ZETRON 640 DAPT XTRA, Руководство по установке и ремонту

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Hardware Overview
20 025-9416
Jumper Function Settings Default
JP10 Disables logon password
Enables RAM disk reformat (in conjunction with JP9)
IN -
password
disabled /
reformat
OUT -
password
enabled
OUT
JP11 Sets voice RAM size
A - 32 to 128
KB
B - 256 to
512 KB
A
JP12 System reset
IN - reset
OUT
OUT
JP13 Disables system watchdog
IN - disabled
OUT
IN
JP14 Sets video display (monitor) type
A - VGA
B - TTL mono
A
Note: JP9 and JP10 are used to reformat the RAM disk. Do NOT install both jumpers
unless reformatting is required.
PERIPHERAL MOTHERBOARD
The peripheral board (Part No. 702-9360) integrates the CPU functions of the trunk cards with
those of the radio station section. A ribbon cable interfaces this board (item #4, Figure 2) with the
main processor board. The paging software communicates with the peripheral board processors
through two dual-port RAMs (U29, U30). Each RAM has a unique select address and can be
individually chosen to appear in the I/O map of the system.
Trunk Card Slots
The dual trunk interface board (item #5, Figure 2) (Part No. 702-9361) or the dual trunk 4-wire
audio interface (Part No. 702-9488) installs onto the peripheral motherboard for telco connec-
tions. One dual trunk interface is standard on the Model 640. It installs into J3 and J5 on the peri-
pheral board for trunks A and B. An optional second trunk card can be installed into J2 and J4 for
trunks C and D. These cards interface the telco, PABX, or RF/
µ
wave link trunk equipment to the
paging transceiver through the peripheral motherboard.
Trunk And Radio Station Interface
An RJ21 connector (item #15, Figure 3) on the rear of the peripheral board provides the telco
trunk and radio station external interfaces. This male 50-pin connector facilitates signals for up to
four telco trunks, each following the RJ2DX convention (6-wire modular telco jack), and a radio
station interface for control of up to 16 zones.