Cisco IOS Voice Troubleshooting and Monitoring -- Digital Voice-Port Configuration Verification
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After configuring the voice ports on your router, follow these steps to verify proper operation:
Contents |
SUMMARY STEPS
- Check for dial tone.
- Check for DTMF detection.
- show voice port summary
- show voice port
- show running-config
- show controller {t1 | e1} controller-number
- show voice dsp
- show voice call summary
- show call active voice
- show call history voice {last | number | brief}
DETAILED STEPS
1. Pick up the handset of an attached telephony device and check for a dial tone.
2. If you have dial tone, check for DTMF detection. If the dial tone stops when you dial a digit, then the voice port is most likely configured properly for DTMF detection.
3. To identify port numbers of voice interfaces installed in your router, use the show voice port summary command.
4. To verify voice-port parameter settings, enter the show voice port command with the appropriate syntax for your voice interfaces.
5. For digital T1/E1 connections, to verify the codec complexity configuration, enter the show running-config command to display the current voice-card setting. If medium complexity is specified, the codec complexity setting is not displayed. If high complexity is specified, the setting codec complexity high is displayed. The following example shows an excerpt from the command output when high complexity has been specified:
Router# show running-config
.
.
.
hostname router-alpha
voice-card 0
codec complexity high
.
.
.
6. For digital T1/E1 connections, to verify that the controller is up and that no alarms have been reported, and to display information about clock sources and other controller settings, use the show controller command. For output examples, see the show controller Samples.
Router# show controller {t1 | e1} controller-number
7. To display voice-channel configuration information for all DSP channels, enter the show voice dsp' command'. For output examples, see the show voice dsp Samples.
Router# show voice dsp
8. To verify the call status for all voice ports, enter the show voice call summary' command'. For output examples, see the show voice call summary Samples.
Router# show voice call summary
9. To display the contents of the active call table, which shows all of the calls currently connected through the router or concentrator, enter the 'show call active voice' command. For output examples, see the show call active voice Samples.
Router# show call active voice
10. To display the contents of the call history table, enter the show call history voice' command'. To limit the display to the last calls connected through this router, enter the keyword last and define the number of calls to be displayed with the argument number. To limit the display to a shortened version of the call history table, use the keyword brief. For output examples, see the show call history voice Sample.
Router# show call history voice {last | number | brief}
show voice port Samples
In the following sections, output examples of the following types are shown:
- Cisco 3600 series digital E&M voice port
- Cisco AS5300 universal access server T1 CAS voice port
- Cisco 7200 series router digital E&M voice port
Cisco 3600 Digital E&M Voice Port
Router# show voice port 1/0:1
receEive and transMit Slot is 1, Sub-unit is 0, Port is 1
Type of VoicePort is E&M
Operation State is DORMANT
Administrative State is UP
No Interface Down Failure
Description is not set
Noise Regeneration is enabled
Non Linear Processing is enabled
