Subsequent Address Message (SAM)
A message that may be sent in the forward direction following an initial address message, to convey additional called party number information. No new optional parameters are allowed in the subsequent address message.
Parameter
Type
Length (octets)
Message type
F
1
Subsequent number
(Peer-to-peer interworking with an earlier version of ISUP may result in format errors and lead to the release of the call.)
V
3-?
End of optional parameters
O
1