PoE (the 802.3af standard) was a major improvement over early inline power solutions, with features like GigE compatibility and more power per port (15.4W, vs. 7W). PoE was extended to provide up to 30W per port of power to expand the usefulness of PoE to other devices besides the usual phone and wireless AP uses that the 802.3af standard sees.
Cisco Inline Power, POE, and the new POE+, which one do you need? Here’s a quick breakdown of the three different types of power over Ethernet:
Guide to Power Standards
Cisco Inline Power
- Cisco-proprietary
- 10/100 only
- 7W/port
- Incompatible with all non-Cisco devices that accept power over Ethernet
Examples of Cisco inline power only devices are: CP-7940G/7960G, AIR-AP1231G-A-K9
802.3af PoE
- ·IEEE standard
- ·15.4W/port
- ·Compatible with gigabit Ethernet
- ·Not compatible in any way with Cisco inline power–the power negotiation process is completely different
- ·Enough power for most IP phones and wireless access points from all manufacturers.
Examples of devices that accept both 802.3af and Cisco power: CP-7941G/7961G, CP-7942G/7962G, AIR-AP1131AG-A-K9, AIR-AP1242AG-A-K9 (note that for Cisco power, the APs only work with the WS-C3550-24PWR)
Examples of devices that only accept 802.3af power: CP-7945G/CP-7965G, CP-7941G-GE/7961G-GE, AIR-AP1142N-A-K9, WS-C2960PD-8TT-L (this switch is powered via PoE, and is not a power-providing switch)
The presence of a gigabit Ethernet port on a powered device is a clear indicator that the device is 802.3af only.
802.3at PoE+
- ·Backwards compatible with 802.3af; PoE+ just adds an additional class of power to the 802.3af standard
- ·30W/port
- ·Relatively new; currently only Cisco is shipping PoE+ phones
Because of the relative newness of PoE+, few devices require this level of power. Only the AIR-AP1252AG-A-K9 and the CP-8900/9900 phones require PoE+ in Cisco’s lineup. In addition, a few 3rd party IP security cameras have been released that also need PoE+
Power Sources: PoE Switches
| Power Sources: PoE Switches | ||||
|
Part ID |
Description |
Inline |
802.3af PoE |
802.3at PoE+ |
|
WS-C3524-PWR-XL-EN |
Catalyst 3500 24 Port 10/100 inline power switch with 2 GBIC slots, Enterprise Edition |
+ |
– |
– |
|
WS-C3550-24PWR-SMI |
Catalyst 3550 24-10/100 inline power + 2 GBIC ports: SMI |
+ |
– |
– |
|
WS-C3560-24PS-S |
Catalyst 3560 24 10/100 PoE + 2 SFP + IPB Image |
+ |
+ |
– |
|
WS-C3560G-24PS-S |
Catalyst 3560 24 10/100/1000T PoE + 4 SFP + IPB Image |
+ |
+ |
– |
|
WS-C3560E-24PD-S |
Catalyst 3560E 24 10/100/1000 PoE+2*10GE(X2),750W,IPB s/w |
+ |
+ |
– |
|
WS-C3560X-24P-S |
Catalyst 3560X 24 Port PoE IP Base |
+ |
+ |
+ |
|
WS-C3560-48PS-S |
Catalyst 3560 48 10/100 PoE + 4 SFP IPB Image |
+ |
+ |
– |
|
WS-C3560G-48PS-S |
Catalyst 3560 48 10/100/1000T PoE + 4 SFP + IPB Image |
+ |
+ |
– |
|
WS-C3560E-48PD-S |
Catalyst 3560E 48 10/100/1000 PoE+2*10GE(X2),750W,IPB s/w |
+ |
+ |
– |
|
WS-C3560E-48PD-SF |
Catalyst 3560E 48 10/100/1000 PoE+2*10GE(X2),1150W,IPB s/w |
+ |
+ |
– |
|
WS-C3560X-48P-S |
Catalyst 3560X 48 Port PoE IP Base |
+ |
+ |
+ |
|
WS-C3560X-48PF-S |
Cisco Catalyst 3560X-48PF-S – switch – managed – 48 ports |
+ |
+ |
+ |
|
WS-C3750-24PS-S |
Catalyst 3750 24 10/100 PoE + 2 SFP + IPB Image |
+ |
+ |
– |
|
WS-C3750G-24PS-S |
Catalyst 3750 24 10/100/1000T PoE + 4 SFP + IPB Image |
+ |
+ |
– |
|
WS-C3750E-24PD-S |
Catalyst 3750E 24 10/100/1000 PoE+2*10GE(X2),750W,IPB s/w |
+ |
+ |
– |
|
WS-C3750X-24P-S |
Catalyst 3750X 24 Port PoE IP Base |
+ |
+ |
+ |
|
WS-C3750E-24PD-S |
