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SpectraLink Corporation Setup and Administration—NetLink e340/i640 Wireless Telephone
Mitel Networks ICP and 5220 IP Phone emulation
PN: 72-1084-02-B.doc Page 35
11. Troubleshooting Wireless Telephone
Problems
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 Wireless Telephones, consider the following problem sources to
determine the best method of approaching any specific situation.
11.1 Access Point Problems
Most, but not all, Wireless Telephone audio problems have to do with access point range,
positioning and capacity. Performing a Site Survey as described in Section 9.2 can isolate
the AP causing these types of problems. If the Wireless Telephone itself is suspected,
conduct a parallel Site Survey with a Wireless Telephone 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 access points. Service is restored if the user moves
back within range. If a call drops because a user moves out of range, the Wireless
Telephone 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 Wireless Telephone.
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 was 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 APs.
11.2 Configuration Problems
Certain problems are associated with improper configuration of either the supported
Mitel Networks VoIP solution or the Wireless Telephone.
Configuration problems are generally corrected by changing the configuration at the
supported Mitel Networks VoIP solution or on the Wireless Telephone. There may also
be incorrect programming of the AP. See the Configuration Note for the AP in use at the
site.