This product is either discontinued or we cannot get that from suppliers.
CISCO Analog Voice VG204XM, DDR2 SDRAM, External, Connectivity Wired, VoIP Protocols H.323 v4, MGCP, SIP, SRTP, SCCP, RTP, Voice Codecs G.729a, T.38, G.711, Interface 1 x management, 1 x management - RJ-45, 4 x modem - RJ-11, 2 x 100Base-TX - RJ-45.
The Cisco VG350, VG224, VG204XM, and VG202XM are ideal for analog phone deployments ranging from centralized to sparsely concentrated or distributed topologies.