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New Member

Diferentes consumos de potencia en equipos 7945(6.3 w y 12 w).

Hola, buen dia.

Me gustaría saber el motivo por el cual, el mismo tipo de telefono ip(7945), me consume diferente potencia(6.3 w  o  12 w).

SW3560#sh power inline
Available:370.0(w)  Used:351.3(w)  Remaining:18.7(w)

Interface Admin  Oper       Power   Device              Class Max
                            (Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi0/1     auto   on         15.0    AIR-LAP1242AG-A-K9  3     15.4
Gi0/2     auto   on         13.0    AIR-LAP1242AG-A-K9  3     15.4
Gi0/3     auto   on         13.0    AIR-LAP1242AG-A-K9  3     15.4
Gi0/4     auto   on         15.0    AIR-LAP1242AG-A-K9  3     15.4
Gi0/5     auto   on         13.0    AIR-LAP1242AG-A-K9  3     15.4
Gi0/6     auto   on         13.0    AIR-LAP1242AG-A-K9  3     15.4
Gi0/7     auto   on         15.0    AIR-LAP1242AG-A-K9  3     15.4
Gi0/8     auto   on         13.0    AIR-LAP1242AG-A-K9  3     15.4
Gi0/9     auto   on         15.0    AIR-LAP1242AG-A-K9  3     15.4
Gi0/10    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4
Gi0/11    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4
Gi0/12    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4
Gi0/13    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4
Gi0/14    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4
Gi0/15    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4
Gi0/16    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4
Gi0/17    auto   off        0.0     n/a                 n/a   15.4
Gi0/18    auto   off        0.0     n/a                 n/a   15.4
Gi0/19    auto   on         15.0    AIR-LAP1242AG-A-K9  3     15.4
Interface Admin  Oper       Power   Device              Class Max
                            (Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi0/20    auto   off        0.0     n/a                 n/a   15.4
Gi0/21    auto   on         6.3     IP Phone 7945       3     15.4
Gi0/22    auto   on         6.3     IP Phone 7945       3     15.4
Gi0/23    auto   on         6.3     IP Phone 7975       3     15.4
Gi0/24    auto   on         6.3     IP Phone 7945       3     15.4
Gi0/25    auto   off        0.0     n/a                 n/a   15.4
Gi0/26    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/27    auto   off        0.0     n/a                 n/a   15.4
Gi0/28    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/29    auto   off        0.0     n/a                 n/a   15.4
Gi0/30    auto   on         6.3     IP Phone 7945       3     15.4
Gi0/31    auto   off        0.0     n/a                 n/a   15.4
Gi0/32    auto   off        0.0     n/a                 n/a   15.4
Gi0/33    auto   on         6.3     IP Phone 7945       3     15.4
Gi0/34    auto   off        0.0     n/a                 n/a   15.4
Gi0/35    auto   off        0.0     n/a                 n/a   15.4
Gi0/36    auto   on         6.3     IP Phone 7975       3     15.4
Gi0/37    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/38    auto   on         6.3     IP Phone 7962       2     15.4
Gi0/39    auto   on         6.3     IP Phone 7945       3     15.4
Gi0/40    auto   off        0.0     n/a                 n/a   15.4
Gi0/41    auto   off        0.0     n/a                 n/a   15.4
Interface Admin  Oper       Power   Device              Class Max
                            (Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi0/42    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/43    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/44    auto   on         12.0    IP Phone 7945       3     15.4
Gi0/45    auto   off        0.0     n/a                 n/a   15.4
Gi0/46    auto   off        0.0     n/a                 n/a   15.4
Gi0/47    auto   off        0.0     n/a                 n/a   15.4
Gi0/48    auto   off        0.0     n/a                 n/a   15.4
SW3560#

Como pueden observar, en algunos puertos del switch tengo conectados equipos 7945 y en unos indica un consumo de potencia de 6.3 w    mientras   que

en otros me indica un consumo de potencia de 12 w.

Quiero saber si necesito configurar algun parametro en el Call Manager o en el switch para dejar  todos mis equipos(7945),  operando con la menor potencia (6.3 w),

Les agradezco de antemano,  saludos.

8 REPLIES
Hall of Fame Super Gold

Diferentes consumos de potencia en equipos 7945(6.3 w y 12 w).

Can you post "show cdp neig xxx detail" for two interfaces reporting different power usage.

New Member

Diferentes consumos de potencia en equipos 7945(6.3 w y 12 w).

Sorry Paolo, I hadn´t seen your answer, that´s why I opened another discussion.

