| 0B1 | Add Manual Set |
| 0B2 | Operating Manual |
| 0B3 | Service Manual |
| 0BF | Programming Reference Manuals |
| 0YH | 155/622 Mb/s NRZ (Binary I/F) module |
| 0YK | Broadband auxiliary module |
| 110 | DS3/1/E3/1 Structured Test IF |
| 120 | 155/52 Mb/s SONET/SDH |
| 130 | Dual Wavelength 1310 & 1550 nm |
| 131 | Single Wavelength (1310 nm) |
| 140 | Jitter Generation |
| 141 | Extended Jitter Generation Mdl (Siemens) |
| 15910B | |
| 1A8 | HP-IB I/F for remote control/printing |
| 1CW | RS-232 Interface |
| 1F7 | LAN Interface |
| 200 | Synthesized BER testing 700k-170Mbs-BNC |
| 600 | Omnibook Remote Controller |
| A1M | SDH (STM1E) & PDH jitter meas (BNC) |
| A1N | SDH (STM1E/10) & PDH jitter meas (BNC) |
| A1P | SDH (STM1E/10/40)& PDH jitter meas (BNC) |
| A1Q | SDH (STM1E) & PDH jitter meas (Siemens) |
| A1R | SDH (STM1E/10)& PDH jitter meas(Siemens) |
| A1S | SDH(STM1E/10/40)&PDH jitter meas (Siemens) |
| A1T | STM-1e,DCC SDH Module for ATM |
| A1U | SDH pointer seq &overhead module-Siemens |
| A3B | LAN,RS-232-C & GP-IB |
| A3D | RS-232-C & GP-IB Remote Control |
| A3K | Jitter & Wander Generation |
| A3L | STM-1e Peak-to-Peak |
| A3M | Pk-Pk & RMS STM-1e jitter Rx (Siemens) |
| A3N | STM-4o,STM-1o,STM-1e |
| A3P | Pk-Pk&RMS STM-4o/1o/1e jitter Rx(Siemns) |
| A3Q | Jitter & wander generator (Siemens) |
| A3R | STM-1e,0e, DCC Drop/Insert |
| A3S | STM-0/STM-1 Pointer seq & OH mdl-Siemens |
| A3V | STM-1o,STM-1e Peak-to-Peak |
| A3W | Pk-Pk & RMS STM-1o/1e jitter Rx (Siemns) |
| AVA | Calibration manual |
| UH1 | STM-1o (1310 nm) |
| UH2 | STM1/STM4 optical interface |
| UH3 | PDh Binary IF,Ext. Clock Input |
| UH4 | Optical adapters - FC/PC connectors |
| UH5 | Optical adapters - DIN 47526 connectors |
| UH6 | Optical adapters - ST connectors |
| UH7 | Optical adapters - biconic connectors |
| UH8 | Optical adapters - NEC D4 connectors |
| UHC | 3 additional outputs - PDH |
| UHE | Virtual remote firmware |
| UHK | Jitter generation module |
| UHN | Peak-to-Peak Jitter Measurement |
| UKJ | 140/34/8/2 Mb/s |
| UKK | 140/34/8/2 Mb/s,704Kb/s |
| UKL | Structured PDH receive only |
| UKM | ATM cell layer module |
| UKN | ATM Cell at 140/34/8/2 Mb/s |
| UKP | Optical adapters - SC connectors |
| UKQ | Optical adapters - HMS-10 connectors |
| UKT | Single Wavelength (1310 nm) |
| UKX | Integrated Graphics Printer |
| UKZ | ATM Cells at DS3,DS1,E1 & E3 |
| URU | STM1/STM4 1550nm optical interface |
| US1 | SDH stress test module (BNC) |
| US5 | SDH test module (Siemens) |
| US6 | 3 more outputs - PDH (Siemens) |
| US7 | PDH Binary Interfaces (Siemens) |
| US9 | PDH jitter meas + 2M wander (Siemens) |
| USA | Structured PDH with small Siemens conn. |
| USB | Unstructured PDH (Siemens) |
| USC | Structured PDH Rx only (Siemens) |
| USE | ATM cell layer + PDH module (Siem. con.) |
| USK | ATM Services module |
| USL | Ethernet & Token Ring LAN |
| USN | Dual Wavelength (1310nm&1550nm) |
| USS | HP Network Analyzer Firmware |