Cisco CP-7975G Administration Guide - Page 185

Chapter 7 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phone Status Menu Procedure for Creating a Test Tone Note When measuring echo, make sure you first set the input and output levels to 0 dB gain/attenuation on the trunk. This is set for the gateway (in Cisco Unified Communications Manager for MGCP) or under IOS CLI for H.323 or SIP. Step 1 Step 2 Step 3 Step 4 Place a call. Once the call is established, press the Help button twice, or press Settings > Status > Call Statistics. The Call Statistics screen and Tone softkey should appear. Press the Tone softkey. The phone generates a 1004 Hz tone at -15 dBm. For a good network connection, the tone sounds at the call destination only. For a bad network connection, the phone generating the tone may receive echo from the destination phone. To stop the tone, end the call. For information on interpreting the results of test tone for volume and echo, refer to the following document: http://www.cisco.com/en/US/docs/ios/solutions_docs/voip_solutions/EA_ISD.html OL-23092-01 Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.5 7-19