TERBATAS Sip Phone Cisco Linksys SPA942 PoE 4-Line IP Telpon 2-Port

Up to 4 lines with independent configuration Dual switched Ethernet ports Multiple ringtones with selectable default ring tone per line Personal address book with auto dial- 100 entries Speed dialling Hands free option 128x64 Monochrome LCD graphical display with back light Automated provisioning- up to 256 byte encryption TFTP HTTP HTTPS Data Networking MAC Address (IEEE 802.3) IPv4- Internet Protocol Version 4 (RFC 791) ICMP- Internet Control Message Protocol (RFC 792) TCP- Transmission Control Protocol (RFC 793) UDP- User Datagram Protocol (RFC 768) RTP- Real Time Protocol (RFC 1889) (RFC 1890) RTCP- Real Time Control Protocol (RFC 1889) DiffServ (RFC 2475) Type of Service- TOS (RFC 791/1349) VLAN Tagging 802.1p/q - Layer 2 Qos SNTP- Simple Network Time Protocol (RFC 2030) ARP- Address Resolution Protocol DNS- A Record (RFC 1706) SRV Record (RFC 2782) Voice Over IP SIPv2- Session Initiation Protocol Version 2 (RFC 3261, 3262, 3263, 3264) SIP Proxy Redundancy- Dynamic via DNS SRV, A records Re-registration with Primary SIP Proxy Server SIP Support in Network Address Translation Networks- NAT (incl. STUN) SIPFrag (RFC 3420) Codec Name Assignment Voice Algorithms G.711 (A-law and mu-law) G.726 (16/24/32/40 kbps) G.729 A G.723.1 (6.3 kbps, 5.3 kbps) Jitter Buffer- Adaptive Frame Loss Concealment VAD- Voice Activity Detection w/ Silence Suppression Attenuation/Gain Adjustments MWI- Message Waiting Indicator Tones VMWI- Voice Mail Waiting Indicator Dynamic Payload Support Adjustable Audio