Ground Start Signaling
November 2009 295
Figure 34. FXO Ground Start - Outgoing Clear Timing Diagram
IISDN SMI MESSAGES: L4L3mCLEAR_REQUEST
L3L4mCLEAR_REQUEST
IISDN TIMERS:
hooktimer_onhook_rls
hooktimer_offhook_inseize
guard_interval_timer
ign_insz_post_rls_timer
hooktimer_onhook_rls
RECEIVE HOOKSWITCH, FXS:
A Bit
B Bit
TRANSMIT HOOKSWITCH, FXO:
A Bit
B Bit (ignored)
NOTE: This diagram is designed to give the reader a general understanding of the sequence of events for this robbed
bit protocol over time. The timers and spacing on thi s graph are not proportional to the actual events that occur.
Revised 10-Nov-98
Revision 1.3
RECEIVED BITS,
TRANSMITTED
Revised
20-Oct-03
Rev 1.4