LIM: Line Interface Module
TLP11: Trunk Line Protocol (not sure if correct)
TLU83: Trunk Line Unit (83 -> analogue)
ELU34: Extension Line Unit (34 -> analogue)
TMU: Tone and Multiparty Unit
OLP1D: Operators line program, display
OLP1T: Operators line program, traffic
You can use this site for online ALEX documentation (BC11 O_M Library + SP1, SP2, SP3, SP4):
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