| | Cisco 1003 Router Specifications |
| Fixed LAN Ports (connections) | 1-port Ethernet (10BaseT) |
| Fixed WAN Ports (connections) | 1-port ISDN BRI (S/T) |
| Modular Slots | None |
| Processor Speed (type) | 25-Mhz (MC68360) |
| Flash Memory | 2 MB (default)
4 MB card optional |
| DRAM Memory | 8 MB (default) |
| Dimensions (HxWxD) | 1.75 x 8 x 8.3 in. |
| Service Category | 2 |
| | Cisco 1004 Router Specifications |
| Fixed LAN Ports (connections) | 1-port Ethernet (10BaseT) |
| Fixed WAN Ports (connections) | 1-port ISDN BRI(U) |
| Modular Slots | None |
| Processor Speed (type) | 25-Mhz (MC68360) |
| Flash Memory | 2 MB (default)
4 MB card optional |
| DRAM Memory | 8 MB (default) |
| Dimensions (HxWxD) | 1.75 x 8 x 8.3 in. |
| Service Category | 2 |
| | Cisco 1005 Router Specifications |
| Fixed LAN Ports (connections) | 4-port Ethernet (10BaseT) |
| Fixed WAN Ports (connections) | 1-port sync serial (DB-60) |
| Modular Slots | None |
| Flash Memory | 2 MB (default)
4 MB card optional |
| DRAM Memory | 8 MB (default) |
| Dimensions (HxWxD) | 1.75 x 8 x 8.3 in. |
| Service Category | 2 |
