Cisco Cisco Aironet 3500p Access Point 信息指南
When considering the new FCC rules, RF output power is rolled back a bit when all four
transmitters are used concurrently to comply with the lowered PSD limitations. A worst case
power reduction, for example, a 6 Mbps packet can have up to 6 dB less power with an AP
3600 than the AP 3500 (8 dB versus 14 dB) because the AP 3600 now complies with the new
FCC rules about PSD emissions and the two additional transmitters.
transmitters are used concurrently to comply with the lowered PSD limitations. A worst case
power reduction, for example, a 6 Mbps packet can have up to 6 dB less power with an AP
3600 than the AP 3500 (8 dB versus 14 dB) because the AP 3600 now complies with the new
FCC rules about PSD emissions and the two additional transmitters.
In most cases, especially with clients using higher data rates, the reduced TX power is
compensated by having a better downlink performance due to the gains from beam−forming
now enabled with multiple transmitters and using Cisco Client Link 2.0.
compensated by having a better downlink performance due to the gains from beam−forming
now enabled with multiple transmitters and using Cisco Client Link 2.0.
Note: Client Link 2.0 is only available on the AP 3600. Therefore, it has an advantage over
the AP 3500 allowing 802.11n and 802.11ac clients to maintain a better downstream link.
the AP 3500 allowing 802.11n and 802.11ac clients to maintain a better downstream link.
Also, while there has been a noticeable reduction in RF power primarily in the UNII−1 band,
and while it is possible to perhaps characterize better performance with an AP 3500 running
at maximum RF power in the UNII−1 band, testing has indicated the AP 3600 when installed
in an over−all network employing multiple APs across channels in the UNII−1, 2 and 3 bands
the performance of the AP 3600 exceeds AP 3500 performance by far.
and while it is possible to perhaps characterize better performance with an AP 3500 running
at maximum RF power in the UNII−1 band, testing has indicated the AP 3600 when installed
in an over−all network employing multiple APs across channels in the UNII−1, 2 and 3 bands
the performance of the AP 3600 exceeds AP 3500 performance by far.
Again, the AP 3500 only has the ability to beam−form to legacy 802.11a/g clients, whereas
the newer AP 3600 using Client Link 2.0 can beam−form to 802.11a, g, and n clients as well
as 802.11ac clients in compatibility mode.
the newer AP 3600 using Client Link 2.0 can beam−form to 802.11a, g, and n clients as well
as 802.11ac clients in compatibility mode.
In summary, the AP 3600 is the first industry Access Point that fully complies with all the
new FCC rules and regulations. Also, the AP 3600 offers many features above and beyond
those in the AP 3500.
new FCC rules and regulations. Also, the AP 3600 offers many features above and beyond
those in the AP 3500.
Additionally, any new multi−transmitter MIMO devices, including those by other vendors,
now need to comply with these new FCC rules.
now need to comply with these new FCC rules.
Features include:
Support for four transmitter chains, which enables 3−ss client support up to 450
Mbps.
Mbps.
♦
Client Link 2.0 (Beam−forming) for all 802.11n clients for a better overall Bring
Your Own Device (BYOD) experience.
Your Own Device (BYOD) experience.
Note: The 4th transmitter allows Client Link to work with 3−ss clients.
♦
Module support for expandability and investment protection.
♦
Cisco APs have full support of UNII−2 extended channels, a key feature for the
newer clients because more clients are emerging with UNII−2 extended support
including .11ac clients in enterprise (802.11n) compatibility mode.
newer clients because more clients are emerging with UNII−2 extended support
including .11ac clients in enterprise (802.11n) compatibility mode.
♦