| Manufacturer | ADC |
| Manufacturer Part # | HLU-231 L8 |
| Cost Central Item # | 10704804 |
| Product Description | ADC HiGain HDSL Central Office Line Unit HLU-231 List 8 - DSL modem - plug-in module - 1.544 Mbps - T-1 |
| Device Type | DSL modem |
| Enclosure Type | Plug-in module |
| Approximate Dimensions (WxDxH) | 1.4 in x 10 in x 5.9 in |
| Approximate Weight | 0.4 lbs |
| Max Transfer Rate | 1.544 Mbps |
| Digital Signaling Protocol | HDSL |
| Line Rate | T-1 |
| Line Coding Format | AMI, B8ZS, 2B1Q |
| Connectivity Technology | Wired |
| Max Transfer Rate | 1.544 Mbps |
| Digital Signaling Protocol | HDSL |
| Line Rate | T-1 |
| Line Coding Format | AMI, B8ZS, 2B1Q |
| Framing Format | ESF, SF |
| Interfaces | 1 x management - RS-232 - 9 pin D-Sub (DB-9) |
| Compatible Slots | 1 x expansion slot |
| Min Operating Temperature | -40 °F |
| Max Operating Temperature | 149 °F |
| Humidity Range Operating | 5 - 95% |