| Parameters | NetEngine AR651C | NetEngine AR651 | NetEngine AR651W | NetEngine AR651W-8P | NetEngine AR657W |
| Forwarding Performance (LAN -> WAN + WAN -> LAN, NAT + ACL + QoS, IMIX, Default) | 1 Gbit/s | 1 Gbit/s | 1 Gbit/s | 1 Gbit/s | 1 Gbit/s |
| Forwarding Performance (LAN -> WAN + WAN -> LAN, NAT + ACL + QoS, IMIX, Boost License) | 1.5 Gbit/s | 2 Gbit/s | 2 Gbit/s | 2 Gbit/s | 2 Gbit/s |
| IPsec Performance (IMIX) | 800 Mbit/s | 1 Gbit/s | 1 Gbit/s | 1 Gbit/s | 1 Gbit/s |
| Fixed WAN Ports | 2 x GE SFP and 2 x GE RJ45 | 2 x GE combo | 2 x GE combo | 2 x GE combo | 2 x GE combo and 1 x VDSL 35b |
| Fixed LAN Ports | 8 x GE RJ45 (can be configured as WAN) | 8 x GE RJ45 (can be configured as WAN) | 8 x GE RJ45 (can be configured as WAN) | 8 x GE RJ45 (can be configured as WAN) | 8 x GE RJ45 (can be configured as WAN) |
| WLAN | - | - | Dual-band (2.4 GHz and 5 GHz), 802.11b/g/n/ac | Dual-band (2.4 GHz and 5 GHz), 802.11b/g/n/ac | Dual-band (2.4 GHz and 5 GHz), 802.11b/g/n/ac |
| Service Extension Slot | - | 1 x MIC | 1 x MIC | 1 x MIC | 1 x MIC |
| USB Port | 1 x USB 3.0 (compatible with USB 2.0) | 1 x USB 3.0 (compatible with USB 2.0) | 1 x USB 3.0 (compatible with USB 2.0) | 1 x USB 3.0 (compatible with USB 2.0) | 1 x USB 3.0 (compatible with USB 2.0) |
| Auxiliary or Console Port | 1 x RJ45 console port | 1 x RJ45 console port | 1 x RJ45 console port | 1 x RJ45 console port | 1 x RJ45 console port |
| Memory | 1 GB | 2 GB | 2 GB | 2 GB | 2 GB |
| Flash Memory | 1 GB | 1 GB | 1 GB | 1 GB | 1 GB |
