Section 2: PCB Installation and Startup
2-28 Section 2: PCB Installation and Startup Aspila EX Hardware Man-
Tie Line (4TLIU) PCB (Figure 2-14)
The 4TLIU Tie Line PCB is an out band dial type analogue tie line interface PCB. The PCB supports
system connections to either 2-wire (four lead, tip/ring) or 4-wire (eight lead, tip/ring/tip 1/ring 1)
E&M signalling tie lines (determined in Program 10-03). Using switches on the PCB, each circuit type
can be set as Type I, II, III, IV, or V. Each PCB provides:
• 4 4-circuit tie line interfaces
• 4 tie line status LEDs
• 1 PCB status LED
• 1 run/block switch
• 2 straps and 1 switch per circuit to determine the circuit type
A maximum of 16 PCBs per system are allowed, providing 64 tie line trunks and it can be plugged into
any universal slot.
The PCB contains 2 straps and 1 switch. How these items are set determines the type of signaling the
system uses. The type of lines the central office provides the customer determines how these switches
should be set.
! Important !
When a router or multiplexer is connected instead of a trunk, the SG terminal of the router or mul-
tiplexer must be connected to the PBXG and FG grounding terminals on the Aspila EX cabinet.
When a trunk is connected, the PBXG and FG terminals must be connected to Earth. If the PBXG
terminal is not connected correctly, the signal may fail.
Circuit Type
Channel/Circuit Number 1-4
(CN100-CN400)
SWn01
Setting
1
Sn01
Setting
1
Sn02
Setting
1
I I Short Short
II I Open Open
III V Open Short
IV I Open Open
V V Short Short
1
The “n” is the circuit number (1-4) being set.
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