... Server(s) 125 1 to 25 00 : Primary1 to 125 0: Backup 25 01 to37 50 M3751 to 500 0M1 to 125 0 M 125 1 to 25 00 M 25 01 to37 50 M3751 to 500 0M 500 1 to 625 0 M 625 1 to7 500 M7 501 to87 50 M8751 to 10, 000 M87 423 Primary/BackupBackup/PrimaryDistribute ... 7 500 : Primary1 to 37 50: Backup7 501 to11 ,25 0 M11 ,25 1 to15 ,00 0M1 to 37 50 M3751 to7 500 M7 501 to11 ,25 0 M11 ,25 1 to15 ,00 0M15 ,00 1 to18,7 50 M18,751 to 22 , 500 M 22 , 501 to 26 ,25 0 M 26 ,25 1 ... device. Cisco MCS-7 822 Pentium III (550MHz), 512MB RAM 500 100 0 No No Cisco MCS-7 8 20 Pentium III ( 500 MHz), 512MB RAM 500 100 0 No No Cisco SPE 3 10 (ICS 77 50) Pentium III ( 700 MHz), 512MB RAM 100 0 20 00 ...