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Beginner

IP Phone cannot make internal calls

Hello all

 

Hope someone can help...

We have Cisco 7942 IP Phones.

We can make outgoing calls.
We can receive incoming calls.
We can transfer incoming calls to other internal phones.
We cannot however make internal calls!
When we try the phone rings but no-one can hear anything.

What could it be?

Thanks in advance

 

Everyone's tags (1)
12 REPLIES 12

hi.Can you check the calling

hi.

Can you check the calling search space assigned to IP Phone's directory number?

 

Let me know

 

Regards

 

Carlo

Please rate all helpful posts "The more you help the more you learn"
Cisco Employee

Hi woodlodge, Could you

Hi woodlodge,

 

Could you please check whether Calling Search Space  of 7942 IP phone contains the Partition of the internal phone which you are trying to call ?

OR

You may check the call details record and check where the call is hitting now.

OR

You may run a Dialed Number Analyzer  test and check the  route of the call.

 

HTH,

VKV

 

Beginner

Hi Thanks for the reply.Just

Hi Thanks for the reply.

Just to be clear this is not just one phone.

It is ALL phones to any internal number.

I think it is more likely to be some protocol or firewall issue but have no idea how to diagnose to see what needs to be enabled on the internet gateway.

 

 

Highlighted
Cisco Employee

Hi woodlodge, Is the called

Hi woodlodge,

 

Is the called party able to pick up the call successfully ?

Is this one way no audio or two way no audio issue ?

 

Regards,

VKV

Beginner

HiWhen any party calls

Hi

When any party calls another internally the target handset rings but when answered neither party can here the other.

 

Thanks

Cisco Employee

Hi woodlodge, Was this call

Hi woodlodge,

 

Was this call scenario working before ? or Is this a new implementation ?

 

Regards,

VKV

 

Beginner

It was ok but stopped working

It was ok but stopped working when we changed ISP.  Hence my suspicion regarding protocols etc...

Thanks again

 

Cisco Employee

Hi woodlodge, I suggest, 1.

Hi woodlodge,

 

I suggest,

 

1. Check the call flow using the DNA

2. Understand which endpoint/gateway/CUBE is feeding the call to PSTN

3. Run the test call and let the called party pick up the call

4. Run a command "show call active voice brief" multiple times on the PSTN exit Gateway and see packet count (incoming + outgoing ) has been increasing or not.

4. If packet count is not increasing in regular interval, check the firewall that is facing the ISP and understand whether it is blocking any RTP traffic.

 

Reference :: http://www.cisco.com/c/en/us/support/docs/voice/voice-quality/40309-show-call-act-voice.html

 

Regards,

VKV

 

Beginner

HiThank you so much foryour

Hi

Thank you so much foryour time and effort.

I will do this first thing  when I get into the office later and let you know how we got on.

 

 

Cisco Employee

Hi woodlodge, Did you make

Hi woodlodge,

 

Did you make any progress ? Did you sort out the problem ?

Request you to endorse the suggestion if it helps.

 

Regards,

VKV

 

Beginner

We found a fairly simple

We found a fairly simple solution...
We are replacing the Cisco stations with ones that work.

Thanks anyway

Cisco Employee

Hi woodlodge, Thank you for

Hi woodlodge,

 

Thank you for sharing the information with me. Appreciate it.

You are welcome.

 

Regards,

VKV

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