What would cause page up (PgUp) and page down (PgDn) to work at 1 site and not another? ^R and ^T work just fine at both sites. A-Shell version is identical, Zterm is identical, emulation and term is identical, both sites are ATS. I can login to both sites from the same PC, one works and one does not. Any ideas?

If the client is ZTERM, then it is definitely the case that the PgUp and PgDn keys are actually functions keys (i.e. they send a multi-byte ESC sequence rather than being translated locally to ^R and ^T). So it is up to the function key translation table on the server to correctly translate them. Assuming the emulation was AM62A, then we would be talking about LIB:AM62A.IFX for the command line or INFLD, and LIB:AM62A.VUX for VUE.

To check and/or fix the translation table, use:

.FIXTRN {VUX}

If you were using ATE as the emulator, or just local A-Shell/Windows, then by default PgUp and PgDn are translated in the local keyboard handler (to minimize this issue), but OPTIONS=NOAUTOXLT would disable that, in which case you are back to using the function key translations.

As an aside, "ATS" refers to the A-Shell Telnet Service, which applies only to Windows servers. It probably makes no difference for the issue here, but I suspect you are really dealing with a LINUX server, in which case you're just using the Linux Telnet (or SSH) service.

Right you are! Thank you very much.