This is the latest Implementors' Guide to Recommendation Q.704 (07/96). This document contains the contents of the previous version (12/99, which itself contained the first (03/99) version) of the Implementors' Guide.
This document extends the 03/99 Implementors' Guide, which defined additions to the Service Indicator of values for the Signal Processing Network Equipment User Part (SPNEUP) of Q.55 and the AAL type 2 Signalling Transport Converter on Broad Band MTP of Q.2150.1. It updated the User Part identities used in the User Part Unavailable message (UPU) in line with the Service Indicator values. It reserved in Q.704 the message codes for the extended changeover order and acknowledgement of Q.2210 broad band MTP. It also corrected some editorial errors in the SDL.
The extensions in the 12/99 document consisted of the allocation of a Service Indicator (decimal 13) to the Bearer Independent Call Control MTP User (Q.1901), and another (decimal 14) to the Media Gateway Control Protocol MTP User (H.248).
This document includes all these updates, and in addition clarifies the linkset emergency restart procedures. It also contains the description of the Service Indicator (SI) extension mechanism agreed at the 12/99 meeting. Note that the ITU is considering the deletion of the Data User Part (DUP), of Recommendation X.61/Q.741, so the DUP SIs have been marked "reserved".