GS1500-24P PoE for Cisco 7960 SIP

Hun
Hun Posts: 18
First Comment Friend Collector Second Anniversary
 Freshman Member
edited August 2022 in Switch
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.

Accepted Solution

All Replies

  • Zyxel_Melen
    Zyxel_Melen Posts: 1,142
    Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate 100 Answers
     Zyxel Employee
    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. 

    Melen
  • gb5102
    gb5102 Posts: 25
    First Comment Friend Collector Third Anniversary
     Freshman Member
    edited March 2021
    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.


  • Hun
    Hun Posts: 18
    First Comment Friend Collector Second Anniversary
     Freshman Member
    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
    mMontana Posts: 1,249
    50 Answers 1000 Comments Friend Collector Fourth Anniversary
     Guru Member
    edited June 2021
    Or a slight different sub-release of the phone, maybe PoE compliant..
  • Hun
    Hun Posts: 18
    First Comment Friend Collector Second Anniversary
     Freshman Member
    OK, I guess that means different firmware or something like that...I guess... :-)
    Thanx again!!!