User guide

Monitoring an AP-SM Link Installing Components
406
pmp-0229 (Mar 2013)
18. Click the Link Capacity Test tab.
NOTE: Use of this tool is described under Using the Link Capacity Test Tool (All)
on Page 533.
a. Perform several link tests of 10-second duration as follows:
b. Type into the Duration field how long (in seconds) the RF link should be tested.
c. Leave the Packet Length field (when present) set to the default of 1522 bytes or
type into that field the packet length at which you want the test conducted.
d. Leave the Number of Packets field set to 0 (to flood the link).
e. Click the Start Test button.
f. View the results of the test.
19. If these link tests fail to consistently show 90% or greater efficiency in 1X operation or 50
to 60% efficiency in 2X, troubleshoot the link, using the data as follows:
◦ If the downlink is consistently 90% efficient, but the uplink is only 40%, this indicates
trouble for the SM transmitting to the AP. Have link tests performed for nearby SMs.
If their results are similar, investigate a possible source of interference local at the
AP.
◦ If the uplink is consistently 90% efficient, but the downlink is only 40%, this indicates
trouble for the AP transmitting to the SM. Investigate a possible source of
interference near the SM.
If these link tests consistently show 90% or greater efficiency in 1X operation, or 50 to 60%
efficiency in 2X operation, in both uplink and downlink, continue this procedure.
20. In the left-side menu, select Configuration.
21. In the General tab, set the 2X Rate parameter to Enabled.
22. Click the Save Changes button.
23. If Prizm or another element management system will be used to manage the SM via
SNMP, perform the following steps:
a. Click the SNMP tab.
b. At the Read Permissions parameter, select Read/Write.
c. Under Site Information, type complete data into the three parameters: Site Name,
Site Contact, Site Location.
d. Click the Save Changes button.
24. Click the Reboot button.
NOTE: At 2X operation, received Jitter can be as great as 9 in a high-quality downlink,
but should be as low as your further aiming efforts can yield. If you need to re-aim, set
the SM back to 1X operation first.
Monitoring an AP-SM Link
After the SM installer has configured the link, either an operator in the network office or the SM installer in
the field (if read access to the AP is available to the installer) should perform the following procedure. Who
is authorized and able to do this may depend on local operator password policy, management VLAN setup,
and operational practices.