(gdb) bt
#0  0x000000000044b933 in vmwi_generate (buf=0x0, active=0, type=2, codec=4, name=0xaed0fc "", number=0xaed0a8 "", flags=0) at callerid.c:866
#1  0x00002aaace31bf86 in mwi_send_thread (data=0xaed0fc) at chan_dahdi.c:7455
#2  0x000000000055ddee in dummy_start (data=0xb2c700) at utils.c:1024
#3  0x00002b3c8f0c8317 in start_thread () from /lib/libpthread.so.0
#4  0x00002b3c8ec35d5d in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()
(gdb) frame 0
#0  0x000000000044b933 in vmwi_generate (buf=0x0, active=0, type=2, codec=4, name=0xaed0fc "", number=0xaed0a8 "", flags=0) at callerid.c:866
866                     PUT_BYTE(0x7f);
(gdb) frame 1
#1  0x00002aaace31bf86 in mwi_send_thread (data=0xaed0fc) at chan_dahdi.c:7455
7455            cidlen = vmwi_generate(cidspill, has_voicemail(mtd->pvt), CID_MWI_TYPE_MDMF_FULL,
(gdb) list 7438,7456
7438            cidspill = ast_calloc(1, MAX_CALLERID_SIZE);
7439            if (!cidspill) {
7440                    mtd->pvt->mwisendactive = 0;
7441                    goto quit;
7442            }
7443
7444            /* Determine how this spill is to be sent */
7445            if(mwisend_rpas) {
7446                    mwi_send_state = MWI_SEND_SA;
7447            }
7448
7449            gettimeofday(&timeout_basis, NULL);
7450
7451            x = DAHDI_FLUSH_BOTH;
7452            res = ioctl(mtd->pvt->subs[SUB_REAL].zfd, DAHDI_FLUSH, &x);
7453            x = 3000;
7454            ioctl(mtd->pvt->subs[SUB_REAL].zfd, DAHDI_ONHOOKTRANSFER, &x);
7455            cidlen = vmwi_generate(cidspill, has_voicemail(mtd->pvt), CID_MWI_TYPE_MDMF_FULL,
7456                                                                             AST_LAW(mtd->pvt), mtd->pvt->cid_name, mtd->pvt->cid_num, 0);
(gdb)