ASCOM I62 - 1.4 Software Version; 1.5 Abbreviations and Glossary

TD 92685EN
28 June 2012 / Ver. A
Troubleshooting Guide
Ascom i62 VoWiFi Handset
3.8.6 Troubleshooting Implications ....................................................................... 28
4. Factors Affecting RF Propagation
.............................................................................. 29
4.1 Jitter, Latency and Packet Loss
............................................................................. 29
4.1.1 Signal Loss
.................................................................................................... 29
4.2 Troubleshooting Methodology
.............................................................................. 30
4.3 Isolate Problem Areas
........................................................................................... 31
5. The VoWiFi Handset as a Troubleshooting Tool
....................................................... 33
5.1 Handset Device Information
.................................................................................. 33
5.2 Site Survey Tool
..................................................................................................... 33
5.2.1 Show RSSI
..................................................................................................... 33
5.2.2 Creating Heatmaps
...................................................................................... 34
5.2.3 Evaluate the Radio Environment
.................................................................. 34
5.2.4 Range Beep
................................................................................................... 35
5.2.5 Coverage and Roaming Test
......................................................................... 35
5.3 The Admin Menu
................................................................................................... 36
5.4 Handset Web Interface
......................................................................................... 36
5.4.1 Logs Tab
....................................................................................................... 36
5.4.2 Statistics Tab
................................................................................................ 36
5.4.3 Tools Tab
...................................................................................................... 38
5.4.4 Quality of Service (QoS) Test
........................................................................ 39
6. Troubleshooting Scenarios
......................................................................................... 40
6.1 SIP
.......................................................................................................................... 40
6.1.1 Attended Transfer Example
.......................................................................... 40
6.1.2 PBX Basic Call Analysis
.................................................................................. 44
6.1.3 Identifying Problems
.................................................................................... 46
6.1.4 Name Presentation Problems
...................................................................... 47
6.2 WLAN Troubleshooting Scenarios
......................................................................... 47
6.2.1 Voice Problems while Roaming
..................................................................... 47
7. VoWiFi Handset Problem Solving Scenarios
............................................................. 50
7.1 Handset Errors
....................................................................................................... 50
7.1.1 Startup Problems
.......................................................................................... 50
7.1.2 Errors Displayed on the Handset
................................................................. 50
7.1.3 No Access
...................................................................................................... 52
7.1.4 Messaging or Voice Only
............................................................................... 53
7.1.5 No Channel
.................................................................................................... 54
7.1.6 Battery Power is Low
.................................................................................... 54
7.1.7 Connected Call but No Sound or One-way Sound
......................................... 55
7.2 U-APSD Troubleshooting
....................................................................................... 55
7.2.1 Determining if the AP Supports U-APSD
...................................................... 55
7.2.2 Determining if Handset Signals its use of U-APSD
....................................... 56