What is acceptable Jitter & RSSI for 5.7Ghz SM?

I’ve been having problems with a customer who’s PC keeps telling him he connected, then not connected.

What is an acceptable Jitter and RSSI for this SM and s/w version?

He has a 5.7Ghz SM and is running s/w version CANOPY4.2.3 Jul 23 2004 11:13:49 SM-DES.

Here are the numbers taken
RSSI 1448 (NA)
Jitter 4

Gregg Smith
Westcom Broadband