does Cisco 2940 support POE?

[LAAsm2012b]

what about the interfaces?

thanks.                

[singhaam007]

hi Song,

i dot think so its supported on 2940

Catalyst 2940-8TT-S 8 10/100 Ethernet ports and 1 10/100/1000 Ethernet port

Catalyst 2940-8TF-S 8 10/100 Ethernet ports, 1 SFP1

module slot, and 1 100BASE-FX port

http://www.cisco.com/en/US/docs/switches/lan/catalyst2950/software/release/12.1_19_ea1c/release/notes/OL543002.pdf

please rate if this helps.

thanks

[LAAsm2012b]

thank you.  what's about the interface?

[singhaam007]

hello,

didnt get you question,

if switch doesnt support POE then interface cant either. you need to use external power supply.

thanks

[LAAsm2012b]

if I plug a Cicso phone directly into the interface, does it get power? thx.

[singhaam007]

no it wont if switch does not support poe.

but you can use external power and it will work fine.

thanks

[LAAsm2012b]

? what about connects the Cisco phone to the wall jack? it shouldn't make difference, should it? but we do have 2940 in our prduction environment , and we use Cisco phone.

[singhaam007]

it shoudnt make any diffrence coz power will come from cisco switch.

are you using external power supply ??

try this on switch and it will tell you about POE on the switch

Network-Test#sh power inline
Available:370.0(w)  Used:18.9(w)  Remaining:351.1(w)

Interface Admin  Oper       Power   Device              Class Max
                            (Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Fa0/1     auto   off        0.0     n/a                 n/a   15.4
Fa0/2     auto   on         6.3     IP Phone 7942       2     15.4
Fa0/3     auto   on         6.3     IP Phone 7940       n/a   15.4
Fa0/4     auto   on         6.3     IP Phone 7940       n/a   15.4
Fa0/5     auto   off        0.0     n/a                 n/a   15.4
Fa0/6     auto   off        0.0     n/a                 n/a   15.4

it will show you if your phones getting power from switch.

thanks

[LAAsm2012b]

external power supply for Cisco phone connects 2940? that's what I am trying to figure out,

2940 doesn't support that CLI (show power inline)

[singhaam007 · Accepted solution]

Hello ,

thats i am trying to explain that you need external power source to supply power to your phones

check these link for diffrent options.

http://www.cisco.com/en/US/prod/collateral/voicesw/ps6788/phones/ps379/ps6951/product_data_sheet0900aecd804b4649.html

http://www.voiplink.com/Cisco_Power_Supplies_Batteries_s/77.htm

please rate if this helps.

thanks

[LAAsm2012b]

actually there is another soltuion for this, the Cisco phone comes with power cord, just use it.