August 1999
Intermediate to advanced
328 pages
8h 50m
English
Content preview from Voice Over IP
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PROPOSAL FOR AN ADAPTATION LAYER
[MCGR98] proposes a scheme to use an adaptation layer between MTP-3 to provide an encapsulation/decapsulation function, and to map between MTP-3 point codes and IP addresses.
There is no interworking of IP and SS7 (that is mapping of functions, by header interpretation). The encapsulation/decapsulation operations imply a tunneling operation. There are no SCCP operations visible in this approach. The idea is for the adaptation layer to emulate either MTP-3 or MTP-2 in the following scenarios:
Figure 10-9. Initiating H.245 operations after receiving the SETUP message
ISUP, TCAP, etc. over MTP-3 or over the adaptation ...