Toshiba Perception Electronic Business Communications System Installation And Maintenance Manual

							TB 100-8504 
March 25, 1985 Page 1 of 1 
Both the LCD EKT and attendant console require a high volume of control data from 
the central control. If LCD EKTs and an attendant console are connected to the first half of a 
DEKU PCB, one or the other might malfunction during high traffic conditions. 
Therefore, LCD EKTs should not be installed at the following ports: 
I ) If the attendant console is assigned to port number LOOI, do not assign an LCD EKT to 
port numbers LO02, LOO3 or LOO4. 
2) If the attendant console is assigned to port number Ll21, do not assign an LCD EKT to 
port numbers Ll22, Ll23 or Ll24. 
Toshiba America, Inc. 
Telecommunicatmn Systems Division 
2441 Michelle Drive, Tustin, CA 92680 (714) 730.5000 
111 Business Park Drwe, Armonk, N.Y. 10504 (914) 273-l 750 
TSD 85-03-020  
						

							TB 100-8503 
March 1, 1985 Page 3 of 3 
b) The strapping terminal consists of six pins labeled A C D E F andapairof 
insulated shorting bars. The bars can connect two pairs of adjacent pins. Select 
the desired option according to the following table. (Note: The table is printed on 
each DLSU PCB for reference.) 
Battery to Ground Dial Pulse: A-B & E-F 
Loop Dial Pulse: B-C & D-E 
3) Loop Current Detection Level: 
a ) For proper detection of incoming digits, adjustments are required based upon 
the CO line loop resistance. Selections are made using the strapping terminals, 
see Figure 2. 
TB 104-Circuit #1 TB 304-Circuit #3 
TB 204-Circuit #2 TB 404-Circuit #4 
b) The strapping terminal consists of four pins labeled a b c and an insulated 
shorting bar. The bar can connect any pair of adjacent pins. Select the desired 
option according to the following table. 
MOTE: 0 - 8OOQ c-d (least sensitive) 
800 - 1.5KQ b-c (mid sensitive) 
1.5KQ and above 
a-b (most sensitive) 
The CO line loop resistance values are arbitrary and are used as an initial strapping 
guide. If the incoming digits are not being detected properly, move the strapping 
terminal to a different sensitivity position and test for proper operation. 
c) Install the DLSU PCB(s)-one for each group of four circuits-in the slots 
designated TOO - TO7 in the DCEC.  
						

							To: 
Erom: 
Date: 
Subject: 
Open jack set box* 
Remove mute switch wires from switch0 
solder them togetherP tape and store*  MEMORANDUM 
---m--w--- 
Tech Tips 
John Brady 
March 6, 1985 
Headset Hook Switch Control 
Solder two lengths of 
wire to the switch about i foot long- 
Route these wires along the coil cord to the phone. 
Lift mod 
jack and lay the wires at bottom of slot. 
Replace mod jack- 
Route the wires aiong the left side of EKT. 
bottom of hook switch. Solder to top and 
JB:sh