Comdial Executech Model 616, 616b ELECTRONIC KEY SYSTEM Instructions Manual

							Installation 
CHAPTER 2 
INSTALLATION 
IMI 66-037 
MOUNTING CONSIDERATIONS 
KSU Mountinq 
-iC ---i- -i 
The KSU cabinet should be attached vertically to any sturdy, - 
flat, surface. It may be vertically rack mounted if desired. It 
must be located within 6 feet of a properly grounded, three-wire, 
117VAC, electrical outlet. The distance between the KSU and the 
TELCO/PBX jacks must be 25 feet or less as per FCC requirements. 
A nominal distance of 7 feet is recommended. 
v 
Choose a secure, 
dry mounting location with adequate ventilation. 
The temperature range of the location must be within 
32-120 
degrees F (O-49 degrees C). If the mounting surface is damp or 
if it is concrete or masonry material, a backboard must be 
attached to the mounting surface to be used for KSU mounting. 
Suitable mounting backboards are available commercially or can be 
constructed out of l/2-inch plywood cut to size. 
Tools and hardware required for mounting the KSU cabinet include: 
l/4 x l-inch round head wood screws, toggle bolts, or wall 
anchors and fasteners: a screwdriver: an electric drill if 
prepared holes are required; 
and a connecting tool for fastening 
wires to a type-66 connector block. 
1. 
2. 
3. A full scale mounting template is supplied in the KSU packing 
box. Hold or tape this template to the mounting surface, and 
mark the location of the mounting holes on the mounting 
surface as they are located on the template. The KSU 
mounting dimensions are as shown on Figure 1. 
Drill holes in the mounting surface of a proper size to 
accommodate the hardware being used. 
If necessary, prepare 
these holes with inserts, anchors or other attachment devices 
as dictated by the type of mounting surface. 
Attach the KSU to the mounting surface with four (4) screws 
installed,through the KSU mounting flange and into the 
mounting surface holes. Note that the flange holes are 
elongated with an enlargement at one end of the hole. This 
feature allows the mounting screws to be partially installed 
in the mounting surface before the KSU is hung on them. 
19  
						

							Installation IMI 66-037 
10 INCHES 
I I 
Figure 1. KSU Mounting Dimensions 
Tele&?h,o_n$ ge;t, Mount b-q 
i‘i * i .ti-i - -i - 
Place the individual telephone stations as desired and in keeping 
with accepted industry and office standards. 
A telephone station can be wall mounted if necessary. Use a wall 
mounting bracket (part number 701032-056) for this 
purpose. 
CABLE ROUTING 
Cable may be routed concealed or visible as the installation 
location requires. Good engineering practices must be observed 
and all applicable building codes must be adhered to. 
@ The maximum distance allowed from the KSU to the station is 
1500 feet using #24 gauge, twisted-pair cable. 
0 The allowed tip/ring loop resistance is 1900 ohms from the 
jack to the TELCO/PARX equipment. 
20  
						

							Installation 
IMI 66-037 
CONNECTIONS 
Line C.o.n.n.e.ct.ions 
-m-w 
i - - m - ..v ---k-G 
Connection between the KSU and the TELCO or PABX line is via 
four-wire cable and modular plug/jack connection. The maximum 
length of a line cable is determined by the limitations detailed 
above. - 
A-Lead Control 
The KSU inputs of TELCO lines 5 and 6 are configured to detect an 
A-lead (A and Al) control signal when it is applied at the TELCO 
input to the KSU. 
A typical use of A-lead control signal 
detection would find a single-line, non-key system, telephone 
set, modem, data terminal, etc. 
configured for A-lead control and 
connected to the line ahead of the KSU. When the KSIJ detects an 
A-lead control signal on line 5 or 6, 
it causes a busy indication 
to be shown at all key system stations connected to the line. 
Pressing the line select key on a station cannot interrupt the 
externally connected A-lead device unless the system is 
programmed to make the line non-private. 
The A-lead loop 
resistance must not exceed 1500 ohms. 
The A-lead control connections are available at clip terminals 42 
- 43 (line 5) and 47 - 48 (line 6) on the station connector block 
that is connected to 52 of the KSU. 
$a~.en, Connections 
.i.- ._ .- .- _ - ._ .-.&.-. 
Connections between the KSU and the stations are typically via 
two 66M-xx station distribution connector blocks per the 
discussion steps given below. 
Refer to Figures 3 and 4 for 
connection details. Various types of station distribution 
connector blocks are available and may be used in lieu of the 
type 66M-xx connector if desired. 
IMPORTANT NOTE 
THE SYSTEM PROVIDES ONE TIP AND RING PAIR CONNECTED TO 
LINE 1 AS AN EMERGENCY, POWER FAILURE CIRCIJIT. 
THIS 
POWER FAILURE PAIR IS LOCATED AS DETAILED ON FIGURE 3 
AND 4. THE POWER FAILURE PAIR IS ONLY ACTIVE DURING A 
POWER FAILURE. AN INDUSTRY STANDARD, SINGLE-LINE 
TELEPHONE, 
SUCH AS A TYPE 2500, CAN BE CONNECTED TO 
THIS PAIR AND USED TO PROVIDE COMMUNICATIONS CAPABILITY 
SHOULD THE AC POWER TO THE SYSTEM BE INTERRUPTED. 
1. Connect a cable between the KSU connector and the connector 
on the 66M-xx connecting block. 
2. Connect four-wire, twisted-pair cables from the 66M-xx block 
directly to the station or from the 66M-xx block to modular 
RJ14 configuration station jacks. 
21  
						

