Cisco 6921 phone won't power up.

[Bedevere Curry]

We have a Cisco 6921 that works with WS-X4548-GB-RJ45V (WS-C4503-E).

However, when connecting to WS-X6148-GE-TX with a WS-F6K-VPWR-GE it's not coming up.

It works with 7962 but not 6921.

Is there any compatibility issue with the 6921?

Thanks

Not working:

(WS-C6506-E - s72033-adventerprisek9-mz.151-1.SY.bin)

NAME: "3", DESCR: "WS-X6148-GE-TX 48 port 10/100/1000mb EtherModule Rev. 5.0"

PID: WS-X6148-GE-TX    ,                     VID:    ,

NAME: "Inline Power sub-module of 3", DESCR: "WS-F6K-VPWR-GE Cisco Voice Daughter Card Rev. 1.0"

PID: WS-F6K-VPWR-GE    ,                     VID:   

Working on:

(WS-C4503-E - cat4500-entservicesk9-mz.150-2.SG6.bin)

WS-X4548-GB-RJ45V

[Bedevere Curry]

I noticed on the 4503, the static config looks to show more power you can assign:

Could that be the issue?

FYI, I tried setting the max of 7000 on the port and it still didn't come up.

Not sure why.

(config-if)#power inline static max ?

  <4000-15400>  milli-watts

On the 6506 I see less:

(config-if)#power inline static max ?

  <4000-7000>  milli-watts

On the working switch:

I do see that this phone doesn't really take that much power.

#show powe inline

Available:800(w)  Used:377(w)  Remaining:423(w)

Interface Admin  Oper            Power(Watts)     Device              Class

                            From PS    To Device                   

--------- ------ ---------- ---------- ---------- ------------------- -----

Gi2/1     auto   off        0.0        0.0        n/a                 n/a 

Gi2/2     auto   on         6.7        6.0        IP Phone 6921       2   

Gi2/3     auto   on         6.7        6.0        IP Phone 6921       2   

[Rob Huffman · Accepted solution]

Hi Bedevere,

The 6921 has different PoE requirements;

Table 3. Power Requirements

Power Requirement	Description
IEEE 802.3af PoE	The phones can receive power from IEEE 802.3af-compliant blades.
Local power	The  phones can also be powered locally with a power adapter  (CP-PWR-CUBE-3=) along with one of the power cords listed in Table 4.

From;

http://www.cisco.com/en/US/prod/collateral/voicesw/ps6788/phones/ps10326/ps10343/data_sheet_c78-541534.html

And we see here that your blade does not supply IEEE 802.3af;

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/hardware/Module_Installation/Mod_Install_Guide/02ethern.html

Cheers!

Rob

"Why do the best things always disappear " 

- The Band

[Bedevere Curry]

Awesome. Thanks