Cortelco C56P User Manual download pdf (Page 20)

In chart 1, there is a layer 2 switches without setting VLAN. Any broadcast frame will be transmitted to the

other ports except the send port. For example, a broadcast information is sent out from port 1 then

transmitted to port 2,3and 4.

In chart 2, red and blue indicate two different VLANs in the switch, and port 1 and port 2 belong to red

VLAN, port 3 and port 4 belong to blue VLAN. If a broadcast frame is sent out from port 1, switch will

transmit it to port 2, the other port in the red VLAN and not transmit it to port3 and port 4 in blue VLAN. By

this means, VLAN divide the broadcast domain viare stricting the range of broadcast frame transmition.

Note: chart 2 use red and blue to identify the different VLAN, but in practice, VLAN uses different VLAN

IDs to identify.

QoS Configuration

Field name explanation

Enable LLDP Enable LLDP by selecting it

Packet Interval The time interval of sending LLDP Packet

Enable Learning

Function

After enabling LLDP Learn, telephone can automatically learn the

data of DSCP, 802.1p, VLAN ID from the switch. If the data is

different from the data of the LLDP server, telephone will change

its own value as the value of the switch（Synchronous with VLAN

in switch）

Enable DSCP Enable Dscp by selecting it

SIPDSCP Specify the value of the SIP DSCP

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Cortelco C56P User Manual Page 20