug &Play Management System) system of AddPac Technologies.

Privacy function and Security function

AP-GS4500 not only supports network access control but it also provides solid service level security. By CID (Caller ID Detection), you can identify the phone number of callers before answering and simply block it.

AddPac IP Telephony Total Solution

AddPac technology is not just a vendor of GSM Gateway Box for the customer satisfaction, but it provides various products for appropriate network environment for VoIP, Media Gateway, audio/video terminals, audio/video MCU, IP audio/video broadcast, VoD solutions, network DVR solution, audio/video recording solutions, and traffic controller QoS device solutions. In the future, All IP based multimedia telephony environment, various audio/video resources should be shared on an IP Network; thus, the integration of solutions for each area and entire solutions are considered as top priority. AddPac IP telephony solution is designed to consider the integrated multimedia solution so that it can satisfy the various needs of customer.

AddPac’s various GSM, VoIP Gateway series and multimedia network devices have been fully recognized in terms of its performances and stability throughout the world. AP-GS4500, with our accumulated experiences and know-how in the enterprise and service provider markets, will provide full satisfactions for customers who ask for a next-generation GSM-Gateway.

Network Diagram

Overall Features
	High-performance VoIP Modular Architecture
	① AP-N1-GSM8 8-channel GSM interface (Antenna x 2, SIM Card, Internal 4 Channel Antenna Combiner x 2) ② AP-N1-FXS8 8-Port FXS Voice Processing Module (8 x RJ11) ③ AP-N1-FXO8 8-Port FXO Voice Processing Module (8 x RJ11) ④ AP-N1-2E1 2-Port Digital E1/T1 Voice Processing Module (2xRJ45)
	Supports maximum 64 port GSM interface
	Flash Memory: 512MB, DDR2 1GByte
	GSM voice interface module : 8-Port GSM Module
	Analog/Digital voice interface module: 8-Port FXS VoIP Module, 8-Port FXO VoIP Module, Digital 2 E1/T1 Voice Module
	Two(2) port 10/100/1000Mbps Gigabit Ethernet interface
	SIP, H.323 concurrent VoIP Signaling stack
	Support Voice Processing Features
	- VAD, DTMF,CNG,G.168, and T.38 G3 Fax Relay - G.723.1,G.729A,G.711 Voice Compressions
	High-performance IP-Routing Capability with Reliability
	Static and IEEE 802.1Q VLAN Routing Protocols including VRRP
	Traffic Queuing, and SNMP MIB v2 for Network Management Features
	Standard & Extended Access List for Security Functions
	Essential Scalability Features such as DHCP Server & Relay, NAT/PAT, IEEE Transparent Bridging,
	IP Accounting, and Debugging/Diagnostics, etc. - DNSProxy Support - UPnP Support - MAC Address Filter Service