Grandstream 4‑Port FXS Gateway – Seamlessly connect up to four analog phones or fax machines to any SIP‑based VoIP network with high‑quality codecs, easy web‑based setup, and secure TLS/SRTP encryption. Compact yet powerful, it supports G.711/G.729 codecs, T.38 FoIP, and secure TLS/SRTP encryption for crystal‑clear voice and reliable fax services. An intuitive web GUI and SNMP monitoring simplify provisioning and management. Advanced QoS, flexible dial plans, and detailed CDR logging optimize call control and reduce telecom costs—ideal for branch offices.