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  1.  
  2.  
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  6.  
  7. SECTION 7 - SUPPLEMENTARY SERVICES
  8.  
  9. Recommendation Q.80
  10.  
  11.           INTRODUCTION TO STAGE 2 SERVICE DESCRIPTIONS
  12.                    FOR SUPPLEMENTARY SERVICES
  13.                                 
  14.                             Contents
  15.                                 
  16.  
  17. 1.     Introduction
  18.  
  19. 2.     Cross-references
  20.  
  21. 3.     Relationships among supplementary services
  22.  
  23. Annex I - Cross-reference list of Stage 1 and Stage 2 Recommendations on
  24.           supplementary services 
  25.                                    *
  26.                                     
  27.                                 *     *
  28.                                     
  29. SECTION 7 - SUPPLEMENTARY SERVICES
  30.  
  31. Recommendation Q.80
  32.  
  33.               INTRODUCTION TO STAGE 2 SERVICE DESCRIPTIONS
  34.                        FOR SUPPLEMENTARY SERVICES
  35.  
  36.  
  37. 1.     Introduction
  38.  
  39.        The purpose of this Recommendation is to provide an introduction  to  the
  40. Stage  2   service   descriptions   for   supplementary   services,   given   in
  41. Recommendations Q.81-87.
  42.  
  43. 2.     Cross-references
  44.  
  45.        The work in Recommendations Q.81-87 is  based  on  the  Stage  1  service
  46. descriptions given in the I.251-2570-Series Recommendations (see Annex I). They are 
  47. coordinated with the Stage 2 service  description  for  basic  calls,  given  in
  48. Recommendation Q.71, and were developed according to the  methodology  given  in
  49. Recommendation Q.65.
  50.  
  51. 3.     Relationships among supplementary services
  52.  
  53. 3.1    Call Diversion Services
  54.  
  55.        Recommendation I.252,  2-5, defines a  set  of  supplementary  services
  56. called "Call Diversion Services". This  set  consists  of  the  Call  Forwarding
  57. supplementary services and the Call Deflection supplementary service. This section 
  58. describes how these services relate to each other and describes the different network 
  59. routing techniques which may be used to provide these services. It begins with the 
  60. latter topic.
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  77.  
  78.                                     Annex 1
  79.                                         
  80.                          (to draft Recommendation Q.80)
  81.                                         
  82.                   Cross-reference list of Stage 1 and Stage 2
  83.                   Recommendations on supplementary services  1
  84.                                         
  85.  
  86. Stage 2                                    Based on Stage 1 given in:
  87.  
  88. Q.80 - Introduction to Stage 2 Service                     
  89.        Descriptions for Supplementary
  90.        Services      
  91. Q.81 - Number Identification Supplementary            I.251
  92.        Services
  93.  
  94.  1    Direct Dialling In                      I.251,  1
  95. ( 2)  Multiple Subscriber Number                     I.251,  2
  96.  3    CLIP                                           I.251,  3
  97.  4    CLIR                                           I.251,  4
  98.  5    COLP                                           I.251,  5
  99.  6    COLR                                           I.251,  6
  100. ( 7)  Malicious Call ID                              (I.251,  7)
  101. ( 8)  Sub-Addressing                                 (I.251,  8)
  102.  
  103. Q.82 - Call Offering Supplementary Services           I.252
  104.  
  105. ( 1)  Call Transfer                                  I.252,  1
  106.  2    Call Forwarding Busy                           I.252,  2
  107.  3    Call Forwarding No Reply                       I.252,  3
  108.  4    Call Forwarding Unconditional                  I.252,  4
  109. ( 5)  Call Deflection                                (I.252,  5)
  110.  6    Line Hunting                                   I.252,  6
  111.  
  112. Q.83 - Call Completion Supplementary Services         I.253
  113.  
  114.  1    Call Waiting                                   I.253,  1
  115.  2    Call Hold                                      I.253,  2
  116. ( 3)  CCBS                                           (I.253, .3)
  117.  
  118. Q.84 - Multi-Party Supplementary Services             I.254
  119.  
  120. ( 1)  Conference Calling                             I.254,  1
  121. ( 2)  Three-Party                                    I.254,  2
  122.  
  123. Q.85 - "Community of Interest" Supplementary          I.255
  124.        Services
  125.  
  126.  1    Closed User Group                              I.255,  1
  127. ( 2)  ISDN Networking Services                       (I.255,  2)
  128.        Private Numbering Plan
  129.  
  130. Q.86 - Charging Supplementary Services                I.256
  131.  
  132.  1    Credit Card Calling                            I.256,  1
  133.  2    Advice of Charge                               I.256,  2
  134. ( 3)  Reverse Charging                               (I.256,  3)
  135.  
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  141.  
  142. Q.87 - Additional Information Transfer                I.257
  143.        Supplementary Services
  144.  
  145.  1    User-to-User Signalling                        I.257,  1
  146.  
  147.  
  148.  Parentheses "( )" around a  of a Recommendation number implies
  149.     that the  may not appear in the 1988 CCITT Recommendations.
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