DISFE or DACD (Direct Access Code Dialing System) is used for making long distance calls from any public telephone network with a charge card .

 
 

Telephone subscribers who bar long distance calls on thir instrument to protect against misusse and excess billilng. Occasionally need to make long distance calls. DISFE provides a solution for the situation.

Detailed billing is provided to subscribers when bills are issued, creating an apprehension for the users of long distance facility. DISFE address this aspect of the subscribers' need and provides a facility to immediately determine each call's cost and cumulative utilization.

Dynamic long distance barring facility, available to electronic exchange subscribers, is provided to all subscribers through DISFE.

Non-subscribers who are on waiting list can begin availing of long distance service through any local payphone.
 
  • DISFE is primarily meant to enable all registered subscribers to avail
  dynamic STD/ISD control features including self dial of any long distance
  call on the DOT STD/ISD network.
• DISFE can be installed at group dialing center's to serve a number of rural
  exchange areas in order to provide more sophisticated facilities to rural
  subscribers.
• This service investment is very low.
• Safe and secure access by all existing subscribers, who have barred their
  long distance access (STD/ISD) facility. Excess metering complaints and
  revenue leakage on long distance calls are eliminated.
• The service is provided round the clock and provides voice announcement
  prompts and responses.
• The system responds to 16Khz signal or Reversal signal provided by the
  exchange.
• The software is highly user friendly with appropriate option menus and
  interactive dialogue boxes.
• Programming of minimum balance in caller/s credit with Automatic line
  disconnection on reaching minimum balance.
• Detail call reports provided to all users of the system, are clearly identified,
  number and stored in the master computer.
• Adequate security arrangements are made to protect the collected data
  against failures, inadvertent operations and malpratices.
• Built in diagnostic checks for (Off-line and On-line) system performance.
• Multi-level password secutiry to access different databases.
• Freezing the account number in case of repeated error attempts to gain
  access.
• Channel wise reports.
• Information regarding all customers who are the subscribers of the system.
• High degree of reliability and easy maintenance.
 
   
POWER SUPPLY UNIT (SMPS):		  
   
Input
230V, 50Hz AC
(through UPS)
    Output +5V DC @ 2.5 Amps
-5V DC @ 0.1 Amps
+12V DC @ 0.1 Amps
-12V DC @ 0.1 Amps
    Temperature 5 C to 45 C while operating
    Humidity 95% RH Non-condensing
       
    CENTRAL PROCESSING UNIT:
    8 bit Microprocessor based  
    Message memory for voice announcement  
    Program memory  
    System memory  
    Channel memory  
    Announcement Prerecorded digitized message for feed back communication to the user by the system.
       
    LINE INTERFACE UNIT:  
    Configuration Available:  
    Min 2 Incoming lines + 2 Outgoing lines.
    Max 4 Incoming lines + 4 Outgoing lines.
    Lines Used A & B Wire
    Call Answer Sense By Reversal/16Khz on line
    System Access Dialing the A/c number & Password in DTMF Mode.
    System Dialing Pulse/DTMF*

 

NOTE
*For accessing the system DTMF dialing facility is a must. However DISFE can dial out the number either in DTMF/Pulse