User guide

Using the Phone Web User Interface

Setting Voice System Parameters

Cisco Small Business SPA50X and SPA51X Series SPCP IP Phone User Guide 50

Enable VLAN Choose yes to enable VLAN. Choose no to disable.

Enable CDP Enable CDP only if you are using a switch that has Cisco

Discovery Protocol (CDP). CDP is negotiation-based and

determines which VLAN the IP phone resides in.

Enable LLDP-

MED

Choose yes to enable LLDP-MED for the phone to advertise

itself to devices that use that discovery protocol. (By

default, this setting is enabled.)

When the LLDP-MED feature is enabled, after the phone has

initialized and Layer 2 connectivity is established, the

phone sends out LLDP-MED PDU frames. If the phone

receives no acknowledgment, the manually configured

VLAN or default VLAN is used if applicable. If CDP is used

concurrently, a waiting period of 6 seconds is used. The

waiting period increases the overall startup time for the

phone.

Network Startup

Delay

Enter the delay in seconds for the switch to get to the

forwarding state before the phone sends out the first LLDP-

MED packet. The default delay is 3 seconds. For

configuration of some switches, it might be necessary to

increase this value to a higher value for LLDP-MED to work.

Configuring a delay can be important for networks that use

Spanning Tree Protocol.

VLAN ID A value ranging from 0 to 4095 (default 0). The phone tags

all of the untagged frames coming from the PC. (It does not

tag frames with existing tags).

Asset ID Enter a string to identify the phone in inventory.

Parameter Description