							Installation IMI 66-037 
The polarity between the individual wires in a 
particular voice or data pair is not critical; however, 
do not connect the voice circuits to the data circuits. 
Doing so will make a pair of stations inoperative. 
. 
3. After making the wiring connections discussed above and 
illustrated in Figures 2, 3 and 4, double check all 
connections and cable routing to insure accuracy. 
Whena serial data printer is used for 
COS printout, connect it to 
clips 41, 42 43, and 44 of station connector block Jl. Transmitted 
data, signal ground, request-to send, and clear-to-send terminations 
are supplied at the connector block by the KSU. Signal levels meet 
RS-232 specifications. A typical connection configuration is as 
illustrated in Figure 3. The maximum distance between the printer 
and the KSU must not exceed 50 feet. When preparing a cable for 
connection to the printer interface connector, refer to the 
manufacturers manual applicable to the printer being interfaced, 
and make the following wiring connections: 
0 Wire the TD line (data to printer from KSU - clip 41) to the 
printer receive data input pin. 
0 Wire the SG line (signal ground - clip 42) to the printer signal 
ground pin. 
e Wire the RTS line (status signal from the 
KSIJ to the printer - 
clip 43) to the printer data-set-ready input pin. 
0 Wire the CTS line (status from printer to 
KSU - clip 44) to the 
printer request-to-send output pin. 
Configure the printer, 
per the manufacturers instructions, to 
receive 7-hit serial data with 2 stop bits and no parity bit. 
Set 
the baud rate for the serial data at 110 or 300 baud. 
The printer 
baud rate setting must match the system baud rate set by COS 
programming. 
The system defaults to a baud rate of 110. 
22  
						

							Installation 
IMI 66-037 
To apply AC power to the KSU, 
connect the AC power cord to a 
properly grounded, three-wire, 117VAC electrical outlet. A 
plug-in, power line surge protector should be installed between 
the KSU power cord and the AC outlet. Many different models of 
surge protectors are commercially available for this purpose. _ 
It is recommended that a grounding wire, 
separate from the three 
wire AC line cord, be used. Some local codes may require this 
use. A ground stud is located at the lower right corner of the 
KSU for this purpose. Wire a #lO or #12, insulated, solid copper 
wire between this ground stud and a reliable earth ground such as 
a metal cold water pipe or a building frame ground. 
Two sets of connection points are available which provide relay 
contact closures for external use. One set provides a relay 
contact closure whenever any of the TELCO lines, connected to the 
KSU, ring. The other set provides a relay contact closure 
whenever system station 17 rings. 
The provided contact closures 
track the ringing pattern in both cases. The contacts are closed 
during the ring on period and are open during the silent period. 
A typical connection to these terminals is illustrated in Figure 
2a (model 616R) and Figure 2b (model 616). 
The function of these 
control terminals can be changed by system programming. Refer to 
the paragraph headed Dia.1 Access Puh1i.c ,A
						

							Installation IMI 66-037 
l----1 CLIP TERM 
I  t-l-- 
I :NST”ERNAL ‘. 24V@ 0.4A MAX 
----- + 
OUTPUT AS 
REQUIRED BY 
RELAY COIL LOW 
A 
VOLTAGE ’ 1 1 
- -.. -- 
POWfLK 
SUPPLY  I 
Y 
AC 
1 
P-t VOLTAGE CLAMPING DIODE 
RECOMMENDED 
C INPUT 
Figure 2a. 
Model 616B External S 
ignalling - Typical Connection 
EXT.TERM.l or3 
- 
KSU 1 
INTERNAL 
SWITCHING 
t--H 
VOLTAGE CLAMPING DIODE 
RECOMMENDED 
INPUT 
Figure 2b. Model 616 External Signalling - Typical Connection 
24  
						

