Data Sheet

Data Sheet
© 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 5 of 6
Security Features
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Password-protected system, preset to factory default
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Password-protected access to administrator and user-level features
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HTTPS with factory-installed client certificate
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HTTP digest: encrypted authentication via MD5 (RFC 1321)
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Up to 256-bit Advanced Encryption Standard (AES) encryption
Documentation
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Quick-Start Installation and Configuration Guide
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User Guide
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Administration Guide
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Provisioning Guide (for service providers only)
Package Contents
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Cisco SPA921 IP Phone, handset, and stand
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Handset cord
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5V power adapterc
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RJ-45 Ethernet cable
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Quick Installation Guide
Specifications
Table 1 gives specifications for the Cisco SPA921 1-Line IP Phone with Display.
Note: Many features are programmable within a defined range or list of options. Please see the
SPA Administration Guide for details. The target configuration profile is uploaded to the SPA921 at
the time of provisioning.
Table 1. Specifications for the Cisco SPA921 1-Line IP Phone with Display
Data networking
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MAC address (IEEE 802.3)
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IPv4 - Internet Protocol v4 (RFC 791)
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ARP - Address Resolution Protocol
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DNS - A record (RFC 1706), SRV record (RFC 2782)
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DHCP client - Dynamic Host Configuration Protocol (RFC 2131)
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ICMP - Internet Control Message Protocol (RFC 792)
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TCP - Transmission Control Protocol (RFC 793)
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UDP - User Datagram Protocol (RFC 768)
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RTP - Real Time Protocol (RFC 1889, 1890)
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RTCP - Real Time Control Protocol (RFC 1889)
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DiffServ - Differentiated Services (RFC 2475)
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ToS - Type of service (RFC 791, 1349)
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VLAN tagging 802.1p/Q - Layer 2 quality of service (QoS)
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SNTP - Simple Network Time Protocol (RFC 2030)