Spectralink 84-Series Series Wireless Telephones Administration Guide
1725-86984-000_P.docx
September 2016
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Is the problem related to one area of the facility?
Check SIP server settings which may be applicable to the audio or echo issues.
See Technical Bulletin
Troubleshooting Audio and Echo Issues
There is choppy/poor audio
Poor audio can be caused by several things including:
Inadequate RSSI (RF Signaling from the AP)
High retry rates
High Missed packet rates
High Dropped packet rates
High Late packet rates
Loss of connection to the WLAN
Long roam times between APs
Congestion on the network between the 84-Series handset, SIP server or other end point
Additionally…
Logging data is useful for later syslog data analysis with render =1 and WLAN = 1 along with
Call start and end times and symptom descriptions at the logging level for WLAN at 2.
Another troubleshooting technique is to use Diagnostics mode to check for many of the above
items during the call. Go to
Settings> Status> Diagnostics> WiFi Stats>
[1/6] Packet Count to see Missed RX, Missed TX packets, RX Retry count and TX Retry
count. This screen shows cumulative packet counts not percentage. If any of these
counters are incrementing frequently it is a bad sign.
[2/6] General Information shows SSID, Last TX rate and TX power
[3/6] AP List shows last few bytes of the AP MAC, channel and RSSI (a lower number (-
45 versus -75 is a stronger signal)
[4/6] Re/Association Count shows Association count, Reassociation count, Association
fail count and Reassociation fail count
[5/6] Security shows MIC Err Count, MIC Err Last Seq , ICV Err Count and QoS Fail
Count
6[6/6] EAP Information shows EAP Err Count, Last EAP Err Code and 802.11n disabled
When in call, focus on screens1 and 3 to see how packet counts seem to be affected by low
(inadequate) RSSI
Upgrading Issues
Tip: Important!
When upgrading handset software using the Web Configuration Utility, the handset
is unable to connect to the Spectralink Hosted Server.
Occasionally, the handset is unable to connect to the Spectralink Hosted Server because: