The 1142 doesn't have any external antennas not does it have antenna cables. So as far as distance or better yet coverage, a site survey can only tell you. Walls, windows, materials all have affect on propagation. ALS your requirement as far as minimum required signal and or snr also is a factor on how far the signal is usable per your requirement.
I second Scott's post. If you are sitting in the middle of a wide-open field and you have enabled all data rates, you should be able to get 802.11b to about 40 metres in a single direction (not radius).
Be aware that the only way to be certain is to get a wireless site survey.
Transferring Crash file from standby: Login to the Active WLC in HA.
From CLI: (Cisco Controller) >transfer upload datatype crash (Cisco
Controller) >transfer upload filename (Cisco
Controller) >transfer upload mode tftp (Cisco Controller) >transfer
This is the start of a display filter cross reference between Wireshark
and OmniPeek. The 1st installment is a table of advanced filters. More
filters will be added as time allows. It is a living doc, so check back
for changes every so often Please feel f...