Experiencing Choppy Line when Using SPA400 [Cisco Small Business Voice Systems]

Document ID: 108743

Updated: Dec 12, 2008

Introduction
What can I do if I'm experiencing choppy/one way audio when I call PSTN using the SPA400?
Related Information

Introduction

This article is one in a series to assist in the setup, troubleshooting, and maintenance of Cisco Small Business products.

Q. What can I do if I'm experiencing choppy/one way audio when I call PSTN using the SPA400?

Experiencing Choppy Line when Using SPA400

Step 1:
Access the SPA3102's web-based setup page. For instructions, click here.
Step 2:
When the SPA3102's web-based setup page appears, click Voice.
Step 3:
Under Preferred Coder, select G.711U.
Step 4:
Under Voice Coder, set all VAD to ON.
Step 5:

Click .
Step 6:
Perform a power cycle.

Note: It will also be helpful if you set the SPA400 on the WAN side of the SPA9000 and make sure that Proxy Network Interface is set to WAN. This can be found under the SIP tab of the SPA9000.