Cisco SPA525G Manual page 5

● Supplementary services feature activation codes
● Supplementary services announcements codes
● Configurable supplementary services soft keys
● Individual volume setting per each audio path (headset/handset/speaker)
**Feature requires support by SIP/SPCP client management server.

Signaling protocol support ● Smart Phone Control Protocol (SPCP)
● SIP version 2

Voice features
● SIP proxy redundancy-dynamic via DNS SRV, A records
● Reregistration with primary SIP proxy server
● SIP support in network address translation (NAT) networks
● Codec name assignment
● Voice algorithms
o G.711 (A-law and μ-law)
o G.726 (32 kbps)
o G.729 AB
o G.722, Wideband Audio
●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/Uniform Resource Identifier (URI) dialing support
● Call progress tone generation
● Jitter buffer-adaptive
● Frame loss concealment
● Voice activity detection (VAD) with silence suppression
● Attenuation/gain adjustments
● VMWI via NOTIFY, SUBSCRIBE
● Caller ID support (name and number)

Data features
● MAC address (IEEE 802.3)
● Address Resolution Protocol (ARP)
● DNS A record (RFC 1706), SRV record (RFC 2782)
● Dynamic Host Configuration Protocol (DHCP) client (RFC 2131)
● Point-to-Point Protocol over Ethernet (PPoE) client (RFC 2516)
● Internet Control Message Protocol (ICMP) (RFC 792)
● TCP (RFC 793)
● User Datagram Protocol (UDP) (RFC 768)
● Real Time 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
● Simple Network Time Protocol (SNTP) (RFC 2030)

Security
● Password-protected system reset to factory default