7970 IP phone

Answered Question
Jul 29th, 2008

Hi all,

This may seem to be a wierd question. We have a user who got upgraded from a 7940 Ip phone to a 7970 IP phone. The new phone is setup from scratch.

The good news is that everything works absolutely fine. However, the user cannot increase the brightness on the phone. I thought that this could possibly be the problem with the phone and I replaced the IP phone whith another 7970 phone. The result sohow seems to be the same. Can anyone please tell me what is going on. Thanks in advance.

I have this problem too.
0 votes
Correct Answer by rob.huffman about 8 years 5 months ago

Hi Naveen,

This is a very good question! This is likely a PoE issue.

Have a look at the following, which details numerous PoE setups where the IP Phone will only be Half-brightness

Table 2-2 Power Consumption and Display Brightness for Power Configurations

Phone Screen Brightness Approx. 1/2

http://www.cisco.com/en/US/products/hw/phones/ps379/products_administration_guide_chapter09186a008066b8d0.html#wp1079121

Hope this helps!

Rob

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Correct Answer
rob.huffman Tue, 07/29/2008 - 12:03

Hi Naveen,

This is a very good question! This is likely a PoE issue.

Have a look at the following, which details numerous PoE setups where the IP Phone will only be Half-brightness

Table 2-2 Power Consumption and Display Brightness for Power Configurations

Phone Screen Brightness Approx. 1/2

http://www.cisco.com/en/US/products/hw/phones/ps379/products_administration_guide_chapter09186a008066b8d0.html#wp1079121

Hope this helps!

Rob

rob.huffman Wed, 07/30/2008 - 04:44

Hi Naveen,

You are most welcome my friend :) Thanks for the kind words.

Take care,

Rob

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