Music On Hold Threshold is Set to -38 dBm
In Gain is Set to 0 dB
Out Attenuation is Set to 0 dB
Echo Cancellation is enabled
Echo Cancel Coverage is set to 8 ms
Connection Mode is normal
Connection Number is not set
Initial Time Out is set to 10 s
Interdigit Time Out is set to 10 s
Region Tone is set for US
Cisco AS5300 Universal Access Server T1 CAS Voice Port
Router# show voice port
DS0 Group 1:0 - 1:0
Type of VoicePort is CAS
Operation State is DORMANT
Administrative State is UP
No Interface Down Failure
Description is not set
Noise Regeneration is enabled
Non Linear Processing is enabled
Music On Hold Threshold is Set to -38 dBm
In Gain is Set to 0 dB
Out Attenuation is Set to 0 dB
Echo Cancellation is enabled
Echo Cancel Coverage is set to 8 ms
Playout-delay Mode is set to default
Playout-delay Nominal is set to 60 ms
Playout-delay Maximum is set to 200 ms
Connection Mode is normal
Connection Number is not set
Initial Time Out is set to 10 s
Interdigit Time Out is set to 10 s
Call-Disconnect Time Out is set to 60 s
Ringing Time Out is set to 180 s
Companding Type is u-law
Region Tone is set for US
Wait Release Time Out is 30 s
Station name None, Station number None
Voice card specific Info Follows:
DS0 channel specific status info:
IN OUT
PORT CH SIG-TYPE OPER STATUS STATUS TIP RING
Cisco 7200 Series Router Digital E&M Voice Port
Router# show voice port 1/0:1 receEive and transMit Slot is 1, Sub-unit is 0, Port is 1 << voice-port 1/0:1 Type of VoicePort is E&M Operation State is DORMANT Administrative State is UP No Interface Down Failure Description is not set Noise Regeneration is enabled Non Linear Processing is enabled Music On Hold Threshold is Set to -38 dBm In Gain is Set to 0 dB Out Attenuation is Set to 0 dB Echo Cancellation is enabled Echo Cancel Coverage is set to 8 ms Connection Mode is normal Connection Number is not set Initial Time Out is set to 10 s Interdigit Time Out is set to 10 s Region Tone is set for US
show controller Samples
In the following sections, output examples of the following types are shown:
- Cisco 3600 series router T1 controller
- Cisco AS5800 universal access server T1 controller
Cisco 3600 Series Router T1 Controller
Router# show controller T1 1/1/0
T1 1/0/0 is up.
Applique type is Channelized T1
Cablelength is long gain36 0db
No alarms detected.
alarm-trigger is not set
Framing is ESF, Line Code is B8ZS, Clock Source is Line.
Data in current interval (180 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Cisco AS5800 Universal Access Server T1 Controller
Router# show controller t1 2
T1 2 is up.
No alarms detected.
Version info of slot 0: HW: 2, Firmware: 16, PLD Rev: 0
Manufacture Cookie Info:
EEPROM Type 0x0001, EEPROM Version 0x01, Board ID 0x42,
Board Hardware Version 1.0, Item Number 73-2217-4,
Board Revision A0, Serial Number 06467665,
PLD/ISP Version 0.0, Manufacture Date 14-Nov-1997.
Framing is ESF, Line Code is B8ZS, Clock Source is Internal.
Data in current interval (269 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
show voice dsp Samples
The following output is from a Cisco 3640 router when a digital voice port is configured.
Router# show voice dsp
TYPE DSP CH CODEC VERS STATE STATE RST AI PORT TS ABORT TX/RX-PAK-CNT
==== === == ======== ==== ===== ======= === == ======= == ===== ===============
C549 010 00 g729r8 3.3 busy idle 0 0 1/015 1 0 67400/85384
01 g729r8 .8 busy idle 0 0 1/015 7 0 67566/83623
02 g729r8 busy idle 0 0 1/015 13 0 65675/81851
03 g729r8 busy idle 0 0 1/015 20 0 65530/83610
C549 011 00 g729r8 3.3 busy idle 0 0 1/015 2 0 66820/84799
