| nr | name | cat | description | manufacturer | 
| 2180 |  | isdn | T1/ISDN Primary Rate Transceiver, | Dallas* | 
| 2180 | DS2180A | telecom | T1 Transceiver, Data, PS (672 Kb) | Dallas* | 
| 2181 |  | telecom | CEPT Primary Rate Transceiver, | Dallas* | 
| 2181 | ADSP-2181 | dsp | 16-bit, 40 MIPS, 5v, 2 serial ports, host port, 80 KB RAM, data | AD | 
| 2181 | DS2181A | telecom | CEPT Primary Rate Transceiver, PS (601 Kb) | Dallas* | 
| 2182 | DS2182 | telecom | T1 Line Monitor, PS (450 Kb) | Dallas* | 
| 2183 | ADSP-2183 | dsp | 16-bit, 52 MIPS, 3.3 v, 2 serial ports, host port, 80 KB RAM, data | AD | 
| 2185 | ADSP-2185 | dsp | 16-bit, 40 MIPS, 5 v, 2 serial ports, host port, 80 KB RAM, data | AD | 
| 2185 | ADSP-2185L | dsp | 16-bit, 52 MIPS, 3.3v, 2 serial ports, host port, 80 KB RAM, data | AD | 
| 2186 |  | telecom | T1/CEPT Transmit Line Interface, | Dallas* | 
| 2186 | ADSP-2186 | dsp | 16-bit, 40 MIPS, 5v, 2 serial ports, host port, 40 KB RAM, data | AD | 
| 2186 | ADSP-2186L | dsp | 16-bit, 40 MIPS, 3.3 v, 2 serial ports, host port, 40 KB RAM, data | AD | 
| 2186 | DS2186 | telecom | Transmit Line Interface, Data, PS (242 Kb) | Dallas* | 
| 2186 | PEB2186-H | isdn | ISDN Subscriber Access controller for Terminals (ISAC-STE) | Siemens | 
| 2186 | PEB2186-N | isdn | ISDN Subscriber Access controller for Terminals (ISAC-STE) | Siemens | 
| 2186 | PEB2186-P | isdn | ISDN Subscriber Access controller for Terminals (ISAC-STE) | Siemens | 
| 2186 | PSB2186-H | isdn | ISDN Subscriber Access controller for Terminals (ISAC-STE) (SDM) | Siemens | 
| 2186 | PSB2186-N | isdn | ISDN Subscriber Access controller for Terminals (ISAC-STE) (SMD) | Siemens | 
| 2186 | PSB2186-P | isdn | ISDN Subscriber Access controller for Terminals (ISAC-STE) | Siemens | 
| 2187 | ADSP-2187L | dsp | 16-bit, 52 MIPS, 3.3v, 2 serial ports, host port, 160 KB RAM, data | AD | 
| 2187 | DS2187 | telecom | T1/CEPT Receive Line Interface, Data, PS (238 Kb) | Dallas* | 
| 21870 | ADSP-21MOD870 | modem | 16-bit, first complete digital modem on a single chip, data | AD | 
| 2188 | DS2188 | telecom | T1/CEPT Jitter Attenuator, Data, PS (251 Kb) | Dallas* |