Here you got  what you´re  asking  me:

SW3560#sh power inline
Available:370.0(w)  Used:345.0(w)  Remaining:25.0(w)

Interface Admin  Oper       Power   Device              Class Max
                            (Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi0/21    auto   on         6.3     IP Phone 7945       3     15.4
Gi0/26    auto   on         12.0    IP Phone 7945       3     15.4

SW3560#sh cdp neighbors gigabitEthernet 0/21 detail
-------------------------
Device ID: SEP002584A31E30
Entry address(es):
  IP address: 10.9.24.68
Platform: Cisco IP Phone 7945,  Capabilities: Host Phone Two-port Mac Relay
Interface: GigabitEthernet0/21,  Port ID (outgoing port): Port 1
Holdtime : 135 sec
Second Port Status: Up

Version :
SCCP45.9-0-3S

advertisement version: 2
Duplex: full
Power drawn: 12.000 Watts
Power request id: 7728, Power management id: 1
Power request levels are:12000 0 0 0 0
Management address(es):

SW3560#

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

SW3560#sh cdp neighbors gigabitEthernet 0/26 detail
-------------------------
Device ID: SEP00260B5BD1B8
Entry address(es):
  IP address: 10.9.24.4
Platform: Cisco IP Phone 7945,  Capabilities: Host Phone Two-port Mac Relay
Interface: GigabitEthernet0/26,  Port ID (outgoing port): Port 1
Holdtime : 121 sec
Second Port Status: Up

Version :
SCCP45.9-0-3S

advertisement version: 2
Duplex: full
Power drawn: 12.000 Watts
Power request id: 53688, Power management id: 3
Power request levels are:12000 0 0 0 0
Management address(es):

SW3560#

I will be waiting for your answer.

Regards

Gonzalo Olmeda.

Hall of Fame Super Gold

Diferentes consumos de potencia en equipos 7945(6.3 w y 12 w).

This is strange and I can't make sense of it.

From documentation, under no circumstance the 7945 should be using 6.3w. All the 7945s I've installed use the documented 12w.

I've found this document that mentions a "power up" mode of 6.3w

http://www.cisco.com/en/US/products/hw/phones/ps379/products_qanda_item09186a00808996f3.shtml

Maybe check if the phone showing 6.3w have display on, and is registered.

New Member

Diferentes consumos de potencia en equipos 7945(6.3 w y 12 w).

Hi Paolo.

What I did,  is to turn the port gi0/33 off  so that I can verify if the remaining power would increase to  6.3w or to 12w.

And what I realized  is that the remaining power increased in 6.3w, rather than 12w. (It increased from 25w to 31.3w) 

So the really power drawn at this device is 6.3w,  isn´t it???

The big question still remains,  why some devices are comsuming 6.3w while others 12w???

Note:  I got a 7945 connected at the switch port gi0/33, and the power consumption indictated by the switch  is 6.3w.

SW3560#sh power inline

Available:370.0(w)  Used:345.0(w) Remaining:25.0(w)                 ( With the swich port gi0/33 ON )

Interface Admin  Oper       Power   Device              Class Max

                            (Watts)

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

Gi0/1     auto   on         15.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/2     auto   on         13.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/3     auto   on         13.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/4     auto   on         15.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/5     auto   on         13.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/6     auto   on         13.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/7     auto   on         15.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/8     auto   on         13.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/9     auto   on         15.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/10    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4

Gi0/11    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4

Gi0/12    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4

Gi0/13    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4

Gi0/14    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4

Gi0/15    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4

Gi0/16    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4

Gi0/17    auto   off        0.0     n/a                 n/a   15.4

Gi0/18    auto   off        0.0     n/a                 n/a   15.4

Gi0/19    auto   on         15.0    AIR-LAP1242AG-A-K9  3     15.4

Interface Admin  Oper       Power   Device              Class Max

                            (Watts)

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

Gi0/20    auto   off        0.0     n/a                 n/a   15.4

Gi0/21    auto   on         6.3     IP Phone 7945       3     15.4

Gi0/22    auto   on         6.3     IP Phone 7945       3     15.4

Gi0/23    auto   on         6.3     IP Phone 7975       3     15.4

Gi0/24    auto   on         6.3     IP Phone 7945       3     15.4

Gi0/25    auto   off        0.0     n/a                 n/a   15.4

Gi0/26    auto   on         12.0    IP Phone 7945       3     15.4

Gi0/27    auto   off        0.0     n/a                 n/a   15.4

Gi0/28    auto   on         12.0    IP Phone 7945       3     15.4

Gi0/29    auto   off        0.0     n/a                 n/a   15.4

Gi0/30    auto   off        0.0     n/a                 n/a   15.4

Gi0/31    auto   off        0.0     n/a                 n/a   15.4

Gi0/32    auto   off        0.0     n/a                 n/a   15.4

Gi0/33    auto   on         6.3     IP Phone 7945       3     15.4

Gi0/34    auto   off        0.0     n/a                 n/a   15.4

Gi0/35    auto   off        0.0     n/a                 n/a   15.4

Gi0/36    auto   on         6.3     IP Phone 7975       3     15.4

Gi0/37    auto   on         12.0    IP Phone 7945       3     15.4

Gi0/38    auto   on         6.3     IP Phone 7962       2     15.4

Gi0/39    auto   on         6.3     IP Phone 7945       3     15.4

Gi0/40    auto   off        0.0     n/a                 n/a   15.4

Gi0/41    auto   off        0.0     n/a                 n/a   15.4

Interface Admin  Oper       Power   Device              Class Max

                            (Watts)

