Yeastar 1 FXS + 1 FXO Port Module Central Expansion Module to connect an analog phone or fax and PSTN line to Yeastar IP PBX systems, easy installation, high sound quality, and full integration with central features

The Yeastar 1 FXS + 1 FXO Port Module is a flexible expansion card designed for Yeastar IP PBX systems, combining one FXS and one FXO port to connect one analog phone and one PSTN landline together. The Yeastar allows calls to be made and received over the landline, with the ability to distribute them to the analog or IP phones connected to it.

The Yeastar extension provides full support for professional features such as IVR, call forwarding and recording, and queues, and features easy Plug & Play installation within compatible Yeastar devices, making it easy to set up and manage without technical complexity.

It also provides stable sound quality and reliable performance for daily use in different work environments.

This model is an ideal choice for small and medium-sized offices, clinics, stores, and branches that want to gradually transition to VoIP while continuing to use traditional telephony architecture.

Integration with other systems and Yeastar 1 FXS + 1 FXO Port Module

The Yeastar SO Module is a compact hybrid model designed specifically for Yeastar s-series (S20, S50, S100, S300, S412) and p-series (P520, P550, P560, P570) switches, with a unique PSTN Fallback feature that allows calls to be made and received directly over the analog line even during a system power outage.

Supports SIP/IAX2 protocols, G.711, G.729, G.168 echo cancellation, Jitter Buffer, DTMF (RFC2833/In-band), Caller ID (DTMF/FSK), ring detection (15-50 Hz), and interruption methods (Busy Tone, Polarity Reversal), with advanced TLS/SRTP and QoS security.

The Yeastar 1 FXS + 1 FXO Port Module serves as an economical solution for SMBs that need a balance of analog inbound and outbound communications within a VoIP environment, is compatible with Asterisk and other PBX systems, and reduces costs by maintaining existing POTS lines while migrating to IP.