Personalized Ring Back Tone (PRBT) for Corporate/Bulk Landline customers  
(1) Who can avail PRBT service?  

 At present the PRBT service is available for the corporate/bulk Landline subscribers of following levels 
(First four/five digits of telephone number) only:

(a) IDGAH TELEPHONE EXCHANGE (EAST AREA): 2352, 2362,2364,2365,2321,23220,2366  
(b) ROHINI TELEPHONE EXCHANGE (NORTH AREA): 2757, 2790, 2791,2792,2793,2794  
(c) KAROL BAGH TELEPHONE EXCHANGE (EAST AREA): 2581, 2582,2585,2587,2872  
(d) SHAKTI NAGAR TELEPHONE EXCHANGE (NORTH AREA) 2711, 2712, 2713, 27411, 27412, 27413, 27414, 
27415, 27416, 27417, 27418, 27419(1-9)/2745, 2746,2724,2725   27443,27445,27446. 2701,2702,27030,
27031,27032,27033, 2704, 2705, 2760,2765 
(e) DWARKA TELEPHONE EXCHANGE (WEST AREA): 2536, 2801, 
28021, 28022,28023, 28024,28025,28041,28042,28043,28044,28050,28051,28052,28053,28054, 25307,25308 
(f) DELHI GATE TELEPHONE EXCHANGE (EAST AREA): 2324,2325,2326,2327,2328,23292  
(g)BHICAJI CAMA PLACE TELEPHONE EXCHANGE (SOUTH AREA): 2610,2612,2613,2614,2615,2616,2617,2618,
2619,2689,2670,26732,26760,26761,26762,26763,26768,2671,2678,2630,2669,2674,2679,26734,26735,26736,
26737,26738,26739,26764,26765,26766,26767,26769  
(h) HAUS KHAS TELEPHONE EXCHANGE (SOUTH AREA):
 29521,29522,29523,29524,29525,29526,29561,29562,29563,29564,29565,29566,29531,29532,29533,29534,
29535,29536,29571,29572,29573,29574,29551,29552,29553,29554,29555,29556,26601,26602,26603  
(i) LODHI ROAD TELEPHONE EXCHANGE (CENTRAL AREA):
 2430,2431,2432,2435,2436,2437,2438,243920,243921,243922,243927,243928,243929,23796,243980,243981  
(j) NEHRU PLACE TELEPHONE EXCHANGE (SOUTH AREA):
 2625,2621,2622,2623,2626,2628,2629,2640,2641,2642,2646,2649,2648,2601,2602,2603,2923,2924,2926

(2) Where subscribers can book for PRBT service?

The Corporate/bulk Landline subscribers can book PRBT service at the Sanchar Haats of their Area.

 (3) What documents are required at the time of booking?

 At the time of booking following is to be submitted by the subscriber:

 (a) PRBT in CD/ Pen Drive

 (b) Copy right certificate duly signed by the authorized signatory of the organization as given below:  

“It is certified that the Song/Tone submitted as PRBT for our MTNL Delhi numbers is the copyright of our organization.”

 (c) List of numbers on which PRBT is to be activated.

 (4) What are the specifications of PRBT?

  The PRBT should be as per below mentioned specifications:

    FORMAT: WAV FORMAT

      BIT RATE: 8 BIT/SEC

      TYPE: MONOPHONIC

      STANDARD FILE SIZE: Up to 400 Kb.

 (5) What are the charges of PRBT service?

 The monthly service charges for PRBT will be @ Rs. 20/- per month per connection/number.