Not a bug
BYOND Version:447
Operating System:Windows XP Home
Web Browser:Firefox 3.5.1
Status: Not a bug

This is not a bug. It may be an incorrect use of syntax or a limitation in the software. For further discussion on the matter, please consult the BYOND forums.
Descriptive Problem Summary:
In the BYOND Pager, me and some of my pager friends aren't recieving pages until the very second they send a page

I tested this myself, and over 50% of the time, this occured.

Numbered Steps to Reproduce Problem:
1.) Get two people
2.) Have one page another
3.) Wait for a message to not send, but have it recieve when you send another page

Expected Results:
To be able to use the pager for convenience

Actual Results:
Some conversations get "dropped", and i'm not recieving any messages until i send a page

Does the problem occur:
Every time? Or how often? Over half of the time
In other games? Not applicable.
In other user accounts? Yes
On other computers? Yes

When does the problem NOT occur?
I don't know.

Don't use the BYOND Pager
A conversation being dropped entirely would be bad, but your numbered steps say that's not happening. What you're seeing is a delay in delivery, which is normal behavior.

Since the pager does not keep a persistent connection to the hub, messages that are sent are not delivered instantly. Instead, they are delivered when that user next connects or when the hub, about once a minute, contacts the other user with an update. The hub can only make this kind of connection if the other user is not behind a firewall or router blocking it, or they have configured the firewall/router to allow incoming messages from the hub. If that is not the case, their pager will still try to contact the hub at regular intervals (a few minutes) at which time the hub will send its updates that way. If you are seeing transmission delays longer than a minute, it is a sign that one or both parties do not have their pagers, firewalls, and/or routers configured correctly.