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what is port 13120 for? voice related?

Hi forum,

the below access-list is for my voice qos settings. I cannot find the purpose of why using tcp port 13120?

from www.iana.org, port 13120 is unassigned, is the configuration by mistake, it is configured by my vendor.

Thanks much,

PN

# 12754-13159 Unassigned

=========================================

access-list 102 permit udp 192.168.254.0 0.0.0.255 any range 16384 37276

access-list 102 permit udp any any range 16384 37276

access-list 102 permit udp 172.23.127.0 0.0.0.31 any range 16384 37276

access-list 102 permit udp 172.23.191.0 0.0.0.31 any range 16384 37276

access-list 102 permit udp 172.23.255.0 0.0.0.31 any range 16384 37276

access-list 102 permit udp 172.19.255.0 0.0.0.31 any range 16384 37276

access-list 103 permit tcp 192.168.254.0 0.0.0.255 eq 1720 any

access-list 103 permit tcp any 192.168.254.0 0.0.0.255 eq 1720

access-list 103 permit tcp 192.168.254.0 0.0.0.255 eq 13120 any

access-list 103 permit tcp any 192.168.254.0 0.0.0.255 eq 13120

access-list 103 permit tcp 172.23.127.0 0.0.0.31 eq 1720 any

access-list 103 permit tcp 172.23.191.0 0.0.0.31 eq 1720 any

access-list 103 permit tcp 172.23.255.0 0.0.0.31 eq 1720 any

access-list 103 permit tcp 172.19.255.0 0.0.0.31 eq 1720 any

access-list 103 permit tcp any 172.23.127.0 0.0.0.31 eq 1720

access-list 103 permit tcp any 172.23.191.0 0.0.0.31 eq 1720

access-list 103 permit tcp any 172.23.255.0 0.0.0.31 eq 1720

access-list 103 permit tcp any 172.19.255.0 0.0.0.31 eq 1720

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