Avaya P580 - Manual (Page 667)

Document No. 10-300090, Issue 1 30-51
System
set 48_port_mode
Command Mode Global Configuration.
Description Enables 48-port mode on the switch.
If you install an 80-series, 48-port, 10/100 module with Telco connectors
(M8048R-100TC) in a switch, you must enable 48-port mode for the
module to operate.
Syntax
Systems P550R, P580, P880, and P882.
To Enable: set 48_port_mode enable
To Disable: set 48_port_mode disable