Cell Relay Archive

[ays@hooked.net (Alan Y. Schaevitz)]

In article <5mh85f$oul$1@dismay.ucs.indiana.edu>, Hong Cho
<hcho@comtekinc.com> wrote:

> I am trying to confirm that what standardized signaling protocols are
used for private/public UNI 4.0, P-NNI 1.0, and Public NNI(B-ICI).
> 
> My understanding is  Q.2931 is used for UNI 4.0 and IISP for P-NNI 1.0.
> I don't know what is used for Public NNI.
> Can anyone verify that ?
Q.2931 defines the signaling standards from ITU-T (CCITT).  It is a
superset of Q.931, the standards for N-ISDN.  It is used as a basis for
UNI Signaling 3.0, 3.1 and 4.0  (the are a subset of Q.2931).  UNI
Signaling 4.0 applies to both private and public networks (UNI signaling
defines both public and private addressing formats).  IISP is a
predecessor of PNNI 1.0 and is totally incompatible with it - there is no
upward compatibility between IISP-enabled switches and PNNI 1.0-enabled
ones.  Public NNI is to be based on SS7 and is under developement while
PNNI (private NNI) 1.0 is a completed spec and can be used by both private
and public networks.  The Finnish public network is the largest in the
world and supports SVCs using PNNI.  AT&T has announced support for SVCs
in its public ATM network but hasn't divulged what protocol it uses (PNNI,
proprietary, or what).
-- 
Alan Y. Schaevitz            There are three types of people in the world,
AYS Associates                 those who can count and those who can't.