V10/vol2/auth/fig10.pic

.nf
.PS
scale=100
box invis ht 176 wid 520 with .sw at 0,0
"\fR\s10\&7. SIREQ\f1\s0" at 464,18
"\fR\s10\&tdktrkp\f1\s0" at 128,30
"\fR\s10\&tdktrkp\f1\s0" at 380,30
"\fR\s10\&tdkp\f1\s0" at 388,158
line -> from 160,160 to 360,160 
"\fR\s10\&5. T_CHG/D_XINIT\f1\s0" at 260,166
line -> from 376,144 to 376,48 
line -> from 128,48 to 128,144 
"\fR\s10\&6. SIREQ\f1\s0" at 452,130 rjust
"\fR\s10\&4. SIREQ\f1\s0" at 124,110 rjust
"\fR\s10\&tdkp\f1\s0" at 140,158
"\fR\s10\&2. CALL\f1\s0" at 56,22
"\fR\s10\&3. ANSWER\f1\s0" at 56,-10
line -> from 8,8 to 96,8 
line -> from 96,40 to 8,40 
line <- from 96,56 to 8,56 
"\fR\s10\&1. CALLMOD\f1\s0" at 60,62
line -> from 408,32 to 520,32 
.PE
.fi