Samsung DCS-408i - Trunk Interface Options and Telephone Connections; MPD;PRS Selection for Trunks; Connecting Telephones

Samsung
DCS-408 & 408i Keyphone System Installation Manual
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MPD/PRS Selection and Installation
NOTE: This feature is available on DCS-408 systems only.
The DCS-408 system has four analogue trunk interface lines. Each trunk interface line has
either a Metering Pulse Detection (MPD) function or a Polarity Reverse Detection (PRS)
function as an option.
When using the MPD function, insert a 12kHz or 16kHz MPD Hybrid chip into the socket of
each trunk interface line and add a capacitor of 4.7nF/400V to both tip and ring.
Trunk Port No. 12kHz /16kHz MPD Hybrid IC 4.7nF/400V Capacitor
Port #1 P101 C102, C103
Port #2 P201 C202, C203
Port #3 P301 C302, C303
Port #4 P401 C402, C403
When using the PRS function, insert a PRS Hybrid chip into the socket of each trunk inter-
face line and short the capacitors of both tip and ring.
Trunk Port No. PRS Hybrid IC Short
Port #1 P101 C102, C103
Port #2 P201 C202, C203
Port #3 P301 C302, C303
Port #4 P401 C402, C403
 Connecting Telephones
WARNING
Always take the following precautions when installing trunks or
telephone lines. Failure to do so may result in death or serious injury.
! Never carry out installation of trunks or telephone lines when there is a storm or when
lightning strikes are possible.
! Do not install a telephone jack in a wet location if the jack is not specially manufactured
for use in a wet location.
! Do not touch telephone lines or interface terminals when they are connected with the
telephone lines.