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SmartLink 4020 Getting Started Guide B • Specifications
Voice Services/Features
Call forwarding
Call transfer
Call hold
Call waiting
3-way calling
IP Services
IPv4 router; RIPv1, v2 (RFC 1058 and 2453)
IP filtering
NAPT
NTP
DHCP client & server
PPPoE
IPSEC VPN
Programmable static routes
ICMP redirect (RFC 792); Packet fragmentation
DiffServe/ToS set or queue per header bits
VLAN support 802.1p/q
AES/DES/3DES Encryption
Management
Browser configuration interface
TFTP configuration & firmware loading
SNMP v2 agent (MIB II and private MIB)
Operating Environment
Operating temperature: 0–40°C (32–104°F)
Operating humidity: 5–80% (non condensing)
System
Power: 100–240 VAC (50/60 Hz)