PRI Tariff/BRI Tariff  
I.  Installation and Testing Charges
(i) Wiring Charges up to Network Terminal (NT)
 for Primary Rate Access (PRA)
Rs. 3,000/- (one time charge)
(ii) Wiring Charges up to NT1 for Basic Rate Access (BRA)
In case subscriber provides on its own the initial wiring,
 a further rebate of Rs. 250/-will be admissible
in case of PSTN DELs.
Rs. 300/- (one time charge)
(iii) Subscriber Interface Bus Rs. 500/- (one time charge)
  ISDN Terminals
  Installation and testing charges for ISDN terminals will not be levied in case such equipment
 is purchased and installed by the subscriber on its own
(iv) Ordinary ISDN Phone Rs. 275/- 
(one time charge)
(v) ISDN PC Card Rs. 400/- 
(one time charge)
(vi) ISDN Feature Phone Rs. 550/- (one time charge)
(vii) Terminal Adapter Rs. 475/- (one time charge)
(viii) ISDN PBX per port Rs. 800/- (one time charge)
(ix) G4 Fax Terminal Rs. 6,000/- (one time charge)
(x) Videophone Rs. 1,350/- (one time charge)
II. Monthly Rental for ISDN Equipment (optional)
  Note: These Rates for monthly rental for individual ISDN equipment are valid only if the
equipment is hired from bsnl
(i) Ordinary ISDN Phone Rs. 550 per month
(ii) ISDN PC Card Rs. 800 per month
(iii) ISDN Feature Phone Rs. 1,100 per month
(iv) Terminal Adopter Rs. 950 per month
(v) ISDN PBX per port Rs. 1,600 per month
(vi) G4 Fax Terminal Rs. 12,000 per month
(vii) Videophone Rs. 2,700 per month
III. Monthly Rental for Access
(i) Monthly Rental for Access for PRA As per the plan
(ii) Monthly Rental for Access for BRA As per the plan
V. Rental for Supplementary Services
(i) Direct Dialing in NIL
(ii) Calling Line Identification Presentation(CLIP) NIL
(iii) Line Hunting NIL
(iv) Closed User Group (CUG) NIL
(v) Advice of Charge NIL
(vi) User to User Signaling NIL
The following is the set of seven supplementary services which are supported by all
New Tech switches present in PSYN of BSNL. The facilities are available on free of charge basis>
(i) CLIP
(ii) CLIR
(iii) CW
(iv) TP
(v) MSN
(vi) CH
Besides the above PRIs , the possibility of forwarding the dial digits to the cord nos.
 is available free of charge. This service will be provided on request from customers.

1.ISDN Has emerged as a powerful tool worldwide for provisioning of different services like voice,
data and image transmission over the telephone line through the telephone network.
2.ISDN is being viewed as the logical extension of the digitalization of telecommunication network and
most developed countries are in different stages of implementing ISDN. 

3.An ISDN subscriber can establish two simultaneous independent calls
(except when the terminal equipment is such that it occupies two 'B' channels for one call itself like in video conferencing etc.)
on existing pair of wires of the telephone line (Basic rate ISDN) where as only one call is possible at present on the analog line
 /telephone connection. The two simultaneous calls in ISDN can be of any type like speech, data, image etc.
The call setup time for a call between two ISDN subscribers is very short, of the order of 1 to 2 seconds.
ISDN also supports a whole new set of additional facilities, called Supplementary Services. 


The ISDN subscriber will have full connectivity, nationally, to other analog telephone subscribers.
At present ISDN services are available to and from India for the following countries: 

  • Australia
  • Austria Belgium
  • Canada
  • Denmark
  • France
  • Germany
  • Ireland
  • Italy
  • Israel
  • Japan
  • Malaysia
  • Netherland
  • Norway
  • Phillipines
  • Singapore
  • Switzerland
  • Thailand
  • U.A.E
  • U.S.A 

Services Offered By ISDN

  • Normal Telephone & Fax (G3)
  • Digital Telephone -with a facility to identify the calling subscriber number and other facilities.
  • G4 Fax
  • Data Transmission at 64 Kbps with ISDN controller card
  • Video Conferencing at 128 Kbps
  • Video Conferencing at 384 Kbps (Possible with 3 ISDN lines)
  • ATM (Asynchronous Transfer Mode) or PVC (Permanent Virtual Circuit)

List of ISDN stations of BSNL in India 

Variety of supplementary Services supported by ISDN.

  • Calling Line Identification Presentation(CLIP)
  • Calling Line Identification Restriction(CLIR)
  • Multiple Subscriber Number(MSN)
  • Terminal Portability(TP)
  • Call Hold(CH)
  • Call Waiting(CW)
  • User to User Signaling (UUSI) 

Types of Accesses

There are two types of "accesses" (connections) for ISDN. 
Basic Rate Access(BRA): 2B+D 
  • 2 Channels of 64 Kbps for Speech And Data.
  • 1 Channel of 16 Kbps for Signalling

Primary Rate Access (PRA): 30 B+D
  • 30 Channels of 64 Kbps for speech and data.
  • 1 Channel of 64 Kbps for signalling.