... 3 Network Module slots; BDCOM 2640/2641 Series Router ------------SMB Aggregation Router Proudly presented by Shanghai Baud Data Communication Co. ... 2641-DC is also available. Application· Core router for SMBs, aggregation router for large networks, and multi-service access platform ... XoT, X.25-TCP, 802.1Q, MPLSNetwork LayerARP, Proxy ARP, DNS, DNS Proxy, NAT, ICMP, IGMP, DHCP (Server/Client/Relay), ...