NEC NEAX 2000 IPS Installation Manual page 20

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