# One or two independent Ethernet ports or an integrated four-port switch (10/100BaseT)
# Data interfaces: V.35, RS-530, V.36/RS-449, V.24, X.21
# Three optional sub-E1/T1 ports or four analog ports (FXS, FXO, E&M) for PBX/phone connectivity
# IP/IPX routing and transparent bridging; OSPF support
# Supports Frame Relay (RFC 1490) and PPP protocols
# Self-healing ring and drop-andinsert capabilities
# Fail-safe sub-E1/T1 ensures uninterrupted service
# Dial backup over ISDN/PSTN