Keep legacy voice endpoints connected while moving to SIP at your own pace. AudioCodes Mediant 500L with 4 FXS voice interfaces is designed for environments that still depend on analog phones, fax machines, or other FXS-based devices. It gives IT teams a practical path to modernize telephony without forcing a full rip-and-replace of working endpoints. This gateway is a strong fit for branch offices, small sites, and migration projects where continuity matters. Four FXS ports let you terminate analog devices directly, helping preserve existing investments while consolidating voice services onto an IP backbone. That makes it easier to standardize call control, simplify support, and phase upgrades in a controlled way. For organizations balancing uptime, budget, and operational risk, the Mediant 500L offers a focused answer: keep essential voice services available, extend the life of analog assets, and reduce the friction of moving to unified communications. It is the kind of infrastructure component that earns its place by solving a specific problem cleanly and reliably.