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

...port 1024 for UDP and TCP are reserved by IANA and thus should not be used for anything.Yes but your first answer was probably closer to the truth. Even numbers in the range 0-1023 might not actually be used for what the say they are.
Since 1024 is reserved, it shouldn't be used. If it is being used, then the only way to find out for what is by investigating it.

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