Inter-Tel 824 Installation And Field Maintenance Manual

INTER-TEL PRACTICES INSTALLATION 
824 INSTALLATION & MAINTENANCE Issue 1, June 1984 
Power Failure Transfer Alarm  
.? 
./ 
5.04 A warning bell or light may be connected to the power sup- 
ply to notify the user of a power drop. This requires a separate 
power source for the bell or light. 
Refer to Figure 3-7 on page 
3-17. 
Voltage Surge Protection 
5.05 AC voltage surges may make the system malfunction, cause 
misregistration, false logic, and damage to the electronic compo- 
nents. To prevent surges,...

INTER-TEL PRACTICES 
INSTALLATION 
824 INSTALLATION & MAINTENANCE 
Issue 1, 
June 1984 
FIGURE 3-9. 
MAIN DISTRIBUTION FRAME (MDF) PCB 
EXTERNAL FEATURE 
A 3 RS232C INTERFACE: 
n 5 MOH PHONE JACK 
INTERFACE 
LINE SEPARATION CENTRAL OFFICE 
LINE INTERFACE n 6 KEYSiT INTERFACE 
SWITCHES EXT. I- 12 
n 7 
KEYSET INTERFACE ’ 
EXT. 13-24 
Page 3-21  

INTER-TEL PRACTICES 
INSTALLATION 
824 INSTALLATION & MAINTENANCE 
Issue 1, 
June 1984 
Central Processor Unit (CPU) PCB 
5.07 Install the CPU PCB as described below. 
For a photograph, 
refer to Figure 3-10 on the next page. 
(1) Place the Battery Jumper in the position to enable data 
base protection. The jumper must be set from the center 
pin to the pin marked 1. 
(2) Verify that the ON/OFF switch on the power supply is in 
the OFF position. 
(3) Install the CPU PCB with components facing left in the...

INTER-TEL PRACTICES INSTALLATION 
824 INSTALLATION b MAINTENANCE Issue 1, June 1984 
I’ 
FIGURE 3-10. CENTRAL PROCESSOR UNIT (CPU) ECB 
c 
-ED INC 
CLOCK 
WATCHI 
CLOCK 
CLOCK IICATORS 
STATUS 
IOG TIMER 
STATUS 
STATUS 
n I 
DATA WRITE ENABLE/ 
n 4 PROGRAMMING DATA SELECT 
DISABLE SWITCH SWITCHES (6 PL) 
n 2 SYSTEM MODE DATASET/ 
OPERATE SWITCH n 5 BATTERY JUMPER 
n 3 PROGRAMMING INDICATORS 
n 6 RON STORAGE (6 PL) 
(7 PL) 
Paae 
3-33  

INTER-TEL PRACTICES 
INSTALLATION 
824 IlYSTALLATION & MAINTENAESCE Issue 1, June 1984 
Central Office Interface (COI) PCB 
5.08 Two different versions of the CO1 PCB are available. 
One 
has circuitry for two C.O. lines: one has circuitry for four. 
Refer to Figures 3-11, 
3-12 and 3-13 on the following pages. 
5.09 Each circuit may be configured for DTMF or Dial Pulse 
signalling. 
however, DTMF and Dial Pulse signalling may be mixed; 
be aware that not all Central Offices are equipped to 
accept DTMF...

INTER-TEL PRACTICES 
824 INSTAIJATION & MAINTENANCE INSTALLATION 
Issue 1, June 1984 
FIGURE 3-11. 4-COI CENTRAL OFFICE INTERFACE PCB 
 
DTMF/ DIALPULSE 
SELECT SWITCH CKT’S l-4 
LEFT TO RIGHT, RESP. 
: LED INDICATOR!. 
CIRCUIT I 
CIRCUIT 
2 CIRCUIT 3 
CIRCUIT 4 
3dB C.O. LINE 
PAD- CIRCUIT 
* 3dB C.O. LINE 
PAD- CIRCUIT 
- 3dB C.O. LINE 
PAD- CIRCUIT 
- 3dB CaO. LINE 
PAD- CIRCUIT 
DTMF/DlAL PULSE 
GENERATOR I.C. CKT’S l-4 
LEFT TO RIGHT, RESP. Al-l-ENUATION 
2 
ATTENUATION 
3 
ATTENUATION 
4 
Page 3-25  

INTER-TEL PRACTICES INSTALLATION 
824 INSTALLATION & MAINTENANCE Issue 1, June 1984 
. 
“5 
+i 
FIGURE 3-15. 2-CO1 CENTRAL OFFICE INTERFACE PCB 

INTER-TEL PRACTICES 
INSTALLATION 
824 INSTALLATION 6r MAINTENANCE 
Issue 1, June 1984 
FIGURE 3-13. 
CO1 JUMPER PCB 
,. 
I. 
. 
Paqe 3-27  

INTER-TEL PRACTICES INSTALLATION 
824 INSTALIATION & MAINTENANCE Issue 1, 
June 1984 
Key Telephone Interface (KTI) PCB 
5-11 Two different KTI PCBs are available. 
One has circuitry 
for four keysets; one has circuitry for eight. There may be a 
maximum of three KTI PCBs in the system. 
Refer to Figures 3-14 
and 3-15 on the following pages. 
(1) With th e system power off, 
install a KTI PCB in the first 
available slot marked 
4/8KTI with components facing 
left. 
(2) Turn power on. 
All four or eight...

INTER-TEL PRACTICES INSTALLATION 
824 INSTALLATION & MAINTENANCE Issue 1, June 1984 
FIGURE 3-14. 8-KTI KEY TELEPHONE INTERFACE PCB 
A STATION SPEECH PATH FUSE 
t.3 AMP) STATION POWER FUSE 
(1.0 AM PI ED INDIC 
CIRCUIT 
CIRCUIT 
CIRCUIT 
CIRCUIT 
CIRCUIT 
CIRCUIT 
‘CIRCUIT 
,CIRCUIT :A7 -0RS 
Page 3-29