Troubleshooting; Display Information And Symptoms In The Vowifi Handset; No System; No Access - ASCOM i75 Configuration Manual

Configuration Manual
Ascom i75 VoWiFi Handset
11

Troubleshooting

11.1 Display Information and Symptoms in the VoWiFi Handset

11.1.1 "No system"

When the i75 shows "No system" it cannot find the wireless infrastructure with settings
matching those configured in the handset.
1 Check the ESSID. The ESSID configured in the handset must be identical to the
ESSID configured in the system infrastructure.
2 Check the security settings. The security settings i.e. authentication and encryption
must match the settings in the system infrastructure.
3 Check for 802.11d multi regulatory domain settings. The VoWiFi handset version
1.1.0 – 1.1.15 must be able to detect in which country it is located to use the
correct channel and transmit power settings. Later versions have a parameter
specifying if 802.11d should be used or not. This is provided by the infrastructure
according to the 802.11d standard.
4 Check which channels are used. The VoWiFi handset uses by default channel 1, 6
and 11. If the infrastructure is configured to use any other channel, change it to use
only 1, 6 and 11 as this is the recommended setting.
5 Check that the correct system (A, B, C or D) setting is selected.

11.1.2 "No access"

When the handset shows "No access" it has found and associated to the WLAN (a
wireless network with the configured ESSID and correct security settings). But it can
connect to neither the gatekeeper nor the messaging gateway (IMS/IP-WiFi).
1 Check if the handset has an IP address by entering the "System information"
screen. If not check the WEP key if used or WPA/WPA2 passphrase.
2 If using WEP double-check the key if the handset has no IP address. If you have a
wireless sniffer, configure it to the correct key and try to decode packets both from
and to the handset.
3 Check the Gateway address. Try to ping the gateway from another wireless client.
4 Check the IMS address. Try to ping the IMS from another wireless client.

11.1.3 "Voice only"

When the handset shows "Voice only" it is configured to use both a gatekeeper and an
IMS/IP-WiFi, but has lost contact with the IMS/IP-WiFi.
1 Check the IMS/IP-WiFi address. Try to ping the IMS from another wireless client.
2 Remove i75 handset from PDM stand alone programming device. When connected
to the PDM Windows version via USB, the handset cannot connect to the IMS and
may then show "Voice only".
3 If messaging is not used in the system, verify that the IMS address is configured to
0.0.0.0.
2008-11-20/ Ver. B
TD 92431GB
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