Precondition : Add user 200 to the sipxchange.

Steps :
1. Navigate to System->Dialplan->Emergency dial rule.
2. Emergengy dial rule page is displayed.
3. Edit the values as following :
Enabled : Yes
PSTN prefix : 3
Emergency number : 200
4. Add a existing gateway LG_G and click on OK.

Expected : Should give an error message that extension 200 is already being used. And should not allow to add 200 as Emergency number.

Actual : Allows to add 200 as emergency number without any error.

Observation :1. Dial emergency number 200 from user 200 .
Call ID : 28f1ed2-70306e2c-e4fa68f5@176.25.10.181
482 loop detected message is found in the call flow.
2. Dial emergency number 3200 from user 200.
Call ID : bd4c9577-c8cf99b9-9201c866@176.25.10.181
The call is established successfully.

Attachments : sipx-configuration-sipx-brblab.qantom.int.tar.gz