Two VOIP phones, one cable, two switches.

[Progress]

Hi - Here's a good one -

 

we have an external building that I want to put two Yealink VOIP phones into - The phones are all on their own, completely separate network LAN.

 

I have run a cable from a network point in the main building to the cabinet in the external building - Patched that back to the dedicated VOIP/POE switch.

 

Plugged the other end of that cable into a dedicated switch in the external building and patched that through to the two phone points..

 

One works, one doesn't - But works back in the main building.

 

Its as if the line from the main building to external building will only allow one phone.

 

Have I missed something?

[keithu]

Port Security set on the VOIP switch?

[mtillbrook]

Does the port into which the non-working phone is plugged, work? Ie, is there a connection between the wall socket and the patch panel?

[Progress]

Nope - Everythings open..

[Progress]

Hi, yes if I plug either phone directly into the link socket, it will work - It's when I plug the link cable into the switch that only one phone works, (the same phone each time). All cables have been checked and swopped just in case. I have also factory reset the mini switch which is a Netgear GS110TP.

[ricki]

Are the ports on the correct vlan

[Progress]

Hi - yes they are - Looks like I will running another cable over Summer....

[keithu]

What type of switch is your VOIP/POE switch? Can you post the config?

[mavhc]

Could the phones be set differently, wrt vlan config perhaps?

[bald_pig]

port security on the VOIP switch in the main building?

[leegcvcc]

not enough licenses? (if they are licensed)

[robyholmes]

Duplicate IP address? Either between phones or phone & switch?

[ricki]

are the ports connecting the two switch trunked to let all the clans through

[ricki]

If you put the phones in the main building do they both work together

[Progress]

Its an out of the box Netgear GS110TP - The main building side is a Linksys LGS326P, again no modifications or port security.

 

IP's are different, phone config is identical, the phone works in the main building.

 

The only thing I thought of was that both switches are POE -so maybe the data/power split over a single cable was interfering. So I disabled POE on the main building port - Still no change.

 

Thanks for all the suggestions..

[mavhc]

Switch firmware update? What does the switch say the status is?

[Progress]

I'll try that - thanks

[Davit2005]

Its an out of the box Netgear GS110TP - The main building side is a Linksys LGS326P, again no modifications or port security.

 

IP's are different, phone config is identical, the phone works in the main building.

 

The only thing I thought of was that both switches are POE -so maybe the data/power split over a single cable was interfering. So I disabled POE on the main building port - Still no change.

 

Thanks for all the suggestions..

 

So you have out of the box switch so it has no vlans, every port is untagged on Default vlan i.e. vlan 1. In this scenario it will act as a dumb switch, in my experience IP phones are normally tagged on the Voice vlan and then untagged on the data vlan so a PC can be plugged in to the phone and work on a different vlan. To verify this I suggest you look at an existing switch on your network where you have a phone plugged in. You may also need to specifically specify which is your voice for vlan on the new Netgear GS110TP , but again verify this is needed by comparing with a switch in the main building that works.

 

PoE will not pass through a switch, much like vlans will not unless a port has been setup for the vlans (i.e. HP tagged or in Cisco Trunk)

Edited July 19, 2018 by Davit2005