How to add Provider to LCR
Go to SETTINGS –> Billing –> LCR
Press on Providers which you need, like it is marked in picture below
You will reach LCR Providers list
Here you can 
Add provider which is selected in dropdown by pressing Add button.
Also you can choose to Use only one provider (Turn off failover): instead of all Providers in the list.
- When option No is selected, during the call if it cannot be establish by first provider then system will try with second one, if it cannot be establish by second provider then system will try with third one and so on.
- When option Yes is selected, during the call will be used just first provider, if call cannot be establish system will not try with any other provider.
Failover provider
You can also assign a failover provider to a LCR if option Use only one provider (Turn off failover): is selected No.
Failover provider is a provider used only in case of emergency. If all the other providers fail (returns FAILED error code) a failover provider is used.
If Provider returns NO ANSWER or BUSY - it means, that call not FAILED.
If you think that NO ANSWER/BUSY == FAILED, then you can use this setting
Warning! Failover Provider will be used without checking rates. You should notice that you can take loss using Failover provider!