01 g729r8 .8 busy idle 0 0 1/015 8 0 59028/66946
02 g729r8 busy idle 0 0 1/015 14 0 65591/81084
03 g729r8 busy idle 0 0 1/015 21 0 66336/82739
C549 012 00 g729r8 3.3 busy idle 0 0 1/015 3 0 59036/65245
01 g729r8 .8 busy idle 0 0 1/015 9 0 65826/81950
02 g729r8 busy idle 0 0 1/015 15 0 65606/80733
03 g729r8 busy idle 0 0 1/015 22 0 65577/83532
C549 013 00 g729r8 3.3 busy idle 0 0 1/015 4 0 67655/82974
01 g729r8 .8 busy idle 0 0 1/015 10 0 65647/82088
02 g729r8 busy idle 0 0 1/015 17 0 66366/80894
03 g729r8 busy idle 0 0 1/015 23 0 66339/82628
C549 014 00 g729r8 3.3 busy idle 0 0 1/015 5 0 68439/84677
01 g729r8 .8 busy idle 0 0 1/015 11 0 65664/81737
02 g729r8 busy idle 0 0 1/015 18 0 65607/81820
03 g729r8 busy idle 0 0 1/015 24 0 65589/83889
C549 015 00 g729r8 3.3 busy idle 0 0 1/015 6 0 66889/83331
01 g729r8 .8 busy idle 0 0 1/015 12 0 65690/81700
02 g729r8 busy idle 0 0 1/015 19 0 66422/82099
03 g729r8 busy idle 0 0 1/015 25 0 65566/83852
Router# show voice dsp
TYPE DSP CH CODEC VERS STATE STATE RST AI PORT TS ABORT TX/RX-PAK-CNT
==== === == ======== ==== ===== ======= === == ======= == ===== ===============
C549 007 00 {medium} 3.3 IDLE idle 0 0 1/0:1 4 0 0/0
.13
C549 008 00 {medium} 3.3 IDLE idle 0 0 1/0:1 5 0 0/0
.13
C549 009 00 {medium} 3.3 IDLE idle 0 0 1/0:1 6 0 0/0
.13
C549 010 00 {medium} 3.3 IDLE idle 0 0 1/0:1 7 0 0/0
.13
C549 011 00 {medium} 3.3 IDLE idle 0 0 1/0:1 8 0 0/0
.13
C549 012 00 {medium} 3.3 IDLE idle 0 0 1/0:1 9 0 0/0
.13
C542 001 01 g711ulaw 3.3 IDLE idle 0 0 2/0/0 0 512/519
.13
C542 002 01 g711ulaw 3.3 IDLE idle 0 0 2/0/1 0 505/502
.13
C542 003 01 g711alaw 3.3 IDLE idle 0 0 2/1/0 0 28756/28966
.13
C542 004 01 g711ulaw 3.3 IDLE idle 0 0 2/1/1 0 834/838
.13
show voice call summary Samples
The following is an output example of show voice call summary on a Cisco 3600 series router digital voice port:
Cisco 3600 Series Router Digital Voice Port
Router# show voice call summary PORT CODEC VAD VTSP STATE VPM STATE ========= ======== === ===================== ======================== 1/015.1 g729r8 y S_CONNECT S_TSP_CONNECT 1/015.2 g729r8 y S_CONNECT S_TSP_CONNECT 1/015.3 g729r8 y S_CONNECT S_TSP_CONNECT 1/015.4 g729r8 y S_CONNECT S_TSP_CONNECT 1/015.5 g729r8 y S_CONNECT S_TSP_CONNECT 1/015.6 g729r8 y S_CONNECT S_TSP_CONNECT 1/015.7 g729r8 y S_CONNECT S_TSP_CONNECT 1/015.8 g729r8 y S_CONNECT S_TSP_CONNECT 1/015.9 g729r8 y S_CONNECT S_TSP_CONNECT 1/015.10 g729r8 y S_CONNECT S_TSP_CONNECT 1/015.11 g729r8 y S_CONNECT S_TSP_CONNECT 1/015.12 g729r8 y S_CONNECT S_TSP_CONNECT
show call active voice Samples
The output from the Cisco 7200 series router is shown below.
Router# show call active voice GENERIC: SetupTime=94523746 ms Index=448 PeerAddress=##73072 PeerSubAddress= PeerId=70000 PeerIfIndex=37 LogicalIfIndex=0 ConnectTime=94524043 DisconectTime=94546241 CallOrigin=1 ChargedUnits=0 InfoType=2 TransmitPackets=6251 TransmitBytes=125020 ReceivePackets=3300 ReceiveBytes=66000 VOIP: ConnectionId[0x142E62FB 0x5C6705AF 0x0 0x385722B0] RemoteIPAddress=171.68.235.18 RemoteUDPPort=16580 RoundTripDelay=29 ms SelectedQoS=best-effort tx_DtmfRelay=inband-voice SessionProtocol=cisco SessionTarget=ipv4:171.68.235.18 OnTimeRvPlayout=63690 GapFillWithSilence=0 ms GapFillWithPrediction=180 ms GapFillWithInterpolation=0 ms GapFillWithRedundancy=0 ms HiWaterPlayoutDelay=70 ms LoWaterPlayoutDelay=30 ms ReceiveDelay=40 ms LostPackets=0 ms EarlyPackets=1 ms LatePackets=18 ms VAD = disabled CoderTypeRate=g729r8 CodecBytes=20 cvVoIPCallHistoryIcpif=0 SignalingType=cas
show call history voice Sample
The following output is for the Cisco 7200 series router.
