Symbol Technologies AP-5131 - Manual (Page 150)

AP-5131 Access Point Product Reference Guide 5-26
3. Set the parameters in the Configuration field as required for the WLAN.
ESSID Enter the Extended Services Set Identification (ESSID) associated
with the WLAN. The WLAN name is auto-generated using the
ESSID until changed by the user. The maximum number of
characters that can be used for the ESSID is 32.