How do I solve Error 503? | Community
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K
Newcomer
Khartalia
Newcomer
March 31, 2023
Question

How do I solve Error 503?

  • March 31, 2023
  • 1 reply
  • 4 views

Hi all...I use ZOOM phone service through my work account, but I work from home. Each morning I start up ZOOM, I need to completely log out of ZOOM and restart the app before I can make calls. Several days ago, the resetting process no longer worked. ZOOM will not connect for phone calls (Service Unavailable: Code 503). The phone pad stays greyed out, so I can't make any calls. When I try to look at the details of the error, it says Registration Error. I have tried rebooting the app multiple times, and rebooting my computer and modem/router several times. Nothing is working. ZOOM continues to attempt connection all day, but no success. It was suggested that I turn off my SIP ALG setting in my modem, but nobody seems to know how to navigate around within my router settings to find this one setting, including my service provider who gave us the modem!

 

All recommendations welcome...

      1 reply

      E
      Community Super Champion | Partner
      Eliot
      Community Super Champion | Partner
      April 3, 2023

      with a little information, we may be able to figure this out.

      1.  what is make and model number of your modem and router at your home? 

      2. which internet service provider are you using at your home?

      3.  what zoom client and client version number are you using?

      4.  what is the make and model number and operating system of your laptop?

       

      thanks,  eliot

        K
        Newcomer
        KhartaliaAuthor
        Newcomer
        April 3, 2023

        1. Gateway CGM4140COM (modem and router are one unit)

        2. Rogers

        3. I don't know about the client, but the version is 5.14.2. I use it through my workplace ZOOM account (Trillium College). 

        4. Windows 11

          E
          Community Super Champion | Partner
          Eliot
          Community Super Champion | Partner
          April 4, 2023

          hi khartalia,

           

          i checked the rogers community and found a post about the necessity of disable sip/alg.  i suggest that you contact rogers to have sip/alg turned off.

          SIP / ALG setting for VOIP Phones - Rogers Community

           

          thanks,  eliot

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