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

Gi0/42    auto   on         12.0    IP Phone 7945       3     15.4

Gi0/43    auto   on         12.0    IP Phone 7945       3     15.4

Gi0/44    auto   on         12.0    IP Phone 7945       3     15.4

Gi0/45    auto   off        0.0     n/a                 n/a   15.4

Gi0/46    auto   off        0.0     n/a                 n/a   15.4

Gi0/47    auto   off        0.0     n/a                 n/a   15.4

Gi0/48    auto   off        0.0     n/a                 n/a   15.4

SW3560#

SW3560#sh power inline

Available:370.0(w)  Used:338.7(w)  Remaining:31.3(w)                     ( With the switch port gi0/33 OFF )

Interface Admin  Oper       Power   Device              Class Max

                            (Watts)

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

Gi0/1     auto   on         15.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/2     auto   on         13.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/3     auto   on         13.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/4     auto   on         15.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/5     auto   on         13.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/6     auto   on         13.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/7     auto   on         15.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/8     auto   on         13.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/9     auto   on         15.0    AIR-LAP1242AG-A-K9  3     15.4

Gi0/10    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4

Gi0/11    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4

Gi0/12    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4

Gi0/13    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4

Gi0/14    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4

Gi0/15    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4

Gi0/16    auto   on         11.8    AIR-LAP1242AG-A-K9  3     15.4

Gi0/17    auto   off        0.0     n/a                 n/a   15.4

Gi0/18    auto   off        0.0     n/a                 n/a   15.4

Gi0/19    auto   on         15.0    AIR-LAP1242AG-A-K9  3     15.4

Interface Admin  Oper       Power   Device              Class Max

                            (Watts)

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

Gi0/20    auto   off        0.0     n/a                 n/a   15.4

Gi0/21    auto   on         6.3     IP Phone 7945       3     15.4

Gi0/22    auto   on         6.3     IP Phone 7945       3     15.4

Gi0/23    auto   on         6.3     IP Phone 7975       3     15.4

Gi0/24    auto   on         6.3     IP Phone 7945       3     15.4

Gi0/25    auto   off        0.0     n/a                 n/a   15.4

Gi0/26    auto   on         12.0    IP Phone 7945       3     15.4

Gi0/27    auto   off        0.0     n/a                 n/a   15.4

Gi0/28    auto   on         12.0    IP Phone 7945       3     15.4

Gi0/29    auto   off        0.0     n/a                 n/a   15.4

Gi0/30    auto   off        0.0     n/a                 n/a   15.4

Gi0/31    auto   off        0.0     n/a                 n/a   15.4

Gi0/32    auto   off        0.0     n/a                 n/a   15.4

Gi0/33    auto   off        0.0     n/a                 n/a   15.4

Gi0/34    auto   off        0.0     n/a                 n/a   15.4

Gi0/35    auto   off        0.0     n/a                 n/a   15.4

Gi0/36    auto   on         6.3     IP Phone 7975       3     15.4

Gi0/37    auto   on         12.0    IP Phone 7945       3     15.4

Gi0/38    auto   on         6.3     IP Phone 7962       2     15.4

Gi0/39    auto   on         6.3     IP Phone 7945       3     15.4

Gi0/40    auto   off        0.0     n/a                 n/a   15.4

Gi0/41    auto   off        0.0     n/a                 n/a   15.4

Interface Admin  Oper       Power   Device              Class Max

                            (Watts)

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

Gi0/42    auto   on         12.0    IP Phone 7945       3     15.4

Gi0/43    auto   on         12.0    IP Phone 7945       3     15.4

Gi0/44    auto   on         12.0    IP Phone 7945       3     15.4

Gi0/45    auto   off        0.0     n/a                 n/a   15.4

Gi0/46    auto   off        0.0     n/a                 n/a   15.4

Gi0/47    auto   off        0.0     n/a                 n/a   15.4

Gi0/48    auto   off        0.0     n/a                 n/a   15.4

SW3560#

Best Regards...

Gonzalo Olmeda.

Hall of Fame Super Gold

Diferentes consumos de potencia en equipos 7945(6.3 w y 12 w).

As mentioned above:

Maybe check if the phone showing 6.3w have display on, and is registered.

New Member

Diferentes consumos de potencia en equipos 7945(6.3 w y 12 w).

Yes Paolo, I have already checked it, it has the display on and it´s registered.

Regards...

Hall of Fame Super Gold

Diferentes consumos de potencia en equipos 7945(6.3 w y 12 w).

Sorry, I'm unable to explain what you're observing.

New Member

Diferentes consumos de potencia en equipos 7945(6.3 w y 12 w).

Thank you soo much for your help Paolo.

Best Regards.

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