Hardcode Speed Duplex with Phone?

Answered Question
Aug 22nd, 2009

3560 with 7940 and PC hanging off 7940. PC is experiencing some pretty bad slowness often. Should I hardcode the speed and duplex on the 3560 port?? Would it mess up the phone?

Correct Answer by Giuseppe Larosa about 7 years 6 months ago

Hello Doug,

verify what is doing the phone when the PC has slow connectivity we have seen that if the phone registers/deregisters often the downstream PC can suffer of this.

I wouldn't hardcode the speed and duplex because there is no way to configure the phone.

Look also at the 3560 logs to see if there are messages about POE events related to the port where the phone connects to.

Also we had few cases of phones with a no working PC port.

If you have a chance connect the same PC to the PC port of another phone in the same room and see if the behaviour changes.

Hope to help

Giuseppe

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Correct Answer
Giuseppe Larosa Sat, 08/22/2009 - 10:43

Hello Doug,

verify what is doing the phone when the PC has slow connectivity we have seen that if the phone registers/deregisters often the downstream PC can suffer of this.

I wouldn't hardcode the speed and duplex because there is no way to configure the phone.

Look also at the 3560 logs to see if there are messages about POE events related to the port where the phone connects to.

Also we had few cases of phones with a no working PC port.

If you have a chance connect the same PC to the PC port of another phone in the same room and see if the behaviour changes.

Hope to help

Giuseppe

glen.grant Sat, 08/22/2009 - 14:31

You have 2 issues here . How is the phone set, that guides what you do with the switch, if the phone is auto then the switch must be auto. My guess is it is auto . The second issue is the pc connection on the phone is probably auto so if for some reason the pc nic card was hardcoded at some point then this will also cause issues. Make sure the pc nic is auto also.

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