Zycoo GSM Module 1 Trunk for U20 — VoIP Solution for SMS & Voice

The Zycoo 1 GSM Trunk Module for U20 is a quad-band GSM/GPRS extension module for Zycoo U20 series IP PBX systems, enabling VoIP infrastructure to connect to mobile networks via a standard SIM card. It is used in small and medium businesses that need GSM trunking for voice calls, SMS, and data without dependency on fixed telephone lines.

The module is built around the SIM900 chipset — a complete GSM/GPRS solution in a 24 × 24 × 3 mm SMT package — with quad-band support across 850/900/1800/1900 MHz frequencies, covering GSM networks in all major global regions. The low power consumption and compact dimensions of the SIM900 module ensure seamless integration into the Zycoo U20 chassis without additional hardware modifications. Simultaneous support for voice, SMS, data, and fax covers the typical business communication scenarios for an inbound and outbound GSM trunk.

The module installs directly into the dedicated slot of the Zycoo U20 PBX, extending its capabilities with an active GSM channel for mobile calls. Quad-band compatibility removes frequency restrictions in international deployments or in networks with multiple operators. SMS functionality enables notification automation and text communications integrated into business workflows managed by the IP PBX.

Recommended for small and medium businesses running Zycoo U20 PBX systems that need a GSM trunk for mobile calls at reduced cost, for offices in areas without adequate PSTN coverage where GSM connectivity is the primary alternative, and for VoIP system integrators delivering IP telephony solutions with mobile network fallback or trunking capabilities.