Linksys 921 User Manual

IP Phone - Linksys 921
Installation, Set-up and User Guide

May 2008

1

Installation

Phone will arrive via FedEx after placing order from your online account.

The phone is pre-provisioned

at our shipping office. Installation is easy:

1. Plug long straightened end of the
coiled phone cord into back of phone.
Plug short straightened end into the
handset (not shown).

2. Plug power cord into phone (only use
power supply that came in the box).

3. Plug Cat 5 Ethernet cable into the
phone, connected to your network.
Phone now has dial-tone and is ready

2

PC port not
available

3

for use!

Note: The handset cord is tucked behind the cardboard insert on the front

side of the box. You have to dig in to find it!

1

2

Installation

Firewall Ports to Open:

IP Phones/ATA Adapters need port 5060 UDP and the range of 16384­16482 UDP inbound and outbound open.

In some cases, multiple IP Phones/ATA Adapters on the same
network/router will need to change the 5060

port number to another
available port [examples: 5062, 5064, 5090…). This will mainly happen
with older routers, but some newer models may still be affected as well
and require a different port for each IP Phone/ATA Adapter.

3

Installation

Tip for Best Voice Quality:

A good internet connection is needed to maintain good voice quality.
We recommend a high speed DSL, cable or fiber connection with an
upload speed of 90kbps

or greater.

We provision DigitalLine service at the "High/ Automatic" bandwidth
setting for better sound quality. If your broadband connection speed is
less than 90kbps (and you experience choppy voice quality),
you should adjust the bandwidth setting to "Low." To change phone’s
bandwidth connection, log into your online account, click Preferences,
then DigitalLines. Click the View

link associated with the phone and

change the “Bandwidth Usage” setting.

To test your PC’s speed, visit

http://www.voipreview.org/voipspeedtester.aspx

Click the button in your online account for the User Guide and
additional help on this RingCentral product.

4

Set-Up

After installation, the phone will be automatically listed in the
assigned extension’s Forwarded Numbers list.

Check the Active box and inbound calls will ring on this device.

[phone]

5

Set-Up

To change phone’s name, extension assignment, or
other provisioning actions, log into your online account,
click Preferences, then DigitalLines. Click the View

[phone]

link:

[phone]

6