Yeastar GSM Module for S Series PBX

Expand your yeastar s-series pbx with gsm connectivity. the module allows direct mobile network access for making and receiving calls, sending sms, and ensuring communication continuity when landline or voip fails. ideal for backup, mobility, and cost-effective call routing. specifications: compatibility: yeastar s20, s50, s100, s300 pbx channel support: 1 gsm channel per module network: gsm 850/900/1800/1900 mhz (quad-band) sim card slot: standard sim (hot-swappable) features: voice calls, sms sending/receiving, call routing rules lan interface (via pbx): dual mbps ethernet ports (gigabit) use cases: gsm trunk backup, mobile connectivity, least-cost routing