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CHAPTER 3 NDA-24296
Page 554
Revision 1.0
PA-8TLTR
Tie Line Trunk
PA-8TLTR
Tie Line Trunk
1. General Function
The PA-8TLTR(TLT) circuit card provides eight trunks whose interface can be selected among the
following four types by key setting on a 4-channel basis.
• Loop Dialing (LD)
• Direct Inward Dialing (DID)
• 2-wire E & M
• 4-wire E & M
In addition, programmable PADs, whose value can be adjusted by key setting, are equipped with a 4-wire
E & M interface. Note that a cable, which is connected to the “ODT” connector on the front edge of this
card, is necessary when circuits #4 through #7 are used as 2-wire/4-wire E & M trunks. A typical example
of channel allocation is illustrated in Figure 3-170.
Figure 3-170 Location of PA-8TLTR (TLT) within the System
GTCPU
LC
LC
ODT #0
ODT #3
DID #0
DID #3
I/O Local Bus
Terminal
Terminal
SWINT INT PA-8TLTR MDF
2W/4W
Carrier
Equipment
circuit #0
circuit #3
circuit #4
circuit #7
PRIVATE
NETWORK
PUBLIC
NETWORK
Note:
This diagram shows an example when the PA-8TLTR is used as four 2W/4W E&M and four DID trunks.
In this instance, a flat cable connection is not required.