TD 92685EN
28 June 2012 / Ver. A
Troubleshooting Guide
Ascom i62 VoWiFi Handset
48
6. Troubleshooting
1 Using the shortcut *#34# open the handset Device Information menu and select
Software. Note the value of the SW version parameter.
2Obtain the Application P
artner Program, Ascom Inter-Operability Reports for vendor
equipment from the Ascom Partner web site.
Analyze Result
3 Check that the WLAN and handset have com
patible software versions and are
configured according to Ascom interoperability report. Are incorrect configurations or
software version incompatibilities found?
Yes: Perform a system
upgrade or open the PDM to reconfigure parameters,
No: Go to the section Coverage.
Coverage
Check the RF coverage with the built in Site Survey tool:
4 Using the shortcut *#76# activate
the RSSI screen
5 In idle mode, slowly walk around the site, noting th
e RSSI at frequent intervals.
6 Repeat the procedure in step2 in call mode.
Analyze Result
7 The signal strength should not fall much below -
70dBm. Does the signal strength fall
below -80dBm?
Yes: There are
coverage gaps that may explain the problem the customer is
experiencing.
No: Go to the section Roaming.
Roaming
Check if audio problems are present while m
oving through the site in call mode:
8 Make a call to another party and move throu
gh the site while holding a conversation
with the other party.
9 During a call, with the RSSI screen activated, m
onitor the RSSI value and see if the
audio problem is experienced during the handset roam.
Analyze Results
10 Are audio problems experienced?
Yes: Go to step 14.
No: Investi
gate possible problems caused by incorrect QoS settings, RF access
problems and internal interference described in steps 11 to 13.
QoS
11 Control QoS in the handset Syslog and confirm that both
Rx and Tx have UP 6, if not
QoS needs to be corrected in the LAN/WLAN. For additional information, see section
Figure 14. Traceroute Result on
page 39.
RF Access
12 Is CAC or TSpec implemented?
No: Go to st
ep 13.
Yes: Go to step 17.
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