1. Sami Raatikainen/SCOMS
SCOMS signaling
TOVE ( ):
UNI3.1, implemented and tested
UNI4.0, Q.2931, partly implemented (and tested)
B-ISUP (most common parts implemented)
SCOMS ( ):
N-ISUP, Q.931, and further development from TOVE
Sami Raatikainen/SCOMS

2. Sami Raatikainen/SCOMS
SCOMS signaling
Broadband, Narrow-band
User-to-User, User-to-Network, Network-to Network, public-to-public, private-to-private…
Different protocols, same basic functionalities
Four protocols  four times code  reuse code  signaling framework
Sami Raatikainen/SCOMS

3. Sami Raatikainen/SCOMS
SCOMS signaling
SIGNALING FRAMEWORK
Similar procedures
Unique interface for application part (CC) - Different messages - Same primitives
Reuse state machines
Sami Raatikainen/SCOMS

4. Sami Raatikainen/SCOMS
SCOMS signaling
SIGNALING FRAMEWORK
Call Control
Signaling Protocol
Lower Layer
Protocol independent primitives
Protocol dependent messages
Sami Raatikainen/SCOMS