Text From Call Queue Direct Number

I am a full-access manager for 3 call queues that are set up with their own direct lines. I do not know how to respond to these text messages. I read online at this article (https://community.ringcentral.com/questions/89895/call-queue-texting.html) that you can log into a call queue, but this seems cumbersome. I wish to have the ability to text from the direct line of the call queues that I am a full access manager for. Thank you.