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  • 1.  Alcatel lucent omni pcx phone system wont work on Aruba ION 1930-48G switch

    Posted 02-18-2025 05:19 AM

    The Charity I do IT support for has a team of engineers in at the moment putting in a new cabinet, Aruba switches, some new cabling and a load of Aruba access points. They replaced the unmanaged netgear switches we have had for years (Which have worked perfectly by the way) with two Aruba ION 1930 switches. The phone system however refuses to work with them. It will work if you leave it plugged into the old unmanaged netgear switch connected but not when plugged directly into the new Aruba. The IP phones just don't see the system when its plugged into the new switch.  

    Im no expert on network switches and I am kind of stuck between the people who support the phones blaming the switch guys and the network guys blaming the phone guys. I am just trying to get ideas as to where the problems might be so I can get ahead of the problem if possible. Any thoughts?



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    Barry Dobson
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  • 2.  RE: Alcatel lucent omni pcx phone system wont work on Aruba ION 1930-48G switch

    Posted 02-19-2025 09:12 AM

    Hi Barry.

    Not much info to go with.  Are switches locally or cloud managed? Do link leds light on when phone is connected to the switch? Do you use PoE to power phones or they have local power adapters? Are vlan-s configured correctly? Many unknowns.

    Better to get some real network guys onboard to look into switch and phone setups. 

    Best, Gorazd 



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    Gorazd Kikelj
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    Original Message


  • 3.  RE: Alcatel lucent omni pcx phone system wont work on Aruba ION 1930-48G switch

    Posted 02-19-2025 07:00 PM

    I don't know if this is your issue but I recently discovered something that may be related with some Cisco ATA VoIP endpoint equipment.  In the InstantOn cloud config no Voice VLAN network was specified which should disable LLDP-MED.  If you didn't know LLDP-MED is a standard that will allow VoIP endpoints to automatically be assigned to a dedicate VoIP VLAN.  Many devices have it enabled by default; if there is no LLDP-MED packet from the switch the devices will just drop into the default network.  In my case the client only has a tiny network with 5 VoIP devices so I didn't bother provisioning a Voice VLAN.  We discovered that the Cisco VoIP endpoints would make a DHCP request then just go off line.  For some reason the InstantOn switches were sending LLDP-MED instruction telling VoIP devices to drop into a black hole VLAN.

     

    I am assuming it is a bug otherwise it is bizarre behavior.  I didn't have time to chase down a fix on the Switches or contact support but disabling LLDP-MED on the VoIP endpoints fixed the issue keeping the devices in the default vlan network assigned to the port they were directly plugged into.

     




    Original Message


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