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| Q.931bis : PICS and abstract test suite for ISDN DSS1 layer 3 - Circuit mode, basic call control conformance testing | 
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| Superseded and Withdrawn components |  
| Number 
 | Title | Status |  
| Q.931bis (02/95) 
 | PICS and abstract test suite for ISDN DSS1 layer 3 - Circuit mode, basic call control conformance testing This Recommendation was never published for technical reasons. It included several diskettes containing PICSs and Abstract test suites Part 1 (user side basic access) and Part 3 (user side primary access) for testing conformance of basic call equipment as per Rec Q.931 (1993)
 | Superseded 
 |  |