_______________

_     Fascicle VIII.6 - Rec. X.370

Recommendation X.370
                                 
                  ARRANGEMENTS FOR THE TRANSFER OF
                                 
                INTERNETWORK MANAGEMENT INFORMATION
                                 
                         (Melbourne, 1988)

     The CCITT,

considering

      (a)    that Recommendation X.1 defines the international user
classes of service in public data networks and ISDN;

      (b)    that Recommendation X.2 defines the international user
services and facilities in PDNs and ISDN;

       (c)     that   Recommendation  X.10  defines  the  different
categories  of  access of data terminal equipments  (DTEs)  to  the
different  data  transmission  services  provided  by  public  data
networks (PDNs) and ISDN;

      (d)    that Recommendation X.96 defines call progress signals
including   those  used  in  conjuntion  with  international   user
facilities;

      (e)    that  Recommendations X.20, X.20 bis, X.21, X.21  bis,
X.25,  X.28  and  X.29  already  specify  the  detailed  procedures
applicable to different types of DTE/DCE interfaces on PDNs;

      (f)    that Recommendations X.61, X.70, X.71 and X.75 already
specify  the detailed procedures applicable to call control between
two PDNs on the same type;

      (g)    that  PDNs  may be used to support  CCITT  recommended
services (in particular telematic services);

      (h)   that Recommendation X.200 specifies the reference model
of open system interconnection for CCITT applications;

      (i)    that  Recommendation X.213 defines the  Network  Layer
service of open systems interconnection for CCITT Applications;

     (j)   that interworking with Common Channel Signalling Network
(CCSN)  needs  to  be considered, in view of the  requirements  for
transferring operational information between Administrations;

      (k)    the  need that DTEs can communicate through  different
networks,  and  through different interworking  conditions  between
networks;

      (l)    the  need for general principles and arrangements  for
interworking between public data networks and between  public  data
networks and other public networks;

     (m)   the need, in particular:

      -   for  certain  user facilities and network  utilities  for
communication   through   the   national   networks   between   the
internationally defined data terminal equipment interface protocols
and international inter-exchange control and signalling procedures;

      -   for certain internationally defined network utilities for
international operation of public data networks;

      -   for  compatibility and uniformity in the  principles  for
realization of international user facilities and network  utilities
in public data networks,

unanimously recommends

      that  general  principles and arrangements  for  interworking
between  public data networks and between public data networks  and
other public networks, and that the necessary elements:

       -    for  arrangements  for  the  transfer  of  internetwork
management  information be in accordance with  the  principles  and
procedures specified in this Recommendation.
                                 
                             CONTENTS

1     General  conditions for transferring internetwork  management
information

2    Detailed arrangements at the Network Layer for the transfer of
internetwork management information

3     Detailed arrangements at the Transport Layer for the transfer
of internetwork management information

4    Detailed arrangements at the Session Layer

5    Detailed arrangements at the Presentation Layer

6    Detailed arrangements at the Application Layer

      Arrangements  for  the  transfer of  internetwork  management
information.

1     General  conditions for transferring internetwork  management
information

      The transfer of internetwork management information of public
data networks should be done in accordance with the reference model
for  OSI  applications defined by CCITT, as illustrated in  Figures
1/X.370 and 2/X.370.
                                 
                                 
                   Figure 1/X.370 - T0706770-88
                                 
                                 
                                 
                                 
                                 
                                 
                   Figure 2/X.370 - T0706780-88
                                 
                                 
                                 
                                 

2    Detailed arrangements at the network layer for the transfer of
internetwork management information

      The  OSI services considered at the network layer conform  to
Recommendation X.213.

      To access those OSI services, protocols at the physical, link
and  network layers depend on the networks involved in the transfer
of  management information. The exact protocols to be used  are  as
specified in the previous section of this Recommendation.

3     Detailed arrangements at the transport layer for the transfer
of internetwork management information

      The OSI services considered at the transport layer conform to
Recommendation X.214.

      The  protocol to be used at the transport layer  conforms  to
Recommendation X.224.

      The  exact  characteristics of the transport  layer  protocol
(i.e.  class of transport protocol, etc.) applying to the  transfer
of management information, are for further study.

4    Detailed arrangements at the session layer

     For further study.

      The  OSI services considered at the session layer conform  to
Recommendation X.215.

      The  protocol  to  be used at the session layer  conforms  to
Recommendation X.225.

      The exact characteristics of the services and protocol at the
session  layer, applying to the transfer of management information,
are for further study.

5    Detailed arrangements at the presentation layer

     For further study.

6    Detailed arrangements at the application layer

     For further study.