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STP Interoperability launched
Specifications for utilizing on-line broadcast information
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This is to inform you that, Service Providers who are connected to the STP central hub on a dial up medium and not on a high speed 2mbps leased line may experience delays in sending/receiving large messages. Some Service Providers have already connected through high speed 2mbps leased lines. Users who have signed up with Service Providers that are not connected with the STP central hub on high speed 2mbps leased lines may take up the matter of delays with their respective Service Providers suitably.


STP Interoperability launched

Shri G N Bajpai, Chairman SEBI, inaugurated the Straight Through Processing (STP) inter-operability framework at NSE premises.

Straight Through Processing (STP) is a process driven mechanism to control all elements of the work flow in a financial transaction that allows electronic capturing and processing of transactions in one pass from the point of origination to settlement.

STP was launched in India in November 2002. STP is currently being used by the market participants on a voluntary basis. Several STP Service Providers have been providing STP service to the market participants; however, there was no inter-operability between the STP Service Providers.

NSE has now set up the STP Central Hub to provide inter-operability between the STP service providers. The STP service providers connect to the STP central hub for the purpose of sending and receiving messages between them. The STP Central Hub facilitates the smooth flow of messages between users of different service providers. With interoperability in place the market participants can avail of the STP services offered by any of the service providers. SEBI has vide its circular no DNPD/Cir-22/04 dated April 1 2004 directed that all the institutional trades executed on the stock exchanges shall be mandatorily processed through the STP System with effect from July 01, 2004.

Shri G N Bajpai launched the STP interoperability and to mark the launch a contract note message was sent by a trading member to an institutional client as per the STP format IFN 515. A delivery instruction for payment message was sent by an institutional client to a custodian as per the STP format IFN 541. The messages were exchanged by the market participants by utilizing the STP services offered by the four service providers, BSE, FT, NSDL and NSE.IT.

June 30, 2004


Specifications for utilizing on-line broadcast information

The Exchange offers Computer-to-Computer Link (CTCL) facility to itís members. The CTCL facility is enabled for the members on payment/approval of the Exchange. However, the Exchange vide circular NSE/CMTR/3896 (NSE/CMO/10 dated January 28,2003) has announced the facility of utilizing on-line broadcast information from the Exchange. The members can utilize the information disseminated by the trading system to build tools for analysis, risk management and decision support for their own trading activities. However, members shall not be permitted to use this for other commercial purposes.

Broadcast specifications document giving technical details for using the broadcast information sent by the trading system namely capital market as well as derivatives is made available to all the members.

As the exchange broadcast traffic is compressed, the library for LZO implementation (decompression) is also made available with the documentation.

The libraries can be built using Microsoft Visual C++ version 6.0. Members can use this zip file ( which contains source, include, examples and documents etc. related to LZO algorithm for building their customized application.