NEC MH110, Руководство администратора

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MH110/MH120 IP Wireless Telephone Setup and Administration Guide - Revision 1
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Troubleshooting Mobile Handset
Problems
MH110/MH120 UNIVERGE WL Mobile Handsets can exhibit transmission
problems in several ways. They can cease functioning properly, display
error messages, or display incorrect data. This chapter discusses
problem sources that determine the best method of approaching any
specific situation when using and troubleshooting Mobile Handsets.
Chapter Topics
• Access Point Problems
• Configuration Problems
• Mobile Handset Status Messages
Access Point Problems
Most, but not all, Mobile Handset audio problems have to do with access
point range, positioning and capacity. Performing a Site Survey as
described in “Site Survey Mode” on page 9-2 can isolate the AP causing
these types of problems. If the Mobile Handset itself is suspected,
conduct a parallel Site Survey with a Mobile 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 access points. Service is
restored if the user moves back within range. If a call drops because a
user moves out of range, the Mobile 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
Mobile 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.