3com DUA1770-0AAA04 User Manual
74
A
PPENDIX
C: T
ECHNICAL
S
PECIFICATIONS
Heat Dissipation
Switch 4900:
1050 BTU/hour maximum
Switch 4900 SX:
560 BTU/hour maximum
Switch 4924:
870 BTU/hour maximum
Switch 4950: 685
BTU/hour maximum
Power Supply
AC Line Frequency
50/60 Hz
Input Voltage Options
90–240 VAC
Current Rating
Switch 4900:
4 A (amps) (maximum)
Switch 4900 SX:
3 A (amps) (maximum)
Switch 4924 and 4950:
4.5 A (amps) (maximum)
Standards Supported
SNMP:
SNMP protocol (RFC 1157)
MIB-II (RFC 1213)
Bridge MIB (RFC 1493)
RMON MIB II (RFC 2021)
Remote Monitoring MIB (RFC 1757)
MAU MIB (RFC 2239)
Terminal Emulation:
Telnet (RFC 854)
Protocols Used for Administration:
UDP (RFC 768)
IP (RFC 791)
ICMP (RFC 792)
TCP (RFC 793)
ARP (RFC 826)
TFTP (RFC 783)
DHCP (RFC 2131, RFC 2132, RFC 1534)
BOOTP (RFC 951, RFC 1497)
IGMP (RFC 1112 & 2236)
RADIUS (RFC 2865, 1321, & 2869)
RMON: (RFC 2819)