Planet Networking & Communication SGS-5240 Series User Manual page 68

All ports are set to VLAN hybrid mode by default. Prior to enabling VoIP for a port (by setting the VoIP mode to Auto or Manual
◆Mode – Specifies if the port will be added to the Voice VLAN when VoIP traffic is detected. (Default: None)
as described below), first ensure that VLAN membership is not set to access mode.

None – The Voice VLAN feature is disabled on the port. The port will not detect VoIP traffic or be added to the
Voice VLAN.

Auto – The port will be added as a tagged member to the Voice VLAN when VoIP traffic is detected on the port.
You must select a method for detecting VoIP traffic, either OUI or 802.1AB (LLDP). When OUI is selected, be
sure to configure the MAC address ranges in the Telephony OUI list.

Manual – The Voice VLAN feature is enabled on the port, but the port must be manually added to the Voice
VLAN.
 Security – Enables security filtering that discards any non-VoIP packets received on the port that are tagged with the
voice VLAN ID. VoIP traffic is identified by source MAC addresses configured in the Telephony OUI list, or through LLDP
that discovers VoIP devices attached to the switch. Packets received from non-VoIP sources are dropped. (Default:
Disabled)
 Discovery Protocol – Selects a method to use for detecting VoIP traffic on the port. (Default: OUI)

OUI – Traffic from VoIP devices is detected by the Organizationally Unique Identifier (OUI) of the source MAC
address. OUI numbers are assigned to vendors and form the first three octets of a device MAC address. MAC
address OUI numbers must be configured in the Telephony OUI list so that the switch recognizes the traffic as
being from a VoIP device.

LLDP – Uses LLDP (IEEE 802.1AB) to discover voice vlan devices attached to the port. LLDP checks that the
"telephone bit" in the system capability TLV is turned on.
 Priority – Defines a CoS priority for port traffic on the Voice VLAN. The priority of any received voice vlan packet is
overwritten with the new priority when the Voice VLAN feature is active for the port. (Range: 0-6; Default: 6)
 Remaining Age – Number of minutes before this entry is aged out.
User's Manual of SGS-5240 Series Managed Switch
68