This product is either discontinued or we cannot get that from suppliers.
Standard SIP protocol, Ethernet 10M/100Mbps Self-adaptive, System Capacity: 250, Network Protocol TCP/IP, Working Temperature -10°C~+55°C
Dahua SIP server, Standard SIP protocol, Management of SIP clients as indoor monitor and SIP telephone, System capacity up to 200 SIP clients, Surface mounted, DC12V, Max 10W