lldp enable
Interface Ethernet1/7
 description Yealink T31 (305)
 lldp transmit med tlv capability
 lldp transmit med tlv networkPolicy
 network policy voice tag tagged vid 2601
 spanning-tree portfast
 switchport mode trunk
 switchport trunk allowed vlan 2601 
 switchport trunk native vlan 3

undo voice vlan security enable
voice vlan track lldp
lldp enable

interface GigabitEthernet1/0/1
 description Yealink-T31(1-306-01)
 port link-type trunk
 undo port trunk permit vlan 1
 port trunk permit vlan 2601
 port trunk pvid vlan 25
 undo voice vlan mode auto
 voice vlan 2601 enable
 stp edged-port enable