NEC NEAX 2000 IPS Installation Manual page 380

NOTE 2: When the power is on, flip the MB switch to ON (UP position) before plugging/unplugging the
circuit card.
NOTE 3: Set SW0-1 and SW0-2 as follows:
CONDITIONS
SW
0-1
When one CCT
ON OFF
is provided.
When more than
one CCT is pro- ON OFF OFF ON OFF OFF
vided.
NOTE 4: When the PBX is a clock source office, set the SW0-1 and SW0-2 on all the CCT cards mounted
in PIM0 to "OFF".
NOTE 5: Mount the CCT card which receives a source clock signal into PIM0.
NOTE 6: The following two kinds of rate adaptation method are available in 48 Kbps data transmission.
The rate adaptation method must be set to match the rate adaptation of clock source office.
• SW2-3: OFF
1
NOTE 7: This card must be reset after the SW0-3 to SW0-7 switch settings. Set the MB switch to UP and
then DOWN.
CCT0 CCT1
SW SW SW
0-2 0-1 0-2
– –
48 Kbps
1
Data
CCT2 · · · · ·
SW SW
0-1 0-2
– –
• SW2-3: ON
48 Kbps
1
Data
– 364 –
CCT7
REMARKS
SW SW
0-1 0-2
MP card will receive the
– – clock signal from CCT0
at its PLO0 input.
MP card will receive the
clock signal from CCT0
at its PLO0 input, under
normal conditions.
Should a clock failure
OFF OFF
occurs with CCT0, MP
card will automatically
switch to the PLO1 input
which gets clock from
CCT1.
1
PN-24CCTA (CCT)
NWA-008841-001 Rev.5.0
90ch3003.fm