Voice starts the message before the contact answers and the message is missed if it isn’t answered right away. Win911 V7 used to wait for a response upon the being answered to start the message. The operators greatly would like this feature to be added back in your current product.
If your SIP server provides an off hook event, WIN-911 will use that to start/restart playback of the greeting. Otherwise, WIN-911 loops the greeting and the user answering may pick up in the middle of playback. To reduce the likelihood of this occuring, you can shorten the greeting message. Assuming the operator recognizes the number calling, they are always free to enter their access code without regard for the greeting prompt - there is no need to wait for the instruction to enter the code to play in its entirety.
Hi There, we have the same problem. We are testing the call-out system with one grandstream connected to the server with the WIN911 and another voip to face a phone line, but we don't think what makes the delay. What is your setup? Did you solve the problem?
On our Win911 implementation we experience an 11 second delay from pick-up to the start of the voice message. It would be very helpful to reduce/remove this.