Cisco aironet 2800 series Deployment Manual page 52

AP 3800 and Multigigabit Ethernet (mGig)
Ideally a switch supporting IEEE 802.3bz (mGig, which is also referred to as N-BASET) will deliver the
fastest Ethernet using older cable systems such as CAT-5 and deliver +30W for newer PoE devices.
Figure 50: Cisco Multigigabit enables speeds over 1G on conventional CAT5e cable systems
In regards to cabling structure and Cisco Multigigabit Ethernet:
1 Data rates up to 1G requires 62.5–MHz bandwidth (Cat 5e is 100 MHz)
2 Data rates up to 2.5G requires 100MHz bandwidth (Cat 5e is 100 MHz)
3 Data rates up to 5G requires 200MHz bandwidth, which is more than the specified Cat 5e 100MHz
bandwidth, but within the Cat 6 cable
The main point is that 5G operations over Cat 5e may have issues using certain cable configurations due to
the fact we are using Cat 5e cable beyond the specification.
Figure 51: Cisco Multigigabit cable support at rates up to 5G
Cisco Aironet Series 2800/3800 Access Point Deployment Guide
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