Dialogic 6.2 - Manual (Page 363)

Enabling the R2 Protocol
November 2009 363
Channel Blocking
BSMI provides a mechanism for the Host application to block and
unblock individual channels as well as to receive indication that the
far end has blocked or unblocked a particular channel. Although the
R2 protocol remains “enabled”, a blocked channel is not available for
outbound or inbound calls. The BSMI message sequences for local
blocking and blocking by the network are illustrated in Figure 58 .
Figure 58. Channel Blocking
(1) L4L3mCAS_CHAN_BLOCK
Host
(2) L3L4mCAS_CHAN_BLOCKED
Unblock a channel,
(3) L4L3mCAS_CHAN_BLOCK
(4) L3L4mCAS_CHAN_BLOCKED
Network blocks, unblocks a channel,
(3) L4L3mCAS_CHAN_BLOCK
(4) L3L4mCAS_CHAN_BLOCKED
Block a channel,