Confused on webservice ports SAP<>external webservice

you have 3 ways to access the webservice from ABAP Application server

  1. Use a middleware like PI / PO where the actual call is made by the middleware and you call the middleware via an ABAP proxy
  2. If you have the webservice WSDL you can create a consumer proxy in ABAP via SE80 and configure SOAMANAGER. If its HTTPS you may need to upload the certificate in Tcode STRUST, if you get any SSL errors use SMICM tcode trace. In addition if you have a corporate firewall you will want to configure the proxy in SOAMANAGER port
  3. If the web service is REST enabled you can call using the ABAP http client classes

All of these are a bit complicated if you are new to ABAP so feel free to search on https://blogs.sap.com and you will get a lot of how to guides with step by step instructions

/r/SAP Thread