Hanwha, SIP Microphone, Frequency : 100Hz ~ 6kHz, Protocol: IPv4, HTTP, HTTPS, SIP, mDNS, DNS, NTP, TCP, UDP, DHCP, ARP, ICMP. PoE (IEEE 802.3 af type 1 Class 3), Max.12W, DC24V, 10/100 Base-T

Tested with SIP clients such as Grandstream, Yealink, Cisco, MicroSIP softphone and PBX suppliersuch as Asterisk. Tested with SIP client such as Grandstream and PBX supplier such as Grandstream. Supported SIP features: DTMF (RFC2833). Supported codecs: PCMU, PCMA, speex/8000, speex/16000