Genuine Original Cisco Small Business SPA504G 4 Line IP Phone with Display, PoE and PC Port Telephone with Stand and Power Supply Adapter 74-6648-02. The 504G integrates easily with the Cisco Smart Business Communications System, and your Cisco network can automatically recognize the Cisco SPA504G when it is plugged into your network, eliminating the cost and complexity of adding or moving phones.
Cisco Part Number: 74-6648-02
Cisco Model Number: SPA504G V01
Specifications:
| 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 (RFC793)
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 μ-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
Message waiting indicator (MWI) tones
VMWI via NOTIFY, SUBSCRIBE
Caller ID support (name and number)
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 |
| Body dimensions (W x H x D) | 8.42 x 8.35. x 1.73 in. (214 x 212 x 44 mm) |
| Operating temperature | 32º ~ 104ºF (0º ~ 40ºC) |
| Operating humidity | 5% to 95% noncondensing |
