HablI', Su':  labbeH.
Ready to transmit. ST3
("Data transceiving device, attention: prepare to transmit." [ghunchu'wI']) 

ghunchu'wI':  My interpretation of Valkris' line in ST3 as a command to the data-transceiving device ... was confirmed. Apparently the subtitle 'Ready to transmit' is not very good... When I mentioned to Okrand at qep'a' loSDIch that I thought that this was in the form of a 'pet command', he said it was a valid interpretation.

ghogh HablI'            telephone  (n)

ghogh HablI' mI' yIper
What is the telephone number? (TNK)

nav HablI'              FAX (machine) (n)

(Mark Mandel, IMO HQ 5.2:20):  I had been working with Marc Okrand by phone and e-mail during the project [i.e. the Language Lab on the Star Trek: Klingon! CD-ROM], and so I sent him the text of my transliterated Klingon letterhead, asking especially about my word for fax, which at the time was a compound word with no space. He wrote back, approximately, that he liked the idea, but he would prefer to express it as a two-word phrase, nav HablI'; and he also suggested the corresponding ghogh HablI' for telephone. 

SEE ALSO:

rISwI'                  transponder, sonar (n)
QumwI'          communicator (n)
rI'meH qul              beacon (n)
rI'meH wovmoHwI'        beacon (n)

lab                     transmit data (away from a place) (v)
lI'                     transmit data (to a place) (v)
rIS                     signal, emit a signal (v)
rI'                     hail (v)
Qum                     communicate (v)
tlhuD                   emit [energy, radiation] (v)