Why is the busy tone heard when i pick up the phone

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The possible reasons are:

-The license is not correctly installed.
To use the voice PBX function, apply for and install a commercial license. Run the display license state command to verify that the license status is normal.

-No valid PBX user is configured.
Ensure that the PBX device identifier and PBX user identifier are correctly configured. For details, see the Configure the PBX User in the voice configuration manual.

-The DSP resources are insufficient.
Run the display voice dsp-dimm state { slot/dsp-index | channel slot/dsp-index/channel } command. The idle item in the command output shows the remaining DSP resources. For example:
NOTE:
For V200R002C00 and earlier versions, run the display voice dsp-dimm state { slot/dsp-index | channel slot/dsp-index/channel } command to view the usage of DSP resources. For versions later than V200R002C00, run the display voice dsp state { slot/dsp-index | channel slot/dsp-index/channel } command to view the usage of DSP resources. The following uses a version earlier than V200R002C00 as an example:

display voice dsp-dimm state 15/0 Symbol: 0-idle $-G.711 busy A-All busy W-Wastage X-fault @-IP loopback *-PCM loopback #-prohibited Channel NO. DSP channel state ----------------------------------------------------------------------

0000-0049 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000

0050-0099 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000

0100-0149 00000 00000 00000 00000 00000 000

Total:

128 DSP channel

128 idle, 0 G.711 Busy, 0 All Busy, 0 Wastage, 0 Fault,

0 IP loopback, 0 PCM loopback, 0 prohibited
In the preceding information, 128 idle indicates that 128 DSP channels are idle and the current DSP resources are sufficient.
If the fault persists, contact Huawei technical support personnel.

Other related questions:
Why is the busy tone heard when i pick up the phone
The possible reasons are: -The license is not correctly installed. To use the voice PBX function, apply for and install a commercial license. Run the display license state command to verify that the license status is normal. -No valid PBX user is configured. Ensure that the PBX device identifier and PBX user identifier are correctly configured. For details, see the Configure the PBX User in the voice configuration manual. -The DSP resources are insufficient. Run the display voice dsp-dimm state { slot/dsp-index | channel slot/dsp-index/channel } command. The idle item in the command output shows the remaining DSP resources. For example: NOTE: For V200R002C00 and earlier versions, run the display voice dsp-dimm state { slot/dsp-index | channel slot/dsp-index/channel } command to view the usage of DSP resources. For versions later than V200R002C00, run the display voice dsp state { slot/dsp-index | channel slot/dsp-index/channel } command to view the usage of DSP resources. The following uses a version earlier than V200R002C00 as an example: display voice dsp-dimm state 15/0 Symbol: 0-idle $-G.711 busy A-All busy W-Wastage X-fault @-IP loopback *-PCM loopback #-prohibited Channel NO. DSP channel state ---------------------------------------------------------------------- 0000-0049 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 0050-0099 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 0100-0149 00000 00000 00000 00000 00000 000 Total: 128 DSP channel 128 idle, 0 G.711 Busy, 0 All Busy, 0 Wastage, 0 Fault, 0 IP loopback, 0 PCM loopback, 0 prohibited In the preceding information, 128 idle indicates that 128 DSP channels are idle and the current DSP resources are sufficient. If the fault persists, contact Huawei technical support personnel.

Why busy tone is heard after the phone is picked up
The reasons for busy tone after offhook are as follows: - The license is not correctly installed. The voice function requires the license. Apply for and install the commercial license file before using the voice function. You can run the display license state command to check whether the license is in normal state. - No PBX user is configured. This problem occurs if the device or user identifier of the PBX is not configured correctly. Therefore, ensure that device and user identifiers are correctly configured. - DSP resources are insufficient or the DSP module is not installed. Run the display voice dsp state { slot/dsp-index | channel slot/dsp-index/channel } command to check the value of the Idle parameter. (Note: In V200R002C00 and earlier versions, run the display voice dsp-dimm state { slot/dsp-index | channel slot/dsp-index/channel } command to check DSP resource usage. A later version of V200R002C00 is used as an example.) display voice dsp state 0/0 Symbol: 0-idle $-G.711 busy A-All busy W-Wastage X-fault @-IP loopback *-PCM loopback #-prohibited Channel NO. DSP channel state ---------------------------------------------------------------------- 0000-0035 00000 00000 00000 00000 00000 00000 00000 0 Total: 36 DSP channel 36 idle, 0 G.711 Busy, 0 All Busy, 0 Wastage, 0 Fault, 0 IP loopback, 0 PCM loopback, 0 prohibited The preceding information shows that there are 36 idle states, indicating that DSP resources are sufficient. If the fault persists, contact Huawei technical support personnel.

Why the busy tone is heard after dialup
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Why is the busy tone played after I dial a phone number
(Versions later than V200R002C00) The possible reasons are: -The local call prefix is not correctly configured. When you call a local phone number, the busy tone indicates the local call prefix is not configured or incompletely configured. Ensure that the following mandatory parameters of the call prefix are configured correctly: call-type, digit-length, and prefix. -The called party's number does not exist. You can run the display voice pbxuser or display current-configuration command to check the existence of the called user or configuration integrity. For a POTS user, mandatory pbxuser parameters port and telno must be set correctly. For a SIPUE user, mandatory pbxuser parameters sipue and telno must be set correctly. -The called party has configured the call restriction services. Run the display voice pbxuser or display current-configuration command to verify that the called party has configured the call restriction services such as call rejection and selective call acceptance. If the fault persists, contact Huawei technical support personnel. (V200R002C00 and earlier versions) The possible reasons are: -The local call prefix is not correctly configured. When you call a local phone number, the busy tone indicates the local call prefix is not configured or incompletely configured. Ensure that the following mandatory parameters of the call prefix are configured correctly: enterprise, dn-set, centrex, prefix, call-type, maximum-length, and minimum-length, and the enterprise, dn-set, and centrex are consistent with planned information about the calling and called parties. -The called party's number does not exist. Run the display voice dialno or display current-configuration command to verify that the called party exists and the mandatory parameters of dialno including pbxuser, port, and dn-set are configured. -The called party has configured the call restriction services. Run the display voice dialno or display current-configuration command to verify that the called party has configured the call restriction services such as call rejection and selective call acceptance. If the fault persists, contact Huawei technical support personnel.

Why cannot the ringback tone be heard when the U1930 interworks with a carrier's device
If the trunk bearer is configured, the ringback tone from the carrier side cannot be heard. You need to check system settings and set the peerringback parameter to yes. config modify tgld callsourceno <0-255> officeno <0-254> protocol prefix [peerringback ] peerringback: indicates whether to receive the ringback tone from the peer end. Receiving the ringback tone from the peer end is a fixed setting for the R2 trunk.

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