& btmechfreqs()2
  
  Example: Given a unit #1234 with the following listchannels:
  # -- 	Mode -- 	Frequency -- 	Comtitle
  A 	DR-G 	123 	Title A
  B 	A--- 	234 	Title B
  C 	D-Mb 	345 	Title C
  D 	D--w 	456 	Title D
  E 	D--r 	567 	Title E
  F 	A--- 	678 	Title F
  G 	D--y 	789 	Title G
  H 	A--- 	0 	Title H
 
  > think btmechfreqs(#1234)
  1|123|ac|G,2|234|-|-,3|345|ab|b,4|456|a|w,5|567|a|r,6|678|-|-
  ,7|789|a|y,8|0|-|-