Router# show call history voice GENERIC: SetupTime=94893250 ms Index=450 PeerAddress=##52258 PeerSubAddress= PeerId=50000 PeerIfIndex=35 LogicalIfIndex=0 DisconnectCause=10 DisconnectText=normal call clearing. ConnectTime=94893780 DisconectTime=95015500 CallOrigin=1 ChargedUnits=0 InfoType=2 TransmitPackets=32258 TransmitBytes=645160 ReceivePackets=20061 ReceiveBytes=401220 VOIP: ConnectionId[0x142E62FB 0x5C6705B3 0x0 0x388F851C] RemoteIPAddress=171.68.235.18 RemoteUDPPort=16552 RoundTripDelay=23 ms SelectedQoS=best-effort tx_DtmfRelay=inband-voice SessionProtocol=cisco SessionTarget=ipv4:171.68.235.18 OnTimeRvPlayout=398000 GapFillWithSilence=0 ms GapFillWithPrediction=1440 ms GapFillWithInterpolation=0 ms GapFillWithRedundancy=0 ms HiWaterPlayoutDelay=97 ms LoWaterPlayoutDelay=30 ms ReceiveDelay=49 ms LostPackets=1 ms EarlyPackets=1 ms LatePackets=132 ms VAD = disabled CoderTypeRate=g729r8 CodecBytes=20 cvVoIPCallHistoryIcpif=0
Verifying Digits Received and Sent on the POTS Call Leg
Once the on-hook and off-hook signaling are verified to be working correctly, verify the correct digits are being received or sent on the digital voice port. A dial peer that does not matched or the switch (CO or PBX) cannot ring the correct station if incomplete or incorrect digits are being sent or received. Some commands that can be used to verify the digits received or sent are:
- show dialplan number-This command is used to show which dial peer is reached when a particular telephone number is dialed.
- debug vtsp session-This command displays information on how each network indication and application request is processed, signaling indications, and DSP control messages.
- debug vtsp dsp-This command displays the digits as they are received by the voice port.
- debug vtsp all-This command enables the following debug voice telephony service provider (VTSP) commands: debug vtsp session, debug vtsp error, and debug vtsp dsp.
show dialplan number
The show dialplan number command displays the dial peer that is matched by a string of digits. If multiple dial-peers can be matched, they are all shown in the order in which they are matched. The output of this command looks like this:
Router# show dialplan number 5000
Macro Exp.: 5000
VoiceOverIpPeer2
information type = voice,
tag = 2, destination-pattern = `5000',
answer-address = `', preference=0,
group = 2, Admin state is up, Operation
state is up,
incoming called-number = `',
connections/maximum = 0/unlimited,
application associated:
type = voip, session-target =
`ipv4:192.168.10.2',
technology prefix:
ip precedence = 5, UDP checksum =
disabled, session-protocol = cisco,
req-qos = best-effort,
acc-qos = best-effort,
dtmf-relay = cisco-rtp,
fax-rate = voice,
payload size = 20 bytes
codec = g729r8,
payload size = 20 bytes,
Expect factor = 10, Icpif = 30,
signaling-type = cas,
VAD = enabled, Poor QOV Trap = disabled,
Connect Time = 25630, Charged Units = 0,
Successful Calls = 25, Failed Calls = 0,
Accepted Calls = 25, Refused Calls = 0,
Last Disconnect Cause is "10 ",
Last Disconnect Text is "normal call
clearing.",
Last Setup Time = 84427934.
