SAFETY INSTRUCTIONS
– 4 – NWA-008841-001 Rev.5.0
90ch0001.fm
(23) When installing the BRI/PRI/E1/CCIS/Q-SIG/D
term
interface designated by “SELV” that has the
possibility of being connected to off-premise site, gas tube arrester is required for proper operation.
(a) Installation
When installing the DLC card for providing the D
term
interface that is connected to off-premise
site, use PN-2DLCN/PN-4DLCT card and connect gas tube arrester across the line as shown in
Figure below.
When installing the BRT/PRT/DTI/CCT card for providing the BRI/PRI/E1/CCIS/Q-SIG
interface that is connected to off-premise site, connect gas tube arresters across each transmit and
receive line as shown in Figure below.
PBX
R
T
DLC
G
MDF : Main Distribution Frame
OFF-PREMISE
To D
term
MDF
G
GAS TUBE
ARRESTER
PBX
RA
RB
TA
TB
BRT/PRT/DTI/CCT
G
MDF : Main Distribution Frame
TRANSMIT
RECEIVE
OFF-PREMISE
To Digital
Network
MDF
GAS TUBE
ARRESTER
GAS TUBE
ARRESTER
G
G
OCTOBER/31/2005
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