Messenger Modem®
Page 6
Limited Warranty
Mercury Instruments, warrants The Messenger Modem covered by this manual to be free from de-
fects in material and workmanship under normal use and service of this product. If returned to our
factory, transportation charges prepaid, within 4 years of the original purchase shipment date, Mer-
cury Instruments agrees to repair or replace any parts which its examination reveals to have been
defective due to faulty workmanship or material. All obligations or liabilities on Mercury Instruments
part is to repair or replace warranty instruments, and does not include any other type of claims or
damages, including but not limited to consequential damages following the use or misuse of instru-
ments sold by it. Mercury Instruments reserves the right at any time make to changes, modification
or enhancements to this product without prior notification. This warranty is in lieu of all other warran-
ties, express or implied. No agent is authorized to assume for Mercury Instruments any liability
except as set forth above.
Intrinsic Safety
The Mercury Instruments Messenger Modem is listed by CSA (CUS) for Class I, Div-2, Group D and
Class I, Zone 2, Group IIA hazardous locations when installed in accordance with CSA (CUS) control
drawings.
Line Sharing Note
The messenger modem has been tested for its performance in yielding the phone line when
another phone is picked up. The messenger modem typically surrenders the line in less time than
it takes a telephone handset to reach your ear. The user has to understand that if he does not hear
a dial tone when he picks up the phone, the modem sharing the line was on the line at that mo-
ment. The modem will hang up because he picked up the phone. The telephone company will
not see the modem hang up because another phone has been picked up at the same
time, so it will not provide a new dial tone. All the user has to do is to hang up the phone briefly
and pick it up again and listen for a dial tone. In rare instances, such as when pulse dialing is
used, he may have to repeat the process. (Pulse dialing is like hanging up and picking up the
phone rapidly, so a second phone being picked up cannot be detected until the pulse dialing
ends.)
Battery Warning
Use only Mercury Instruments manufactured battery packs with part numbers as specified on the
certification label or control drawing. Use of third party battery packs voids product warranty, voids
intrinsic safety certifications and may impair safety.