Matched: 5000 Digits: 4
Target: ipv4:192.168.10.2
debug vtsp dsp
debug vtsp dsp shows the digits as they are received by the voice-port. The following output shows the collection of DTMF digits from the DSP:
Router# debug vtsp dsp Voice telephony call control dsp debugging is on !-- ACTION: Caller picked up handset and dialed !-- digits 5000. !-- The DSP detects DTMF digits. Digit 5 was !-- detected with ON time of 130msec. *Mar 10 17:57:08.505: vtsp_process_dsp_message: MSG_TX_DTMF_DIGIT_BEGIN: digit=5, *Mar 10 17:57:08.585: vtsp_process_dsp_message: MSG_TX_DTMF_DIGIT_OFF: digit=5, duration=130 *Mar 10 17:57:09.385: vtsp_process_dsp_message: MSG_TX_DTMF_DIGIT_BEGIN: digit=0 *Mar 10 17:57:09.485: vtsp_process_dsp_message: MSG_TX_DTMF_DIGIT_OFF: digit=0, duration=150 *Mar 10 17:57:10.697: vtsp_process_dsp_message: MSG_TX_DTMF_DIGIT_BEGIN: digit=0 *Mar 10 17:57:10.825: vtsp_process_dsp_message: MSG_TX_DTMF_DIGIT_OFF: digit=0, duration=180 *Mar 10 17:57:12.865: vtsp_process_dsp_message: MSG_TX_DTMF_DIGIT_BEGIN: digit=0 *Mar 10 17:57:12.917: vtsp_process_dsp_message: MSG_TX_DTMF_DIGIT_OFF: digit=0, duration=100 Router# debug vtsp session Voice telephony call control session debugging is on !--- <some output have been omitted> !-- ACTION: Caller picked up handset. !-- The DSP is allocated, jitter buffers, VAD !-- thresholds, and signal levels are set. *Mar 10 18:14:22.865: dsp_set_playout: [1/0/0 (69)] packet_len=18 channel_id=1 packet_id=76 mode=1 initial=60 min=4 max=200 fax_nom=300 *Mar 10 18:14:22.865: dsp_echo_canceller_control: [1/0/0 (69)] packet_len=10 channel_id=1 packet_id=66 flags=0x0 *Mar 10 18:14:22.865: dsp_set_gains: [1/0/0 (69)] packet_len=12 channel_id=1 packet_id=91 in_gain=0 out_gain=65506 *Mar 10 18:14:22.865: dsp_vad_enable: [1/0/0 (69)] packet_len=10 channel_id=1 packet_id=78 thresh=-38 act_setup_ind_ack *Mar 10 18:14:22.869: dsp_voice_mode: [1/0/0 (69)] packet_len=24 channel_id=1 packet_id=73 coding_type=1 voice_field_size=80 VAD_flag=0 echo_length=64 comfort_noise=1 inband_detect=1 digit_relay=2 AGC_flag=0act_setup_ind_ack(): dsp_dtmf_mod e()act_setup_ind_ack: passthru_mode = 0, no_auto_switchover = 0dsp_dtmf_mode (VTSP_TONE_DTMF_MODE) !-- The DSP is put into "voice mode" and dial-tone is !-- generated. *Mar 10 18:14:22.873: dsp_cp_tone_on: [1/0/0 (69)] packet_len=30 channel_id=1 packet_id=72 tone_id=4 n_freq=2 freq_of_first=350 freq_of_second=440 amp_of_first= 4000 amp_of_second=4000 direction=1 on_time_first=65535 off_time_first=0 on_time _second=65535 off_time_second=0
If the digits are not being sent or received properly, then it might be necessary to use either a digit-grabber (test tool) or T1 tester to verify that the digits are being sent at the correct frequency and timing interval. If they are being sent "incorrectly" for the switch (CO or PBX), some values on the router or switch (CO or PBX) might need to be adjusted so that they match and can interoperate. These are usually digit duration and inter-digit duration values.
Another item to examine if the digits appear to be sent correctly are any number translation tables in the switch (CO or PBX) that may add or remove digits. Refer to your switch documentation to check the translation tables on your switch.
