no answer ringing time from outside to inside

[sxzhang23300]

Now I want to modify the unanswered ringing time from outside to inside extension. The gateway is ISR4331, h323 voice gateway. Service aa is enabled on the gateway.

Now the ringing time when no one answers is 1 minute. I want to know where I can modify this ringing time?

In addition, the unanswered ringing time dialed between CUCM internal extensions and extensions is modified under the service parameters, which I have determined. But the ringing time from outside line to extension does not take effect.

网关：h323

CUCM version：12.5

The attachment is 4331 configuration.

[sxzhang23300]

ISR 4331 configuration

[sxzhang23300]

In addition, there is another problem:
When I configured service aa for the first time, I could quickly enter the IVR menu by pressing 0 after the external line came in. However, after a period of time, it will take about 10 seconds to enter the IVR menu after another call from an outside line. And after all the outside calls, press 0 and wait 10 seconds to enter the IVR menu.

If I reconfigure service aa again, the fault disappears. Will appear again after a while

[ShengxiangZhang67519]

Can someone help me