I'm not sure how many companies still use "pagers" aka "beepers", but this person is talking about the device you carry that would alert you when there is a problem with one of your systems. https://www.google.com/search?sca_esv=593535494&q=pager&tbm=...
Before mobile phones and beepers, institutions would use a public address system to announce “paging dr. whoever.” Makes me wonder whether the word comes from sending a “page” (an errand boy) to go look for dr. whoever and bring him back.
I guess now “carrying the pager” is a metaphor like “copy and paste” (from the glue used in newspaper layout).