CISCO IP PHONE SET UP

tech1guy
tech1guy used Ask the Experts™
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I just have a simple question. According to my understaing when setting the Cisco IP phone and the PC, the recommended way of doing is Switch > Cisco IP PHONE > From ip phone to PC. But I have came across one setup, in that Switch > PC and Pc to Ip Phone. I understand that voice and data have different VLAN. If both the ways are same then why first method is preferred. Is something wrong in the second method.

Second question does all the cisco phones has switch ports?
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Commented:
The first method is prefered just to "save" switch ports and cables (from the room to patch panel switch, etc.), even if both are in the same vlan

Using VLAN's is supposabely a bit more secure.

On the other hand, if you plan to implement tighter secruity in the future then the whole concept of allowing a PC to connect behind a phone is less secure, since it is much harder to protect, and makes every phone a potential hub.

Not all Cisco IP Phones come with an additional port, but I think that most of them does...
Sr. Systems Engineer
Top Expert 2008
Commented:
1. Typically, we use PoE to power the phones, and we use different VLAN's for voice and Data.
If you connect a phone to the switch and PC to the phone then the phone gets power, recognizes voice vlan and passes data vlan to the PC (works as designed)
>Switch > PC and Pc to Ip Phone
Most PC's don't have dual NIC's. No PC has a PoE NIC, so really not practical to try that.
You can easily connect a small switch to the PC port on the phone and provide network to PC, printer, maybe another PC in a small office.

2. Most, but not all Cisco phones have the switchport. Those that don't are mainly used where there is no PC, like in a breakroom, lobby, etc.

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