Catalyst 3750E 24 10/100/1000 PoE+2*10GE(X2),750W,IPB s/w |
+ |
+ |
– |
|
WS-C3750E-48PD-SF |
Catalyst 3750E 48 10/100/1000 PoE+2*10GE(X2),1150W,IPB s/w |
+ |
+ |
– |
|
WS-C3750X-48P-S |
Catalyst 3750X 48 Port PoE IP Base |
+ |
+ |
+ |
|
WS-C3750X-48PF-S |
Stackable 48 10/100/1000 Ethernet PoE+ ports, with 1100W AC power supply |
+ |
+ |
+ |
|
WS-C2960-24PC-L |
Catalyst 2960 24 10/100 PoE+ 2 T/SFP LAN Base Image |
+ |
+ |
– |
|
WS-C2960-48PST-L |
Catalyst 2960 48 10/100 PoE+ 2 1000BT +2 SFP LAN Base Image |
+ |
+ |
– |
|
WS-C2960S-24PS-L |
Catalyst 2960S 24 GigE PoE+ 370W, 4 x SFP LAN Base |
+ |
+ |
+ |
|
WS-C2960S-24PD-L |
Catalyst 2960S 24 GigE PoE+ 370W, 2 x 10G SFP+ LAN Base |
+ |
+ |
+ |
|
WS-C2960S-48LPS-L |
Catalyst 2960S 48 GigE PoE+ 370W, 4 x SFP LAN Base |
+ |
+ |
+ |
|
WS-C2960S-48LPD-L |
Catalyst 2960S 48 GigE PoE+ 370W, 2 x 10G SFP+ LAN Base |
+ |
+ |
+ |
|
WS-C2960S-48FPS-L |
Catalyst 2960S 48 GigE PoE+ 740W, 4 x SFP LAN Base |
+ |
+ |
+ |
|
WS-C2960S-48FPD-L |
Catalyst 2960S 48 GigE PoE+ 740W, 2 x 10G SFP+ LAN Base |
+ |
+ |
+ |
Power Sources: PoE Modules -Catalyst 4500
| Power Sources: PoE Modules-Catalyst 4500 | ||||
| Part ID | Description | Inline | 802.3af PoE | 802.3at PoE+ |
| WS-X4148-RJ45V | Catalyst 4000 inline power 10/100, 48-ports (RJ45) | + | – | – |
| WS-X4248-RJ45V | Catalyst 4500 PoE 802.3af 10/100, 48-Ports (RJ45) | + | + | – |
| WS-X4548-GB-RJ45V | Catalyst 4500 PoE 802.3af 10/100/1000, 48-Ports (RJ45) | + | + | – |
| WS-X4548-RJ45V+ | 4500 PoE+ Ready 10/100/1000, 48-Port (RJ45) | + | + | + |
| WS-X4648-RJ45V-E | Catalyst 4500 E-Series 48-Port PoE 802.3af 10/100/1000(RJ45) | + | + | – |
| WS-X4648-RJ45V+E | Catalyst 4500 E-Series 48-Port Premium PoE 10/100/1000 | + | + | + |
Power Sources: PoE Modules-Catalyst 6500
| Power Sources: PoE Modules-Catalyst 6500 | ||||
| Part ID | Description | Inline | 802.3af PoE | 802.3at PoE+ |
| WS-X6348-RJ45V | Catalyst 6000 48-port 10/100, ENH QOS, inline power, RJ-45 | + | – | – |
| WS-X6148-RJ45V | Catalyst 6500 48-port 10/100 inline power, RJ-45 | + | – | – |
| WS-X6148-45AF | Catalyst 6500 PoE 802.3af 10/100, 48-port (RJ45) line card | + | + | – |
| WS-X6148A-45AF | Catalyst 6500 48-port PoE 802.3af 10/100,card w/TDR | + | + | – |
| WS-X6148V-GE-TX | Catalyst 6500 48-port 10/100/1000 inline power module, RJ-45 | + | – | – |
| WS-X6148A-45AF | Cat6500 48-Port PoE 802.3af & ePoE 10/100/1000 line card | + | + | – |
| WS-X6148A-GE-45AF | Cat6500 48-Port PoE 802.3af & ePoE 10/100/1000 with Jumbo Frame | + | + | – |
| WS-X6548V-GE-TX | Catalyst 6500 48-port fabric-enabled inline power 10/100/1000 module | + | – | – |
| WS-X6548-GE-45AF | Cat6500 48-port PoE 802.3af & ePoE 10/100/1000 CEF256 card | + | + | – |
| Sample Devices | ||||
| Part ID | Description | Inline | 802.3af PoE | 802.3at PoE+ |
| CP-7940G | Cisco IP Phone 7940G, Global | + | – | – |
| CP-7960G | Cisco IP Phone 7960G, Global | + | – | – |
| CP-7941G | Cisco IP Phone 7941 | + | + | – |
| CP-7961G | Cisco IP Phone 7961 | + | + | – |
| CP-7945G | Cisco Unified IP Phone 7945, Gig Ethernet, Color | – | + | – |
| CP-7965G | Cisco Unified IP Phone 7965, Gig Ethernet, Color | – | + | – |
| AIR-AP1231G-A-K9 | 802.11a/g Non-modular IOS AP; RP-TNC; FCC Cnfg | + | – | – |
| AIR-AP1242AG-A-K9 | 802.11a/g Non-modular IOS AP; RP-TNC; FCC Cnfg | – | + | – |
| AIR-AP1252AG-A-K9 | 802.11a/g/n-d2.0 2.4/5-GHz Mod Auto AP; 6 RP-TNC; FCC | – | – | + |
| WS-C2960PD-8TT-L | Catalyst 2960 Powered Device 8 10/100 + 1 1000BT LAN Base | – | + | – |
More Related PoE
