LINKSYS SIP VoIP Phone /SPA501G LINKSYS SIP VoIP Phone /SPA501G

Data networking
• MAC address (IEEE 802.3)
• IPv4 (RFC 791)
• Address Resolution Protocol (ARP)
• DNS: A record (RFC 1706), SRV record (RFC 2782)
• Dynamic Host Configuration Protocol (DHCP) client (RFC 2131)
• Internet Control Message Protocol (ICMP) (RFC 792)
• TCP (RFC 793)
• User Datagram Protocol (UDP) (RFC 768)
• Real-Time Transport Protocol (RTP) (RFC 1889, 1890)
• Real-Time Control Protocol (RTCP) (RFC 1889)
• Differentiated Services (DiffServ) (RFC 2475)
• Type of service (ToS) (RFC 791, 1349)
• VLAN tagging 802.1p/Q: Layer 2 quality of service (QoS)
• Simple Network Time Protocol (SNTP) (RFC 2030)
Voice gateway
• SIP version 2 (RFC 3261, 3262, 3263, 3264)
• SPCP with the Cisco Unified Communications 500 Series
• SIP proxy redundancy: dynamic via DNS SRV, A records
• Reregistration with primary SIP proxy server
• SIP support in NAT networks (including STUN)
• SIPFrag (RFC 3420)
• Secure (encrypted) calling via SRTP
• Codec name assignment
• Voice algorithms:
• G.711 (A-law and ?-law)
• G.726 (16/24/32/40 kbps)
• G.729 A
• G.722
• Dynamic payload support
• Adjustable audio frames per packet
• Dual-tone multifrequency (DTMF), in-band and out-of-band (RFC 2833) (SIP INFO)
• Flexible dial plan support with interdigit timers
• IP address/URI dialing support
• Call progress tone generation
• Jitter buffer: adaptive
• Frame loss concealment
• Comfort Noise Generation (CNG)
• Voice activity detection (VAD) with silence suppression
• Attenuation/gain adjustments
• VMWI - Voicemail waiting indicator, via NOTIFY, SUBSCRIBE
• Third-party call control (RFC 3725)
Provisioning, administration, and maintenance
• Integrated web server provides web-based administration and configuration
• Telephone keypad configuration via display menu/navigation
• Automated provisioning and upgrade via HTTPS, HTTP, TFTP
• Asynchronous notification of upgrade availability via NOTIFY
• Nonintrusive in-service upgrades
• Report generation and event logging
• Statistics transmitted in BYE message
• Syslog and debug server records: configurable per line
Power supply
• Power supply is optional and is purchased separately
• Models: Cisco PA100-NA, PA100-EU, PA100-UK, PA100-AU
• DC output voltage: +5 VDC at 2.0A maximum
• Switching power adapter: 100-240V 50-60 Hz AC input
Physical interfaces
• Two 10/100BASE-T RJ-45 Ethernet ports (IEEE 802.3)
• Handset: RJ-9 connector
• Built-in speakerphone and microphone
• Headset 2.5mm jack
Indicator lights/LEDs
• Speakerphone on/off button with LED
• Headset on/off button with LED
• Mute button with LED
• Message waiting LED
Body dimensions (W x H x D)
8.42 x 8.35. x 1.73 in. (214 x 212 x 44 mm)

Unit weight
2.00 lb ( 0.9 kg)

Operating temperature
32? ~ 104?F (0? ~ 40?C)

Storage temperature
-4? ~ 158?F (-20? ~ 70?C)

Operating humidity
5% to 95% noncondensing

Storage humidity
5% to 95% noncondensing