All types of Trunk Call Booking ( except demand trunk call), Dial 180.

• While booking a Trunk call,provide the destination station phone no. name of the destination station, name of State or District of the called station -- if it is not a well known place, any preference e.g. PP, time etc.
• Please note the Ticket Number and the Booking date and time for ease of Enquiry.

DEMAND TRUNK CALLS : for booking Dial 178

Lightning Calls

• A Lightning Trunk Call can be converted into some other class or cancelled if not put through within one hour of booking.

• Trunk calls rates
• STD codes and outstation phone directory enquiry

Trunk Assistance / Enquiry : Dial 181 Call for

• Keeping all calls pending
• Cancellation of calls
• Addition of PP or 2^nd PP.
• Please mention Trunk ticket number whenever you call
• In any written complaint, please quote the Trunk Call Ticket No. with date(s).In case of any difficulty regarding Trunk service(s), please contact ATS / CTSon duty dial : 22207484 / 22207303

Fixed Time (FT) Calls

• FT Calls are booked only as Urgent calls.
• FT calls are to be booked at least 2 hours before the required time.
• Particular person (PP) facility is not available for FT calls.
• If a Fixed Time call is not set up within 15 minutes of the required time, the caller will have the option to cancel the call without any charges whatsoever or to accept it as a non fixed time call. The class of call may be changed at this stage or later, if so desired, and the usual rules for change of class of calls in case of non-fixed time calls will apply.
• If fixed time call is booked with one called number, an alternate called number can be given in case of No Reply from the called number.
  
• Fixed Time calls shall not take precedence over Lightning calls. They will be offered at the Fixed Time only if no other call of higher priority is pending at the time.
• In case of multiple trunk call requests for a particular time, the FT will be allotted on “first-come first-serve” basis.

Subscription Fixed Time Call (SFT)

• Ordinary Fixed Time calls for at least 5 days in a week ( or 4 days if 2 Telegraph Holidays fall in a week ) may be treated as “ Subscription FT ” calls.
• Rules for Fixed Time Calls also apply to SFT calls.
• If SFT calls cancelled on any day during the period for which it is registered, it is charged fully.
• Written request for SFT calls on weekly basis only should be addressed to :
  Traffic Supdt. (B)
  Calcutta Telephones,
  Telephone Bhavan, 5th floor,
  34, BBD Bag (S)
  Kolkata-700001.
• On Bank or Market holidays the caller is permitted to change the calling number only if the alternative number belongs to the same party.

Demand Calls

• Operator assisted for immediate connection.
  
• These calls are charged as ‘URGENT’ Trunk calls and are connected immediately after verification of the calling party’s Phone number.
• Particular Person (PP) facility is not available on this service.

Reverse Charged (RC) Trunk Calls

• Reverse charged Trunk Call facility is allowed on Trunk Calls only to those numbers registered as Reverse Charged (RC) number.
• On such calls charges are billed to the called party.
• Such calls shall not be available for calls originating from Private Telephones.Reverse Charged Trunk Calls shall be accepted only from Trunk Public Call offices and shall be permitted only to stations and telephone numbers specified in the card of Authority.
• For registration of RC Number, please apply to
  CAOTR (General),
  Calcutta Telephones,
  8, Hare Street, Kolkata-700 001.

Press Trunk Calls (PT)

• Press Trunk Calls can be booked only to Phone Nos. registered as “Press Telephone”.
• Press Trunk Calls are treated at par with other trunk calls of equivalent priority from general public but enjoys a 12.5% rebate on the basic trunk call charges not on International trunk call charges .
• For registration, please apply to
  CAOTR (General),
  Calcutta Telephones,
  8 Hare Street,
  Kolkata-700001.

INTERNATIONAL TRUNK CALLS

• For Booking : Dial 186
  For Enquiry / Operator Assistance : Dial 187
• In case of difficulty in getting “186” or “187” you can call : 22208385 or 26169479
• All pending international trunk calls are treated as cancelled by midnight i.e. at 24:00 HR. of the next calendar day of the day of  Booking in Kolkata.