Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

7941 IP Phone cant be powered On

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

  • IP Telephony
1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Gold

7941 IP Phone cant be powered On

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

9 REPLIES
Hall of Fame Super Silver

Re: 7941 IP Phone cant be powered On

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

Chris

Sent from Cisco Technical Support iPhone App

Hall of Fame Super Gold

7941 IP Phone cant be powered On

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 ".

New Member

7941 IP Phone cant be powered On

Hi Leo,

it is PoE  , I have a 2911 Router.

How will be the procedure to check the PoE?

THanks

Hall of Fame Super Gold

7941 IP Phone cant be powered On

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

New Member

7941 IP Phone cant be powered On

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


VIP Purple

7941 IP Phone cant be powered On

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

New Member

Re: 7941 IP Phone cant be powered On

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

Hall of Fame Super Gold

7941 IP Phone cant be powered On

Your router does not have PoE. 

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

VIP Purple

7941 IP Phone cant be powered On

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

264
Views
0
Helpful
9
Replies