Charging and Accounting Principles for the Use of Signalling System No. 7 - Series D: General Tariff Principles General Tariff Principles - Charging and Accounting Principles for International Telecommunication Services Provided over the ISDN Study Group
Message traffic over the Signalling System No.7 (SS No.7) as defined in the Q-Series Recommendations, falls into two main categories: circuit related (connection orientated); non-circuit related (connectionless orientated).