GS1500-24P PoE for Cisco 7960 SIP

Hun

Hello All!
I've just purchased this used switch, and I have issue powering up Cisco 7960 phones. I have 5 of these phones, and so far I was able to power up only 1.
I'm using the B type pinout on Cat5,  the blue and brown pair is supplying the power. This 1 working phoneis  powering up on each port, the other phones wont boot up. Is it a phone issue??? All 4 of them???
Please advise....thanks for you time!
Attila.

Zyxel_Melen

Hi @Hun,

Just like gb5102 said, Cisco 7960 is an old model and only supports Cisco's proprietary 'pre-standard' PoE implementation which is not supported on GS1500-24P.

I list some devices below which support Pre-802.3at mode(pre-standard PoE), you may refer to the following links of introduction page:
GS1350-6HP:smart managed switch with 802.3at PoE Plus and 802.3bt PoE++ (Port 1 and 2 support)
GS1900-8HP:smart managed switch with 802.3at PoE Plus
GS1920-8HPv2:smart managed switch with 802.3at PoE Plus

Zyxel_Melen

Hi @Hun,

According to your description,  you can power up 1 phone on each port, so POE function looks workable.
I guest your cables which link to 4 nonworking phones may have some issue, could you have a test is that connect these phone to the cable which is link to working phone?
If the phone can work, that means you need to change cable. 

gb5102

Cisco 7960 is *very old* and only supports Cisco's proprietary 'pre-standard' PoE implementation. This phone will not work with a standard 802.3af/at PoE switch such as Zyxel switches.

See here for details: https://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-ip-phone-7900-series/97869-poe-requirement-faq.html#qa4

Hun

Hello and thanx for your time..... sorry for replying after long time, but I had some personal problems.
So, why's is this one phone powering up....could be something physically rewired inside this unit?

mMontana

Or a slight different sub-release of the phone, maybe PoE compliant..

Hun

OK, I guess that means different firmware or something like that...I guess... :-)
Thanx again!!!