Debug VPM Signal:

sccptest#
*Mar  1 01:19:31.483: [2/0] c2400_report_sig_state: ABCD = 0xC
*Mar  1 01:19:31.483: port 0 changed state new state = 12
*Mar  1 01:19:31.483: htsp_process_event: [2/0, FXSLS_ONHOOK, E_DSP_SIG_1100]fxsls_onhook_offhook htsp_setup_ind
*Mar  1 01:19:31.483: [2/0] get_local_station_id calling num=37335 calling name= calling time=00/00 00:00  orig called=
*Mar  1 01:19:31.495: htsp_process_event: [2/0, FXSLS_WAIT_SETUP_ACK, E_HTSP_SETUP_ACK]fxsls_check_auto_call 
sccptest#
*Mar  1 01:19:32.887: htsp_digit_ready(2/0): digit = 9
sccptest#
*Mar  1 01:19:34.175: htsp_digit_ready(2/0): digit = 1
sccptest#
*Mar  1 01:19:35.887: htsp_digit_ready(2/0): digit = 3
*Mar  1 01:19:36.515: htsp_digit_ready(2/0): digit = 0
sccptest#
*Mar  1 01:19:37.127: htsp_digit_ready(2/0): digit = 4
sccptest#
*Mar  1 01:19:38.655: htsp_digit_ready(2/0): digit = 6
*Mar  1 01:19:39.235: htsp_digit_ready(2/0): digit = 7
sccptest#
*Mar  1 01:19:39.855: htsp_digit_ready(2/0): digit = 7
sccptest#
*Mar  1 01:19:41.147: htsp_digit_ready(2/0): digit = 5
*Mar  1 01:19:42.027: htsp_digit_ready(2/0): digit = 5
sccptest#
*Mar  1 01:19:43.087: htsp_digit_ready(2/0): digit = 3
*Mar  1 01:19:43.095: htsp_process_event: [2/0, FXSLS_OFFHOOK, E_HTSP_PROCEEDING]
sccptest#
*Mar  1 01:19:59.779: [2/0] c2400_report_sig_state: ABCD = 0x4
*Mar  1 01:19:59.779: port 0 changed state new state = 4
*Mar  1 01:19:59.779: htsp_process_event: [2/0, FXSLS_OFFHOOK, E_DSP_SIG_0100]fxsls_offhook_onhook, HF duration Max=1000, HF duration Min=150
*Mar  1 01:19:59.779: htsp_timer - 1000 msec
*Mar  1 01:20:00.779: htsp_process_event: [2/0, FXSLS_OFFHOOK, E_HTSP_EVENT_TIMER]fxsls_offhook_timerhtsp_call_feature:feature 34

*Mar  1 01:20:00.791: htsp_process_event: [2/0, FXSLS_WAIT_RELEASE_REQ, E_HTSP_STOP_RINGING]fxsls_stop_ringing
*Mar  1 01:20:00.791: [2/0] c2400_set_sig_state_intercept: ABCD=4, timestamp=0, sys_time=480079
*Mar  1 01:20:00.791: [2/0] c2400_set_sig_state: ABCD=4, timestamp=0, sys_time=480079
*Mar  1 01:20:00.791: htsp_process_event: [2/0, FXSLS_WAIT_RELEASE_REQ, E_HTSP_RELEASE_REQ]fxsls_waitrls_req_rls
*Mar  1 01:20:00.791: [2/0] c2400_set_sig_state_intercept: ABCD=4, timestamp=0, sys_time=480079
*Mar  1 01:20:00.791: [2/0] c2400_set_sig_state: ABCD=4, timestamp=0, sys_time=480079
sccptest#
*Mar  1 01:20:00.791: [2/0] c2400_set_sig_state_intercept: ABCD=4, timestamp=0, sys_time=480079
*Mar  1 01:20:00.791: [2/0] c2400_set_sig_state: ABCD=4, timestamp=0, sys_time=480079
*Mar  1 01:20:00.791: [2/0] c2400_report_sig_state: ABCD = 0x4
*Mar  1 01:20:00.795: htsp_process_event: [2/0, FXSLS_ONHOOK, E_DSP_SIG_0100]fxsls_onhook_onhook
=============================================

sh call-manager-fallback
CONFIG (Version=9.0)
=====================
Version 9.0
Max phoneload sccp version 17
Max dspfarm sccp version 18
For on-line documentation please see:
http://www.cisco.com/en/US/products/sw/voicesw/ps4625/tsd_products_support_series_home.html

ip source-address XX.XX.XX.XX port 2000
ip qos dscp:
 ef (the MS 6 bits, 46, in ToS, 0xB8) for media
 cs3 (the MS 6 bits, 24, in ToS, 0x60) for signal
 af41 (the MS 6 bits, 34, in ToS, 0x88) for video
 default (the MS 6 bits, 0, in ToS, 0x0) for serviceservice directed-pickup
max-ephones 700
max-dn 600 dual-line
max-conferences 8 gain -6
dspfarm units 0
dspfarm transcode sessions 0
no huntstop
no huntstop channel
huntstop channel 0
cnf-file location: system:
cnf-file option: PER-PHONE-TYPE
network-locale[0] US   (This is the default network locale for this box)
network-locale[1] US
network-locale[2] US
network-locale[3] US
network-locale[4] US
user-locale[0] US    (This is the default user locale for this box)
user-locale[1] US
user-locale[2] US
user-locale[3] US
user-locale[4] US
srst mode auto-provision is OFF
srst ephone template is 0
srst dn template is 0
srst dn line-mode single
time-format 12
date-format mm-dd-yy
timezone 0 Greenwich Standard Time
secondary-dialtone 9
transfer-pattern .T
keepalive 30 auxiliary 30
timeout interdigit 10
timeout busy 10
timeout ringing 180
timeout transfer-recall 0
timeout ringin-callerid 8
timeout night-service-bell 12
caller-id name-only: enable
system message primary SRST ACTIVE
system message secondary SRST ACTIVE
Limit number of DNs per phone:
  12SP: 76
  7902: 76
  7905: 76
  7906: 76
  7910: 76
  7911: 76
  7912: 76
  7920: 76
  7921: 76
  7925: 76
  7931: 76
  7935: 76
  7936: 76
  7937: 76
  7940: 76
  7941: 76
  7941GE: 76
  7942: 76
  7945: 76
  7960: 76
  7961: 76
  7961GE: 76
  7962: 76
  7965: 76
  7970: 76
  7971: 76
  7975: 76
  7985: 76
  anl: 76
  ata: 76
  bri: 76
  CIPC: 76
  vgc-phone: 76
  IP-STE: 76
  6921: 76
  6941: 76
  6961: 76
  6901: 76
  6911: 76
  7926: 76
  6945: 76
  8941: 76
  8945: 76
Log (table parameters):
     max-size: 150
     retain-timer: 15
transfer-system full-consult
transfer-digit-collect new-call
local directory service: enabled.
Extension-assigner tag-type ephone-tag.
========================================== 

call-manager-fallback
 secondary-dialtone 9
 max-conferences 8 gain -6
 transfer-system full-consult
 ip source-address XX.XX.XX.XX port 2000
 max-ephones 700
 max-dn 600 dual-line
 system message primary SRST ACTIVE
 system message secondary SRST ACTIVE
 transfer-pattern .T
 no huntstop