03-24-2008 12:05 PM - edited 03-15-2019 09:36 AM
I am running CME v4.x on a 2821 with an NM-ESW-16. I plug a 7931 phone into one of the switch ports. The 7931 does not power up. I have shut and no shut the port and tried all other ports. I can get a 7941 to power up. Does anyone have any idea if the 7931 can be powered from the NM-ESW-16?
03-24-2008 12:12 PM
It should, matter is, that's not the first time similar problems are heard. What exact IOS do you have on the 2821 ? and which exact FW on the 7931 ?
05-02-2008 11:30 AM
I am not sure what the FW for the phone is. The IOS version is 12.4(15)T3.
05-02-2008 02:57 PM
Can you try:
power inline delay shutdown 20 initial 300
under interface configuration.
Hope this helps, please rate post if it does!
03-24-2008 12:32 PM
Hi Tun,
I think that you have discovered the porblem here. The 7931 is a Class 3 PoE Device (requires 15.4W);
IEEE 802.3af PoE
Can receive power from IEEE 802.3af-compliant data switches (Class III)
From everything I can find out about the NM-ESW-16 is that it only supplies Cisco Pre-Standard PoE for Class 2 Devices like the 7941 (7W)
Hope this helps!
Rob
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