NMS AG2000: A powerful PCI analog telephone interface board card
NMS AG2000 is a powerful and universal PCI analog telephone interface board card series product launched by Natural MicroSystems (NMS), and it holds an important position in the field of telecommunication system development. NMS was founded in 1983 and has performed outstandingly in open, scalable computer telephony platforms and open communication technologies. It has participated in the formulation of multiple industry technical standards, and its technical strength has laid a solid foundation for the excellent performance of AG2000.
I. Hardware Design and Interface
The AG2000 adopts an advanced hardware architecture and is equipped with digital signal processor (DSP) resources, which endows it with outstanding capabilities in voice processing and other aspects. Its design fully takes into account the efficiency of resource utilization. For instance, the common design is 4-port 8-wire. Compared with the traditional 4-interface voice card, it greatly saves precious PCI slot resources. For large-scale systems that need to deploy multiple boards, it can effectively reduce hardware costs and space occupation.

In terms of interface types, AG2000 is highly flexible and can configure LoopStart (LS), Subscriber Loop (SL), Direct Inward Dialing (DID), and E&M interface modules. This rich interface configuration enables it to support the requirements of almost all analog telephone interfaces. Whether it is the access of ordinary analog telephones or the connection of more complex dedicated communication equipment, it can handle it with ease and can be widely applied in various telecommunication system scenarios.
Ii. Functional Characteristics

Interactive Voice Response (IVR) function: With the on-board DSP resources, the AG2000 can efficiently implement the interactive voice response function. In practical applications, such as in a call center system, after a user dials a hotline, the AG2000 can guide the user to perform operations through voice prompts according to the preset program, such as pressing keys to select service types or query information. Its full-duplex and playback recording synchronization function supports the activation of the instant session interrupt (Barge in) function, allowing callers to interrupt at any time without having to listen to all the playback content, greatly enhancing the user experience. Meanwhile, the echo cancellation function integrated on the board further enhances voice quality, reduces echo interference during calls, and ensures clear voice interaction.
Fax function support: For fax services, the AG2000 also provides stable and reliable support. Whether sending or receiving faxes, the integrity and clarity of the fax content can be guaranteed. In some enterprise office scenarios, by connecting fax machines and other devices through the AG2000, efficient fax communication can be achieved. Compared with traditional fax methods, with its digital processing capabilities, it can better handle issues such as error correction and format conversion during the fax process.
IP telephony function: In terms of IP telephony applications, the AG2000 can serve as a key component to build high-performance IP telephony systems. It can convert analog voice signals into digital signals and transmit them through IP networks, enabling communication with other IP telephony devices or systems. This function holds significant value when upgrading the internal communication network of enterprises and building a converged communication system. It can effectively reduce the cost of long-distance communication while ensuring the quality of voice communication.
Iii. Application Scenarios
Call center: In the field of call centers, AG2000 plays a core role. Its rich interfaces can be connected to numerous analog telephone devices, meeting the access requirements of a large number of agents. The IVR function can automatically handle common inquiries, rationally allocate call tasks, and improve the working efficiency of the call center. Meanwhile, excellent voice processing capabilities ensure clear and smooth communication between customers and agents, enhancing customer satisfaction.
Telecom operator value-added service platform: Telecom operators can utilize AG2000 to develop various value-added services. For example, based on its fax function, an electronic fax service is developed, allowing users to send and receive faxes via the network. By leveraging the interactive voice response function, services such as voice navigation and voice information query are launched to enrich the variety of services and enhance user stickiness.
Enterprise communication system: In the internal communication system of an enterprise, AG2000 can be used to build a converged communication platform. By integrating traditional analog telephones with IP telephony systems, enterprise employees can not only use the existing analog telephone equipment but also enjoy the convenience and low-cost communication advantages brought by IP telephony. In addition, the fax function it provides can also meet the file transmission needs in the daily office work of enterprises.
Iv. Installation and Driver Configuration
When installing the AG2000, it needs to be correctly inserted into the PCI slot of the computer. In terms of software, it is recommended to use the Windows 2000 system (of course, other systems such as Windows NT and Solaris are also supported), and install the NMS voice card driver. Version V4.2 is a more commonly used choice. After installing the driver, you also need to set up the configuration file. In the NMS\OAM\CFG directory under the driver directory, find the oamsys.cfg file and open it as text. Among them, parameters such as “Number”, “Bus”, and “Slot” can be obtained through the PCISCAN.EXE tool, while the “File” parameter needs to be modified accordingly based on the actual board card type. For example, AG2000 might correspond to a4pimfc.cfg, etc. After saving the configuration, restart the machine, and the basic installation and configuration process will be completed.

NMS AG2000, with its outstanding hardware design, rich functional features and wide adaptability to application scenarios, has become an important choice for building high-performance telecommunication systems. Whether in the traditional telecommunications field or under the emerging trend of converged communication, it has demonstrated strong vitality and application value.