7942 does not has any display when i use 7942 to replace 7940

[fq_z1999]

Hi,All:

         i met one problem, i delivered one new 7942g phone to another site in order to replace old 7940G,  7942G can work well with POE in my site and 7940G also can work well with POE in another site. but when replace old 7940G by using new 7942, the new 7942 can not get any display on screen, POE switch port light yellow ,what reason cause this problem?how to fix it ?anyone has ideas?

[Joseph Martini]

What kind of switch is the phone connected to and not working?  What is the output of "show inline power".  Both the 7940 and 7942 use 6.3 watts so the switch should have enough power since it's the same requirement.

[fq_z1999]

this is error message when i connect 7942G to Switch :

fa0/27  auto   power-deny   0.0   n/a   n/a  6.3

seemingly i need increase power max consumption ,right?

this is switch type:ws-c3560-48ps

this is switch IOS:c3560-ipbasek9-M

   any help will be grateful . thx in advance

[Novriadi .]

Like joemar mention above, use "sh inline power" on your POE switch, and calculate for available power (watt) on your switch to handle one 7942. it seems the problem is your POE 48 port switch doesn't have enough power to cover your 7942 phone.

[fq_z1999]

POE-Switch>show power inline

Available:370.0(w)  Used:63.0(w)  Remaining:307.0(w)

personally i think i need increase port power  max consumption