Viking Electronics Answering Machine MLC 24 User Manual

MLC-24  
Telecommunication Peripheral Products  
Message Waiting  
Lamp Controller  
Technical Practice  
March 2, 1998  
Add Message Waiting Lamps for Voice  
Mail....On any Telephone System!  
With Viking’s MLC-24 you can integrate visual  
message waiting indication with nearly any  
phone system...even those phone systems  
which do not support message lamps.  
The MLC-24 is compatible with virtually any  
voice messaging system with “out call” or  
“dispatch” feature. It can also be activated  
manually from a Touch Tone phone. The lamps  
can be reset by the voice mail system or from  
the user’s telephone.  
Commands are sent to the controller via C.O. line or analog PABX/KSU station or trunk  
port. Up to four MLC-24 controllers can be connected to a single line.  
Features  
Applications  
• Each MLC-24 controls up to 24 message  
waiting lamps  
• Voice mail systems that don’t provide message  
waiting voltage  
• Compatible with 90 to 125V message waiting  
phones  
• Remote voice mail systems  
• Staff “In - Out” board  
• Compatible with LED’s or Viking LM-1 or LM-2  
retrofit message waiting lamp kit  
• “Do Not Disturb” lights  
• Displays both steady lamp or flash for urgent  
messages  
Sales...(715) 386 - 8861  
• Expandable in multiples of 24 lamps  
Specifications  
Power: 120V AC/13.8V AC 1.25A, UL listed, adapter provided  
Dimensions: 8.25mm x 160mm x 44mm (8.25” x 6.25” x 1.75”)  
Shipping Weight: 1.36 kg (3 lbs.)  
• Uses existing C.O. lines or analog PABX/KSU  
stations  
• Built in diagnostics to aid installer  
Environmental: 0°C to 32°C (32°F to 90°F) with 5% to 95% non-  
condensing humidity  
Connections: (1) RJ21X male, (1) RJ21X female, (1) RJ11 com  
port  
Made in the U.S.A.  
 
B. Electronic or Digital Phone Installation with LM-2 Message Waiting Lamps  
Station/Trunk Switch - Switch to STATION when  
connecting the "control line" to a C.O. line or an analog  
PABX/KSU station. Switch to TRUNK when connecting the  
"control line" to a dedicated phone or unused (loop start)  
trunk input.  
STATION  
TRUNK  
J2  
J1  
RESET  
COM  
Optional LM-24D  
Reset Button  
Optional LM-12W  
MESSAGE WAITING  
LAMP CONTROLLER  
Green  
Red  
VIKING©  
or  
MODEL MLC-24  
(Fax Back Document 665)  
(Fax Back Document 670)  
NEON  
LED  
RJ21X  
FEMALE  
RJ21X  
MALE  
1
2
3
4
Neon/LED Switch - Switch to LED when using an LED or  
POWER  
LM-2 on a separate pair.  
VIKING ELECTRONICS, INC. HUDSON, WI 54016  
Black  
.75”  
Yellow  
LM-2 (Fax Back Document 660)  
KSU/Digital Phone with LM-2  
1.00”  
RJ21 Male  
Connector  
(not included)  
RJ21 Female  
Connector  
(not included)  
Color  
Pins Color  
Polarity Pins  
Note: Electronic or digital telephones usually require  
a separate dedicated pair for operation of the message  
waiting lamps. When a dedicated pair is used, the  
MLC-24 can provide low voltage for direct operation of  
LED indicators, such as the LM-2.  
+
-
BL/W  
O/W  
G/W  
BN/W  
S/W  
1
2
3
4
5
26  
1
W/BL  
BL/W  
W/O  
O/W  
W/G  
G/W  
W/BN  
BN/W  
LED 1  
+
-
+
-
27  
2
28  
3
LED 2  
LED 3  
BL/R  
O/R  
6
7
+
-
29  
4
LED 4  
G/R  
BN/R  
S/R  
BL/BK  
O/BK  
8
9
10  
11  
12  
+
-
+
-
+
-
30  
5
31  
6
32  
7
W/S  
S/W  
R/BL  
BL/R  
R/O  
O/R  
LED 5  
LED 6  
Programming  
A. Assigning Group Lamp Numbers  
LED 7  
+
-
+
-
+
-
+
-
33  
8
34  
9
35  
10  
R/G  
G/R  
R/BN  
BN/R  
R/S  
S/R  
LED 8  
Color  
Pins  
LED 9  
13  
G/BK  
Additional MLC-24’s can be added for controlling  
up to 96 message waiting lights. Set the dip  
switches as shown below.  
14 BN/BK  
LED 10  
LED 11  
LED 12  
LED 13  
LED 14  
LED 15  
LED 16  
LED 17  
LED 18  
LED 19  
LED 20  
LED 21  
LED 22  
LED 23  
LED 24  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
S/BK  
BL/Y  
O/Y  
GN/Y  
BN/Y  
S/Y  
BL/V  
O/V  
GN/V  
BN/V  
36 BK/BL  
11 BL/BK  
+
-
+
-
+
-
+
-
+
-
+
-
37  
12  
38  
13  
BK/O  
O/BK  
BK/G  
G/BK  
Dip Switch  
Group Number  
Assignment  
1 - 24  
1
2
39 BK/BN  
14 BN/BK  
40  
15  
41  
16  
42  
17  
OFF OFF  
ON OFF  
OFF ON  
ON ON  
BK/S  
S/BK  
Y/BL  
BL/Y  
Y/O  
O/Y  
25 - 48  
49 - 72  
73 - 96  
+
-
43  
18  
Y/GN  
GN/Y  
Unused PABX  
Trunk Input or  
Analog station  
+
-
+
-
+
-
+
-
44  
19  
45  
20  
46  
21  
47  
22  
Y/BN  
BN/Y  
Y/S  
S/Y  
V/BL  
BL/V  
V/O  
O/V  
B. Other Dip Switch Settings  
Dip switch 3 and 4 can be used to set message  
waiting light parameters and operational modes.  
+
-
+
-
48  
23  
49  
24  
V/GN  
GN/V  
V/BN  
BN/V  
1000 foot  
Switch  
Feature  
maximum run  
3
3
ON  
When using hard wired LED’s  
using 26 AWG wire  
OFF Use with LM-1’s, LM-2’s or message  
waiting phones  
25T1  
25R1  
50  
25  
V/S  
S/V  
or  
Control Line  
4
4
ON  
Test pattern or diagnostics  
OFF Normal operation  
Control Phone  
C.O. Line  
 
