Modem/Router settings Causing issues with VOIP

[Juicebox]

So i have the following products 

NH20A - modem 
The white cylinder for the WIFI booster. 

I have been trying to find a setting where I can disable my  "SIP ALG" (Application Layer Gateway). Typically, by default this is enabled. Which is causing issues with VOIP calls that I place on hold. 

The router/modem UI has changed now that I have Fiber internet. On my old Router/modem the UI had more in depth setting that were accessible. including enabling or disabling SIP ALG 

I have spent hours on the phone trying to explain this to the agents, They keep telling me that this setting is automatic and cannot be enabled or disabled, which I know is not true. 

Has anyone else had a similar issue? i am wondering how I can get TELUS to disable this feature 

[TELUS_Support]

Hi @Juicebox - this will be something that maybe our seasoned members have experience with

+@Nighthawk @FuzzyLogic @xray - Are any of you familiar with this? 

[Smario]

Usually this setting ,it is in a  telus business account.

 or

This setting is also found in business routers or VOIP POE  managed switches would also have the SIP ALG Setting.

Power Over Ethernet Managed switch- cisco, tplink, other brands....

[Smario]

A business router or POE Managed switch contains SIP ALG feature