7941 IP Phone cant be powered On

[victor.oshiro]

Suddenly one of my Cisco 7941 Phone didnt want to power anymore.

I tried facatory dedefault reset , Reboot  many times ,the only light is green is the Speaker button. Screen is completely blank

i tried different Ethernet ports , etc.

Any suggestion ?

Thanks

[Chris Deren]

Sounds like it's bricked and will need to be replaced.

Chris

Sent from Cisco Technical Support iPhone App

[Leo Laohoo]

i tried different Ethernet ports , etc.

Need more info. 

Where does this phone draw it's power from.  If it's from a power brick of power injector, replace all.  This includes the power brick, injectors and also the CABLES. 

If it's PoE, then go to the switch and post the output to the command "sh power inline ".

[victor.oshiro]

Hi Leo,

it is PoE  , I have a 2911 Router.

How will be the procedure to check the PoE?

THanks

[Leo Laohoo · Accepted solution]

Post the output to the command "sh power inline".

[victor.oshiro]

2911Router:

tokvoice01(config)#sh power inline

% Invalid input detected at '^' marker.

tokvoice01(config)#exit

tokvoice01#sh power inline

Invalid input detected at '^' marker.

doesnt give me any output.

-This is the ephone that is not powering:

ephone-4[3] Mac:0021.5504.63DB TCP socket:[-1] activeLine:0 whisperLine:0 UNREGISTERED

mediaActive:0 whisper_mediaActive:0 startMedia:0 offhook:0 ringing:0 reset:0 reset_sent:0 paging 0 debug:0 caps:0

IP:0.0.0.0* 0 Unknown 0  keepalive 0 max_line 0 available_line 0

button 1: cw:1 ccw:(0 0)

  dn 4  number 2704 CH1   IDLE         CH2   IDLE        

button 2: cw:1 ccw:(0 0)

  dn 75 number 1010 CH1   DOWN         CH2   DOWN        

Preferred Codec: g711ulaw

[Aman Soi]

Hi Victor,

You are trying to run the command on router.

You need to provide the output from POE switch or you are running POE module on router if any. please share show inventory/show diag

also, share output of show cdp neighbours details from switch/router

regds,

aman

[victor.oshiro]

the router is connected to a Juniper Switch , it seems that it is from the switch  where the Router has its power.

Although  all ports are work accordingly . I have tested in another LAN ports but phone doenst work. I dont have the Power adaoter for the unit( just relying on POE)

Hope that the output below helps

tokvoice01(config)#do show cdp neighbors

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge

                  S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone,

                  D - Remote, C - CVTA, M - Two-port Mac Relay

Device ID        Local Intrfce     Holdtme    Capability  Platform  Port ID

se-10-60-20-11   ISM0/0             153              H    ISM-SRE-3 Gig  0

tokvoice01(config)#

tokvoice01(config)#do show inventory

NAME: "CISCO2911/K9 chassis", DESCR: "CISCO2911/K9 chassis"

PID: CISCO2911/K9      , VID: V04 , SN: FGL154511FP

NAME: "VWIC2-1MFT-T1/E1 - 1-Port RJ-48 Multiflex Trunk - T1/E1 on Slot 0 SubSlot 0", DESCR: "VWIC2-1MFT-T1/E1 - 1-Port RJ-48 Multiflex Trunk - T1/E1"

PID: VWIC2-1MFT-T1/E1  , VID: V01 , SN: FOC16030S8Q

NAME: "PVDM3 DSP DIMM with 16 Channels on Slot 0 SubSlot 4", DESCR: "PVDM3 DSP DIMM with 16 Channels"

PID: PVDM3-16          , VID: V01 , SN: FOC15405MAL

NAME: "PVDM3 DSP DIMM with 16 Channels on Slot 0 SubSlot 5", DESCR: "PVDM3 DSP DIMM with 16 Channels"

PID: PVDM3-16          , VID: V01 , SN: FOC16055PUU

NAME: "Internal Services Module with Services Ready Engine on Slot 0", DESCR: "Internal Services Module with Services Ready Engine"

PID: ISM-SRE-300-K9    , VID: V02 , SN: FOC16041RTN

NAME: "C2911 AC Power Supply", DESCR: "C2911 AC Power Supply"

PID: PWR-2911-AC       , VID: V03 , SN: AZS154205WD

[Leo Laohoo]

Your router does not have PoE. 

PS:  Please don't post screenshots.  Just copy and paste the output.

[Aman Soi]

Hi Victor,

I think u need to go as per Chris suggestions.

Router has its own power supply unit to get powered ON while phones are dependent on Juniper POE module.

regds,

aman