Cisco Cisco 5520 Wireless Controller 기술 참조

The DAS vendor and systems integrator are solely responsible for the support of the DAS products, 
adequate RF coverage, and any RF-related issues. This support includes, but is not exclusive to, location 
accuracy, RF coverage, roaming issues related to RF, multipath issues, and scalability.

The DAS vendor and systems integrator are also responsible for understanding that the deployed DAS 
system meets the requirements of all of the customer Wi-Fi devices and applications over the DAS 
system; this statement includes, but is not exclusive to, all Voice over WLAN (VoWLAN) and medical 
devices.

While Cisco Technical Assistance Center (TAC) and Cisco field teams do not provide support for RF 
issues that arise in a Cisco WLAN used over a DAS, they do provide support for non-RF related issues 
in Cisco products according to the customer support agreement with Cisco Systems.

For more information, see the following URL:

Elevator coverage can sometimes be accomplished by placing APs in the near field of the elevator, 
typically on each floor near the elevator door. Since elevators often have metal doors, and the shafts are 
often concrete or contain other materials that degrade Wi-Fi coverage, it is important to check the 
coverage inside the elevator. Elevator coverage can be a challenge, but it is often possible, especially if 
the elevator only serves a few floors.

In high rise elevators, roaming issues are more problematic because the client cycles through a large 
number of APs rather quickly. Some companies put a patch antenna on the floor inside the shaft and a 
patch antenna on the bottom of the elevator car, while other companies use leaky coaxial cable along the 
side of the shaft.

When installing any Wi-Fi equipment inside elevator cars or shafts, follow local regulations. Some 
installations may be prohibited because of safety reasons, while other installations may be prohibited by 
the building owner or local fire department. Only elevator repair persons or experienced contractors 
should perform this type of work.

The following dual-band, dual-resonant antennas are available for use with the AP 1600e*/2600e and 
the AP 3600e:

AIR-ANT2524DB-R – Dual-band (Black) dipole (4 required) – 2/4 dBi Dipole

AIR-ANT2524DW-R – Dual-band (White) dipole (4 required) – 2/4 dBi Dipole

AIR-ANT2524DG-R – Dual-band (Grey) dipole (4 required) – 2/4 dBi Dipole

AIR-ANT2524V4C-R – Dual-band Omni-directional (1 required) – 2/4 dBi Ceiling mount Omni use

AIR-ANT2544V4M-R – Dual-band Omni-directional (1 required) – 4/4 dBi Wall mount Omni use

AIR-ANT2566P4W-R – Dual band directional (1 required) – 6 dBi Patch wall mount use