TLV impact on system parameter values

Last Updated : Apr 17, 2026 |
Prolog information
Metadata
Keywords:
System parameter name
TLV name
Impact
PHY2VLAN
IEEE 802.1 Port VLAN ID
The value of the PHY2VLAN parameter on the phone is configured from the value of the Port VLAN identifier in the TLV.
L2QVLAN and L2Q
IEEE 802.1 VLAN Name
The value is changed to the TLV VLAN Identifier. L2Q is set to
A check is made as to whether a reset is necessary to obtain a new IP address due to a change in the values of the parameters L2Q or L2QVLAN.
VLAN Name TLV is ignored if:
  • The value of USE_DHCP is
  • .
  • The current value of L2QVLAN was set by a TIA LLDP MED Network Policy TLV.
  • The VLAN name in the TLV does not contain the substring voice in lower-case, upper-case or mixed-case ASCII characters anywhere in the VLAN name.
L2Q, L2QVLAN, L2QAUD, DSCPAUD
TIA LLDP MED Network Policy (Voice) TLV
L2Q - set to
  • (on) if T is set to 1.
    • L2QVLAN - Set to the VLAN ID in the TLV.
    L2QAUD - Set to the Layer 2 Priority value in the TLV.
    DSCPAUD - Set to the DSCP value in the TLV.
    A check is made as to whether a reset is necessary to obtain a new IP address due to a change in the values of the parameters L2Q or L2QVLAN.
    This TLV is ignored if:
    • The value of USE_DHCP is
    • .
    • The Application Type is not 1 (Voice) or 2 (Voice Signaling).
    • The Unknown Policy Flag (U) is set to 1.
    L2Q, L2QVLAN
    TIA LLDP MED Network Policy (Voice Signaling)
    L2Q - set to
  • (on) if T is set to 1.
    • L2QVLAN - Set to the VLAN ID in the TLV.
    L2QAUD - Set to the Layer 2 Priority value in the TLV.
    DSCPAUD - Set to the DSCP value in the TLV.
    A check is made as to whether a reset is necessary to obtain a new IP address due to a change in the values of the parameters L2Q or L2QVLAN.
    This TLV is ignored if:
    • The value of USE_DHCP is
    • .
    • The Application Type is not 1 (Voice) or 2 (Voice Signaling).
    • The Unknown Policy Flag (U) is set to 1.
    SIP_CONTROLL ER_LIST
    Proprietary Call Server TLV
    SIP_CONTROLLER_LIST will be set to the IP addresses or FQDN in this TLV value.
    Note:
    This parameter cannot be used in an environment where both SIP phones and H.323 phones exist.
    TLSSRVR and HTTPSRVR
    Proprietary File Server TLV
    TLSSRVR and HTTPSRVR will be set to the IP addresses in this TLV value.
    L2Q
    Proprietary 802.1 Q Framing
    If the value of TLV = 1, L2Q is set to
    If the value of TLV = 2, L2Q is set to
    If the value of TLV = 3, L2Q is set to
    A check is made as to whether a reset is necessary to obtain a new IP address due to a change in the values of the parameters L2Q or L2QVLAN.
    This TLV is ignored if:
    • The value of USE_DHCP is
    • .
    • The current L2QVLAN value was set by an IEEE 802.1 VLAN name.
    • The current L2QVLAN value was set by a TIA LLDP MED Network Policy (Voice) TLV.
    POE_CONS_ SUPPORT
    Proprietary - PoE Conservation Level Request TLV
    If the value of POE_CONS_SUPPORT is