VG224 Ports - No Dial Tone

Unanswered Question
Jul 16th, 2008

Every now and then a customer has a vg224 that the ports will just quit working. No dialtone. The workaround has been to reconfigure a new port and move the device but they will fail again eventually. Whomever set this vg224 up is using a combination og MGCP ports as well as SCCP ports. It seems the MGCP ports are the problem. But, I am running many vg224 with MGCP at many locations with no problems like this. Any suggestions? Thanks in advance.

I have this problem too.
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Paolo Bevilacqua Wed, 07/16/2008 - 04:49

Which exact IOS do you on the vg224 ?

Most mysterious failures are solved with a simple IOS update.

johnnywan Wed, 07/16/2008 - 04:54

There is a stack of 4 vg224s. The two that have the ports in question are running:

vg224 a - Version 12.4(4)T8

vg224 b - Version 12.4(4)T7

Paolo Bevilacqua Wed, 07/16/2008 - 04:58

Hi, the IOS seems current enough, the problem can be due to some data corruption (bug) in which case a reboot would rester the port.

Paolo Bevilacqua Wed, 07/16/2008 - 05:29

Maybe the mix of MGCP and SCCP is making so the system is less stable. Sorry, just a guess.

angelique.devos Wed, 08/06/2008 - 23:15


Have you already been able to solve this problem? I have a customer with the same issue. They too change ports frequently, but their ports will run out eventually... ;-)

My IOS is 12.4(15)T5, using only MGCP.


robertandreu Thu, 08/07/2008 - 09:48

When I run into that issue on a VG224 I put these commands with the port that has no dial tone and it corrects the issue. It is like if the VG224 does not hang up that port when the call is finished.

voice-port 2/0

no supervisory disconnect lcfo


no battery-reversal

Let me know if that helped.

johnnywan Fri, 08/08/2008 - 10:42

I have not been able to determine the root cause of the problem. I ended up replacing the Vg224s with the bad ports. Just crossing my fingers at this point that it won't happen again.

gregory wenzel Tue, 08/19/2008 - 08:35

I have seen the same issue Callmanager

Was registered properely, Stayed busy after punch downs were removed from 66 block.

MGCP Gateway

Vg224 GW ios 12.4(9)T7

After analog phone was removed from port, it cleared on its own a few hours later.


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