BSNL - Kheda telecom District

ATM (Asynchronous Transfer Mode) or PVC (Permanent Virtual Circuit)

(BSNL Circular No. 106-6/99 PHC dated 15.5.2002)

BSNL has set up ATM network with nodes at Delhi, Mumbai, Chennai, Kolkota and Bangalore. Initially Permanent Virtual Circuits (PVCs) will be offered on E1 and E3 ports. Even for sub E1 speeds the customer has to subscribe one E1 port. Similarly for intermediate speeds between E1 and E3, the subscriber has to take an E3 port.

During the experimental phase the following provisional tariff is offered for a period of one year :-

	Registration fee	Rs. 1,000/- (non-refundable)
	Security Deposit	For E1 port Rs. 90,000/- per annum. For E3 port Rs. 3,46,000/- per annum. Payable in advance, annually/quarterly
	Period of Hire	One year, However, if special constructions are involved the minimum period hire shall be three years.
	Connectivity from ATM multiplexer to customer premises	Actual lease line charges as per the applicable tariff shall be leviable.
	Usage Charges	The usage charges are based on the type of service selected by the customer, the speed and the duration of usage. The tariff plan for service nrt–VBR (Non real time variable hit rate) is given below :

TABLE OF RATES (RS./HOUR) FOR nrt- VBR CONNECTIONS FOR NATIONAL TRAFFIC:

Connection
Speed(kbps)

Total usage for various services per month (in Hours)

241-720

121-240

61-120

0-60

Hrs.

512
576
640
704
768
832
896
960
1024
1544
2048

83
88
92
97
101
106
110
115
119
144
170

187
198
207
218
227
239
248
259
268
324
383

291
308
322
340
354
371
385
403
417
504
595

498
528
552
582
606
636
660
690
714
864
1020

For other services the rates of nrt-VBR shall be multiplied with the factors given below. The services available on ATM and the corresponding factors are as under :

	rt– VBR	Factor – 1.1
	CBR	Factor – 1.2

In case of Local Traffic i.e. for distance between two ends of the circuit (PVC) unto 25 km we may use Factor + 0.0909 on the above tariff table.

Note:

	The charges in the table above are for bi-directional symmetric connections. The charges for unidirectional connections shall be 0.6 times of the bi-directional symmetric connection charges.
	The charges for bi-directional asymmetric connection are sum of charge for each direction of the connection as per the calculation of unidirectional connection charges.
	The charges above are for virtual channel connections. For virtual path connections the charges shall be 1.2 times.
	The charges for intermediate speed like 4 mbps, 16 mbps and 34 mbps, the multiplication factor of 2, 4, 8, 11 respectively shall be applied to the rate applicable for 2048 kbps connection speed
	The charges in the table above are for P2P (Point to Point) connection.
	Minimum duration for PVC (Permanent Virtual Circuit) usage is one hour. For a PVC having duration less than one hour and for fraction of an hour the charges for one hour connection would be applied
	The usage per month shall be determined by totaling the usage by customer for various services, determining the category in which it falls and then applying the rates applicable to the usage (in hours) for various services used during the month.
	Minimum Usage Charges	A subscriber shall have to subscribe for minimum usage duration of 60 hours in a month. In case lower usage, charges for minimum usage shall still be payable.
	Miscellaneous Charges	The charges for miscellaneous services such as change in bandwidth of PVC connections, change in VPI (Virtual Path Index) values, activation/deactivation of PVC shall be a fixed amount of Rs.3000 per request per item
		At the time of applying for this services, the customer may intimate the size of the frame, maximum speed at which he desires to send (to define the PCR (Peak Cell Rate), average speed at which he desires to send (to define SCR (Sustained Cell Rate), to help the network administrator define the parameters such as CDVT (Cell Delay Variation Tolerance), MBS (Maximum Burst Size), etc. The customer may also inform the network administrator the category of service required.