							Installation 
IMI 66-037 
&$ial. &g$.s,z $&& Ad.d.r.es.s+. .&-es Em& 
-cc--- 
@% ~QG& &&&QQ QQJ&, can be programmed to he a PA station port 
instead of a telephone station (see Chapter 4, 
programming details). 
When this is done, Section 2 for 
the audio input of a PA 
amplifier can be connected to this station connection audio pair 
as illustrated in Figure 5. 
The connection must be isolated with 
a 600 ohm to 600 ohm audio matching transformer. 
Terminate the 
audio input of the PA amplifier with a 620 ohm (nominal value) 
resistor. 
0 If station 23 is enabled as a PA station, the Common Audible 
* connection points are automatically reconfigured as PA enable 
terminals. 
The relay contact closure on these terminals occurs 
when PA station 23 is dialed. 
The normal common audible 
function, 
station 
23 as discussed previously, is disabled as long as 
is a PA station. 
l If station 25 is enabled as a PA station, the Station 17 
Audible connection points are automatically reconfigured as PA 
enable terminals. 
The relay contact closure on these terminals 
occurs when PA station 25 is dialed. 
The normal station 17 
audible function, 
as discussed previously, is disabled as long 
as station 25 is a PA station. 
600~~ TO600n(i:i) 
AUDIO 
TRANSFORMER 
TO KSU STATION 
PORT 23 OR 25 IF 
ENABLE IS REQUIRED 
OR TO ANY UNUSED 
STATION PORT IF 
ENA-’ - .- 
NO1 nL ml 0 AUDIO INPUT 
PA SYSTEl 
h 
FOR TO KSU EXTERNAL CONTROL CONNECTION POINTS 
MODEL ON 66M-XX CONNECTOR BLOCK. 
616B l CLIPS 45 & 46 FOR STATION PORT 23 PA ENABLE 
l CLIPS 47 & 48 FOR STATION PORT 25 PA ENABLE 
FOR TO KSU EXTERNAL CONTROL CONNECTION POINTS 
KDEL ON THE SCREW-TYPE TERMINALS. 
l TERMINALS 1 & 2 FOR STATION PORT 23 
. TERMINALS 3 & 4 FOR STATION PORT 25 
Figure 5. 
PA Connections 
27  
						

							Installation IMI 66-037 
A line port can be configured by Class Of Service (COS) 
programming (see Chapter 4) to be an AUXILIARY port. 
As an 
AUXILIARY port, it can be used to couple a station voice path to 
an external device. 
This is done from any allowed station by 
pressing the proper line select key to select the AUXILIARY port. 
DTMF tones or dial pulses can be sent through the auxiliary port- 
as needed. 
If direct access area paging is to be part of the system, connect 
the audio input of a paging amplifier to the KSU line jack 
programmed to be an AUXILIARY port. 
The input impedance of this 
port is approximately 600 ohms. The connection must be isolated 
with a 600-600 ohm audio matching transformer. 
Terminate the 
audio input of the paging amplifier with a 620 ohm (nominal 
value) resistor. 
A tone select, zone-paging amplifier can be 
employed if desired. If used, the zone-select code must be 
dialed after the AUXILIARY port line key is pressed. 
If music on hold is to be part of the 
system connect a KX 
registered music source to the KSTJ input jack (phono jack) 
provided for this purpose. 
approximately 500 ohms. The impedance of this input is 
Level adjustment of the music source may 
be necessary. 
This may be done during system checkout. 
An optional station is available which is equipped with a 14 
station Rusy Lamp Field (BLF). Up to eight BLF stations can be 
connected to the system. 
A BLF station can be connected to any 
odd or even station port in the system per the following 
guidelines. 
@ The installed distance between the KSU and the RLF station must 
be limited to 1000 feet or less. 
@ The data-line paired station port cannot be used as a BLF 
station connection or as a regular station connection. 
Data-line pairing is: 10-11, 12-13, 14-15, 16-17, 18-19, 19-21, 
22-24, and 23-25. 
0 The overload paired station port cannot be used as a BLF 
station connection but can be used as a regular station 
connection. Overload pairing is: 10-12, 11-13, 14-16, 15-17, 
18-20, 19-21, 22-24, and 23-25. 
A port, 
paired in either manner with a BLF station, can be used 
as a PA port if desired. 
28