Operation  
A control phone connected directly to the MLC-24’s “control line” controls the lamps. The "control line" may also be  
connected to a C.O. line, analog PABX/KSU station, or an unused C.O. port.  
One MLC-24 controller can serve 24 different station lamps, plus up to three 24 line status displays (LM-24D or LM-  
12W) for the receptionist(s). Up to four MLC-24’s can be installed on a single extension or line.  
In voice mail applications the “dispatch” or “out-call” feature is used to call the extension assigned to the MLC-24, which  
answers and provides a 500 Hz tone. The voice mail system then sends a three digit DTMF code that specifies the  
status of an individual lamp. For example, a Touch Tone code of “1, 24” would cause lamp 24 to be off, a “2, 24” would  
cause it to be on steady, a “3, 24” would cause it to flash and a “4, 24” would cause it to fast flash. When the three digit  
code is complete, the MLC-24 hangs up. The 3 digit code can also be entered manually from any Touch Tone phone.  
In applications where a ringing extension is not available, the MLC-24 can be programmed to provide talk battery for  
direct connection to an unused trunk input, a standard DTMF phone or the voice mail “dispatch” or “out-call” port, if  
compatible.  
Signaling the MLC-24...  
Enter Digits  
1 + xy*  
A. On Premise Operation  
1. ...to turn lamp OFF at station xy*  
2. ...to turn lamp ON at station xy*  
3. ...to flash a lamp at station xy*  
4. ...to fast flash a lamp at station xy*  
5. ...to turn all lamps OFF  
When the MLC-24 is connected to a station circuit of a  
PABX, the voice mail system or user must first dial the  
station (extension) number connected to the MLC-24’s  
“control line.” The MLC-24 will answer with a steady  
tone. The command codes can then be entered as  
shown in the table to the right.  
2 + xy*  
3 + xy*  
4 + xy*  
1 - 4 + 99  
* xy refers to numbers 1 - 96  
B. Off Premise Operation  
When the MLC-24 is located in a remote facility, the voice mail system or user must call the telephone number of the  
phone line connected to the “control line” of the MLC-24 (J2 Pins 25, 50). The MLC-24 will answer with a steady  
tone. The command codes can then be entered as shown in the table.  
C. Message Waiting Lamp Illumination  
1. Neon Message Waiting Phones and/or LM-1 Modular Message Waiting Lamp Retrofit Kit  
This kit will illuminate when the receiver is on-hook. They will go out when the receiver is off-hook and go on as  
the receiver is returned on-hook. The lamp may be extinguished by an off Touch Tone code or by momentarily  
(.25 - 2 seconds) going off hook.  
2. LM-2 LED Message Waiting Lamp Kit  
This kit will illuminate immediately and remain on until the LM-2 switch is depressed momentarily (.25 - 2  
seconds) or an off Touch Tone code is issued to extinguish the LED.  
3. LED’s  
These will illuminate immediately and remain on until an “off” Touch Tone code is issued to extinguish the LED.  
D. Power Failure  
In the event of AC power failure, the message waiting lamps will not function. All telco operations will operate as  
normal.  
E. Special Features  
1. With switch positions 1 and 3 in the OFF position and 2 and 4 in the ON position, the display will indicate on or  
off hook condition for 24 lines (off-hook = LED is on, on-hook = LED is off). Note: Depress the reset button on  
the MLC-24 after changing switch positions.  
2. With switch positions 2 and 3 in the “off” position and 1 and 4 in the “on” position, the installer can generate a test  
pattern that will aid in the installation. The MLC-24 will turn the lamps on one at a time, then turn them all off.  
This will continue until the switches are placed back into position for normal operation.  
Product Support Line...(715) 386-8666  
Fax Back Line...(715) 386-4345  
Due to the dynamic nature of the product design, the information contained in this document is subject to change without notice. Viking  
Electronics, its affiliates and/or subsidiaries assume no responsibility for errors and/or omissions contained in this information. Revisions of  
this document or new editions of it may be issued to incorporate such changes.  
Fax Back Doc # 675  
Printed in the U.S.A.  
ZF290220 Rev C  
 

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