Cisco Modular 24 FXS Port VoIP Gateway with PVDM3-64 | SIP Gateway — CON-SW-ASR9906N

Extend the life of analog voice infrastructure while moving core communications onto SIP. Cisco’s modular 24 FXS port gateway with PVDM3-64 is built for environments that still depend on analog handsets, fax devices, paging systems, or elevator phones, but need them to operate inside a modern IP telephony architecture. With 24 FXS ports, this platform supports multiple legacy endpoints from a single gateway, reducing the sprawl of smaller adapters and simplifying deployment planning. The PVDM3-64 DSP module adds the voice processing capacity required for enterprise telephony environments where call quality, transcoding, and session handling matter. For infrastructure teams, that means fewer compromises when integrating older analog services into a Cisco voice stack. This is the kind of gateway chosen when uptime, service continuity, and migration control matter more than lowest-cost hardware. It helps preserve existing investments, avoid disruptive endpoint replacement, and create a cleaner transition path for sites that cannot move all voice services to IP at once. Ideal For Connect analog desk phones into a SIP telephony deployment Support fax machines and paging systems during voice migration Maintain elevator or emergency analog lines in a managed voice environment Consolidate legacy endpoints at a branch site with limited rack space Why This Product 1 24 FXS ports support more analog endpoints than small adapter-based alternatives 2 PVDM3-64 adds DSP capacity for enterprise voice workloads 3 Modular design fits staged migration strategies 4 Cisco platform alignment simplifies voice infrastructure standardization