Poe+ And Cisco Upoe Port Connections - Cisco Catalyst 3850 Hardware Installation Manual
Catalyst 3850 series switch
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Connecting Devices to the Ethernet Ports
Table 2-2
Device
Switch to switch
Switch to hub
Switch to computer or server
Switch to router
Switch to IP phone
1. 100BASE-TX and 1000BASE-T traffic requires twisted four-pair, Category 5, Category 5e, or
PoE+ and Cisco UPOE Port Connections
The 10/100/1000 PoE+ and Cisco UPOE ports have the same autonegotiation settings and cabling
requirements that are described in the
These ports can provide PoE, PoE+, or Cisco UPOE inline power.
PoE inline power supports devices compliant with the IEEE 802.3af standard, as well as prestandard
Cisco IP Phones and Cisco Aironet Access Points. Each port can deliver up to 15.4 W of PoE.
PoE+ inline power supports devices compliant with the IEEE 802.3at standard, by delivering up to 30 W
of PoE+ power per port to all switch ports.
See
UPOE on 24- and 48-port switches.
For more information about the required power-supply module and the PoE specifications, see the
"Power Supply Modules" section on page 1-18
Note
Many legacy powered devices, including older Cisco IP phones and access points that do not fully
support IEEE 802.3af, might not support PoE when connected to the switches by a crossover cable.
PoE faults are caused when noncompliant cabling or powered devices are connected to a PoE port. Use
Caution
only standard-compliant cabling to connect Cisco prestandard IP Phones, wireless access points, or
IEEE 802.3af-compliant devices to PoE ports. A cable or device that causes a PoE fault must be removed
from the network.
Voice over IP (VoIP) service and the emergency calling service do not function if power fails or is
Warning
disrupted. After power is restored, you might have to reset or reconfigure equipment to regain access
to VoIP and the emergency calling service. In the USA, this emergency number is 911. You need to be
aware of the emergency number in your country. Statement 361
Catalyst 3850 Switch Hardware Installation Guide
2-20
Recommended Ethernet Cables (When Auto-MDIX is Disabled)
Category 6 cable. 10BASE-T traffic can use Category 3 or Category 4 cable.
Table 1-15 on page 1-19
for the power supply modules required to support PoE, PoE+, and Cisco
1
Crossover Cable
Straight-Through Cable
Yes
No
Yes
No
No
Yes
No
Yes
No
Yes
"10/100/1000 Ethernet Port Connections" section on page
and
Appendix A, "Technical Specifications."
Chapter 2
Switch Installation
1
2-19.
OL-26779-02
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