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Affordable VoIP for Small Businesses
Additional features of the Cisco SPA921 IP Phone include:
- Easy station moves and shared line appearances across local and geographically dispersed locations
- Standard encryption protocols to provide secure remote provisioning and unobtrusive in-service software upgrades
- Detailed performance measurement and troubleshooting
Additional Documentation
User Guides, Release Notes, and Support Information
Download Firmware and Accept License Agreement for this Product
This product may include software code developed by third parties, which may include software code subject to the GNU General Public License ("GPL") or GNU Lesser General Public License ("LGPL"). As applicable, the terms of the GPL and LGPL, and information on obtaining access to any GPL Code and LGPL Code used in this product, are available to you on the Cisco Open Source License Notices page.
Product Literature

Q&A

(All Cisco Small Business IP Phones (Linksys Business Series) Q&A)

(All Cisco Small Business IP Phones (Linksys Business Series) Q&A)
Configuring an SPA9XX phone for voicemail service

Configuring Shared Line Extension on SPA9xx Series Phones

Determining if the Unit is Defective

Determining if the Unit is Defective

Experiencing Difficulties with the Voicemail Indicator

Explaining Dial Plan

Explaining Dial Plans

Explaining the Different Dial Plans

Getting to Know Dial Plans

Getting to Know Dial Plans Sequences

Identifying the Factors that Affect Voice Quality

Identifying the Factors that Affect Voice Quality

Initial configuration for SPA921

LCD Problem on SPA9XX Phone

Making calls from SPA921

Registering IP Phones and ATA Devices on the LAN and WAN Side

Resetting SPA2100

Resetting the IP Phone to Factory Default

Routing a call to PSTN

Running a Syslog on SPA Devices

Sample configuration of SPA921 to Online Service Provider

Setting up SPA9XX behind NAT

Setting up SPA9XX behind NAT and experiencing voice problem

Setting-Up Static IP Address on the IP Phone

SPA9xx Series Phone Experiencing Reboots.

Troubleshooting SPA Device: faq

Upgrading Firmware of SPA9xx Series Phone

Configuring Shared Line Extension on SPA9xx Series Phones
Determining if the Unit is Defective
Determining if the Unit is Defective
Experiencing Difficulties with the Voicemail Indicator
Explaining Dial Plan
Explaining Dial Plans
Explaining the Different Dial Plans
Getting to Know Dial Plans
Getting to Know Dial Plans Sequences
Identifying the Factors that Affect Voice Quality
Identifying the Factors that Affect Voice Quality
Initial configuration for SPA921
LCD Problem on SPA9XX Phone
Making calls from SPA921
Registering IP Phones and ATA Devices on the LAN and WAN Side
Resetting SPA2100
Resetting the IP Phone to Factory Default
Routing a call to PSTN
Running a Syslog on SPA Devices
Sample configuration of SPA921 to Online Service Provider
Setting up SPA9XX behind NAT
Setting up SPA9XX behind NAT and experiencing voice problem
Setting-Up Static IP Address on the IP Phone
SPA9xx Series Phone Experiencing Reboots.
Troubleshooting SPA Device: faq
Upgrading Firmware of SPA9xx Series Phone

