Vodavi Triad 1/2/3 Installation Manual

2-20 KS U Gro unding
KSU Grounding
To e nsur e pr oper sy st em op er at ion and f or s afe ty pur pose s, a good e ar th
ground is required. A metallic COLD water pipe usually provides a reliable
gro und. C arefully che ck that the pip e does not contain insulated joints
tha t c o u ld is o la te t he gro u nd. I n t he ab sen ce o f th e C OL D wa te r pip e, a
ground rod or other source may be used.
A #1 4 in sul ate d A WG or la rge r c oppe r wir e shoul d b e used be twe en t he
gro und sou rce and...

Powe r Line Surge Protection 2-21
Po we r L i n e S u rg e Pr o t e c t i o n
The AC outlet should be equipped with an additional power line
trans ient surge protection d evice. Sy stems using s uch devices are more
re si st ant t o da mage fr om p ower l ine s urge s tha n unpr ot ect ed sys te ms.
Power line surges often occur during switching operations and especially
during viole nt thu nderstorm activ ity.
Ins ta llation of a surge protector meeting the sp ecifica tions des cribed in
the f oll ow pa...

2-22 PCB Inst al l atio n
PCB Installation
PCB Handling & General Installation
Power mus t be turne d off prior to inse rtion or remov al of the PCBs.
The sy st em PC B s con tai n d igi t al c ir c uit r y whi c h, whil e ext r eme ly re li ab le ,
can b e d amag ed by expos ure to excess iv e s ta tic electricity. W hen
handling PCBs, a grounded wrist strap should be used to protect the
boards from static discharge s. Also, use common se nse whe n hand ling
PCBs. For e xample , do not place a PC B in...

PCB I nst alla tion 2 -23
Figure 2-11: PCB Installa tion 

2-24 M ain Pro cesso r B oa rd (MPB ) Inst al l atio n
Main Processo r Bo ard (MPB) Installatio n
The MPB is installed in the right most PCB card slot (slot MPB) of the
BKSU. The MPB contains a lithium dry-ce ll to ma intain m emory a nd
real-time clock functions. The battery is soldered to the MPB and
connected to the circuitry by an On-Off DIP switch. Make sure the DIP
swi tch is O N
be for e the MPB i nst al lat i on.
TheMPBmaybeequippedwiththreedaughterboards:AMEMUfor
mem ory exp ansi on, a MO DU f...

Main Processor Board (MPB) In sta llation 2-25
Before progra mming the sys te m, switch 8 should be p lace d in the ON
position and power cycled off and on to initialize the sy stem databa se to
default. Once the database has been initialized, switch 8 should be
pl aced in th e O FF pos it ion so as to prot e ct t he dat ab ase .
Software for the syste m is contained on two ch ips , labe led U1 and U3.
The MPB is shipped with these chips in place so you should not have to...

2-26 M ain Pro cesso r B oa rd (MPB ) Inst al l atio n
Ph as e Lo ck Loo p Un i t (P LLU)
The PhaseLockedLoopUnit(PLLU)is anoptionboard whichgeneratesa
32.768MHz clock synchronized to 1.544MHz from the T-1 interface board
or int er nal c l oc k. T his boar d i s r eq uir ed when eve r a T -1 c ar d is i nst all e d in
the system. The 32.768MHz clock is provided to CGMD on MPB. It consists
of a P LL c i r cu it , P LL M onit or ing c ir c uit a nd c l oc k (f rom T- 1 int er fac e
board) monitoring...

Main Processor Board (MPB) In sta llation 2-27
Mo dem U ni t (M O D U )
The Modem Unit provides an asy nchronou s mod em for acces s to the
sys te m da ta bas e a nd f ault r e po rt i ng fe at ure s fro m a re mo t e s it e. Th e
Module is optionally installed on the MPB and incorporates a 2400 Baud
modem. The modem may be connected to a pre-selected CO Line
thr ough the s yst em swi tchi ng mat ri x.
ThelocalportmaybeconnectedtoanyCOLineviaanexternalmodem
or to a t er mi nal . T he M ODU por t is i...

2-28 M ain Pro cesso r B oa rd (MPB ) Inst al l atio n
Figure 2-12: MPB w/PLLU and MODU Installation
MODU
P
CO N N5CONN10
CON2 CON1
CON2
CONN9
MPB
R S232C
9PINTER MINAL
9PIN
2(TX)
3(RX)
5(GND)
5(GND) 2(RX)
3(TX)
9PIN 25PIN
2(TX)
3(RX)
5(GND)
5(GND) 3(RX)
2(TX)CON1
CONN6 

Miscellane ous Int erface Unit (M IS U) I nst allation 2 -29
Misce llaneous Inte rface Unit (MISU) Installation
The Miscellaneous Unit (MISU) contains two External Music Sources
(MOH/BGM), an Ext er nal pa ging por t, and four dr y cont act s. Op ti onal l y,
the M I SU is eq uipp ed wit h t wo ser i al int e rfa c e p ort s by i nst al li ng the
Se ri al I nte rf ac e Uni t ( SI U) da ught er bo a rd. Th e S IU sho ul d be ins ta ll ed if
more than two serial communication devices are to be connected to...