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Grandstream GXW4248 Features and Functions: 48 telephone FXS ports with both RJ11 and 50-pin Telco connectors, as well as per port LED Gigabit Ethernet and a backlit 128x32 graphic LCD display with support for multiple languages 2 SIP server profiles per system and independent SIP account per port Supported voice/ fax codecs include G.711, G.723.1, G.726, G.729A/ B, iLBC, T.38 Fax Advanced carrier grade 128ms-tail-length line echo cancellation Over-voltage and over-current protection ( ITU-T K.21 Basic Test Level) Support VMWI, NEON LED and stutter tone for message waiting indication Automated provisioning using TR-069 or AES encrypted XML configuration file; TLS/ SRTP/ HTTPS for advanced security and privacy protection. Konsultasi Gratis : Hubungi 021-55780000