Audiocodes MP504/4S/SIP Audio codes MediaPack 504 analog VoIP gateway with 4 FXS Voice Interfaces content_copy

The Audiocodes MediaPack 504 is an analogue VoIP gateway developed specifically for integrating existing telephone and fax systems into IP-based communication networks. It serves as a bridge for businesses and service providers between analogue endpoints such as landline telephones, fax machines, or PBX systems and modern IP telephony networks, IP-PBX systems, and Unified Communications solutions. The device enables the conversion of analogue voice signals into digital IP data packets and vice versa, allowing existing telephone infrastructures to be connected with modern networks.

Applications
This gateway is particularly suitable for companies wishing to perform a gradual migration from analogue to IP-based communication systems. It is ideal for branch offices, small offices, or for connecting analogue endpoints to IP networks without completely replacing existing telephone systems. Support for SIP (Session Initiation Protocol) ensures broad compatibility with various IP telephony and UC platforms.

Functions and Features in Detail
The device features 4 FXS ports for connecting analogue endpoints such as telephones or fax machines. The FXS ports are equipped with integrated surge protection, ensuring protection of the devices against voltage surges in accordance with ITU-T K.21. This protection is especially important in environments with high electromagnetic interference or when directly connected to the public telephone network. The devices support a wide range of functions for end users, including 3-way conferencing with local mixing, call pickup, shared lines, call forwarding, call hold, and call transfer. These functions increase flexibility and user-friendliness in daily operation.

Technology Explained Simply
The gateway uses SRTP (Secure Real-time Transport Protocol) on all channels, ensuring encrypted voice transmission without impairing system capacity. This is crucial for communication security, especially in corporate environments where confidential conversations are transmitted. Comprehensive fax support includes the T.38 standard, enabling reliable fax transmission over IP networks without compromising quality or reliability. SIP header manipulation allows SIP messages to be modified during transmission, which is useful for adapting to specific network requirements or integrating into existing systems.

Compatibility and Accessories
The gateway is designed for use in IP telephony networks and offers SIP interoperability with leading vendors. It is therefore capable of communicating with various IP-PBX systems and Unified Communications solutions. The devices are designed for connection to networks with Gigabit Ethernet ports, featuring one LAN port and one WAN port. Power supply is provided via a single AC mains source. The devices are configured as MediaPack 504 chassis, enabling modular expansion if required.

Mounting and Installation
Installation typically takes place in a standard 19-inch rack, with the device featuring the appropriate mounting holes. Connection is made via the Ethernet ports to the local network (LAN) and to the WAN network. Configuration is performed via a web interface or CLI (Command Line Interface), with the exact procedure depending on the firmware used.

Operational Advantages
By combining analogue connections with IP network integration, the gateway offers a flexible and cost-efficient solution for companies wishing to continue using existing telephone systems. Support for SRTP and T.38 ensures secure and reliable communication, while integrated functions such as conferencing or call forwarding enhance the user experience. SIP interoperability ensures easy integration into existing IP telephony infrastructures.

General
Number of FXS ports	4
Over voltage protection	Integrated
Surge protection standard	ITU-T K.21
SRTP support	on all channels
Fax support	T.38
LAN port	1 Gigabit Ethernet
WAN port	1 Gigabit Ethernet
Current supply	AC
Product type	Gateway
SIP support
SIP header manipulation

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