Inter-Tel Microprocessor Key Installation And Maintenance Practices Manual

INTER-TEL PRACTICES 
! 
.d’ DESCRIP 
CONTENTS PAGE 
1:00 INTRODUCTION . .-.I. +‘-:&:. , :, . . . . , , .1-l 
General . . . . . . . . . .--i,;;.;.; :. y.: . . . . . . . . . . .1-l 
Technology . . . . . . ;;I’; -. ., 
. , . . ,t.. iv: _, . . . . . . . . . 
l-l 
Installation . . . . . . .,. . ..+;.. . . . . . . . . . . . . . . . .l-2 
Seurklng . . . . . . . . . . . -.‘;i ..:‘:‘. . . . ; . . . . . . . .l-2 
-. Hardware Descriptlort’.?. .‘;I.. . . . . . . . . . .l-3 
-,y,Speciflcations ,.. .( 
. .,.*>J ,..*)...

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The audio signals 

INTER-TEL PRACTICES 
.*! 1.05 Hardware Description ‘) 
_I ‘i 
The MPK systems consist of the following hardware: 
the Key Service Unit (KSU)-and ,associated PCB’s, 
the system power supply, the multi-line keysets, the 
optional Direct Station Selector/Busy Lamp Field 
(DSWBLF), the optiona\,,Station Message Detail 
Recorder! (SMDR), the opf$on&batteries and the 
connectois. _ 
j;: .I I ‘I 

DES$R,lPTION 
SiXTlON 340-100-100 INTER-TEL PRACTICES 
!j 
( 1 
l Provides computer interface to loop start 
C.O. lines to detect. ring-in and loop 
holding current, to proyjde loop seizures, 
and to send network control signaling in 
either DTMF or dial pulse. 
l DTMF or dial pulse can be selected by 
inserting or removing integrated circuits 
on plug-in sockets. How.ever, INTER-TEL 
sells the,,COU PC6 as either a DTMF or 
dial pulse PCB. 
i ,i 0, Plugs,/@o the MPK/I KSU cardfile slot 
: ,.. marked...

INTER-TEL PRACTICES 
DE&+‘ilbN 
SECTION ?4[)-$@jiiQO 
Issue 3, April 1983 
,) c. Mu’ti-Line Keysets. For MPK/I the maximum 
number of keysets is 16; for MPK/II the maximum 
number of keysets is 32. Any of the various 
keysets can be used on either system in any 
combination. All are interfaced by the STN 
PCB. The keysets are as follows: 
1. Model 1032T Keyset (See Figures l-6 and 
l-7) 
l Ten C.O. line keys each with an LED to 
show the status of a line. 
l A special key, (SPCL) used as an all-page...

DESCRIPTION 
SECTION 340-100-100 
issue 3, April 1983 INTER-TEL PRACTICES 
Three special feature keys (NOT USED 
ATPRESENT). 
These are the last right-most three keys 
on the bottom row. 
By removing the faceplate and the key- 
board, access is gained to the +5VDC 
power voltage setting. This voltage is set 
at the factory prior to shipment. 
AC plug-in wall transformer and cable to 
power DSS/BLF. Not required if modified 
to be powered from the system. 
A reversible baseplate for desk or wall 
mount....

INTER-TEL PRACTICES 
l Connection to the RS-232C interface on the 
CPU PCB requires a 25pin subminiature “D” 
male plug. Connection of an audio source to a 
music-on-hold module requires an l/8” sub- 
miniature phono plug. 
l All necessary plugs and connectors are tele- 
phone industry standard and are available 
from telephone/electronic parts supply distrib- 
utors. 
l Interface to operating company C.O. lines 
utilizes standard quick-connect blocks as the 
demarcation strip. Recommended blocks are...

DESCRIPTION 
SECTION 340-100-100 
issue 3, April 1983 
5. DSS/BLF 30300 
Height - 3.5 in. 
Width - 10 in. 
Depth - 9 in. 
AC power cord - 6 ft. 
DSS/BLF to station cable - 2 ft. straight 
6. Power Supply 
MPK/I 
Height - 6 in. 
Width - 10.25 in. 
Depth - 5.75 in. 
AC power cord - 6 ft. 
DC power cable - 2 ft. 
MPK/II 
Height - 5 in. 
Width - 10 in. 
Depth - 7.25 in. 
AC power cord - 11 ft. 
DC power cable - 2 ft. 
MPK/IA power supply housed in KSU cab- 
inet 
MPK/IIA power supply housed in KSU cab- 
inet...

INTER-TEL PRACTICES 
DSWBLF 
Class 2 wall plug-in transformer, 16 watt 
120VAC primary, 16VAC 0.70 amp second- 
ary. 
3. Central Office Line Protection 
Tip to Ring: 800V transient 
To ground: 1500VAC RMS 
4. Central Office Characteristics 
MPK FCC Registration: BE287V-68377-KF-E 
Ringing Voltage: 45VAC minimum 
Ringer Equivalence: 0.9A REN 
Central Office PCB has no effect on longi- 
tudinal balance. 
0 dB loss from telephone network to C.O. line. 
5. Environmental Requirements 
Ambient Operating...