SpectraLink h340 - Manual (Page 52)

SpectraLink Corporation Configuration and Administration—NetLink e340/h340/i640 Wireless Telephone
with SIP
PN: 72-1089-02-D.doc Page 52
11. Troubleshooting
On occasion, you may run into transmission problems due to any number of factors
originating from the wireless LAN. NetLink e340/h340/i640 Wireless Telephones
can exhibit transmission problems in several ways. They can cease functioning
properly, display error messages, or display incorrect data. When using and
troubleshooting handsets, consider the following problem sources to determine the
best method of approaching any specific situation.
11.1 Access Point Problems
Most, but not all, handset audio problems have to do with AP range, positioning,
and capacity. Performing a site survey as described in this document can isolate the
AP causing these types of problems. If the handset itself is suspected, conduct a
parallel site survey with a handset that is known to be properly functioning.
In range/out-of-range
Service will be disrupted if a user moves outside the area covered by the wireless
LAN APs. Service is restored if the user moves back within range. If a call drops
because a user moves out-of-range, the handset will recover the call if the user
moves back into range within a few seconds.
Capacity
In areas of heavy use, the call capacity of a particular AP may be filled. If this
happens, the user will hear three chirps from the handset. The user can wait until
another user terminates a call or move within range of another AP and try the call
again. If a user is on a call and moves into an area where capacity is full, the system
attempts to find another AP. Due to range limitations, this may be the same as
moving out of range.
Transmission obstructions
Prior to system installation, the best location for APs for optimum transmission
coverage should have been determined. However, small pockets of obstruction may
still be present, or obstructions may be introduced into the facility after system
installation. This loss of service can be restored by moving out of the obstructed area
or by adding/rearranging APs.
11.2 Configuration Problems
Certain problems are associated with improper configuration of either the SIP
system or the handset.
Configuration problems are generally corrected by changing the configuration on the
SIP system or on the handset. There may also be incorrect programming of the AP.
See the Configuration Note for the AP in use at the site.