| nr | name | cat | description | manufacturer | 
| 209 | ADM209 | driver | 0.1 µF, +5V Powered CMOS* RS-232 Driver/Receivers, data | AD | 
| 209 | MAX209 | xcvr | 5V-Powered, 5 Drivers/3 Receivers RS-232 Transceiver with 0.1 uF External Capacitors | Maxim* | 
| 20901 | PEB20901-N | isdn | ISDN Echo Cancellation Circuit (IEC-T) (SMD) | Siemens | 
| 20901 | PEB20901-P | isdn | ISDN Echo Cancellation Circuit (IEC-T) | Siemens | 
| 20901 | PEF20901-N | isdn | ISDN Echo Cancellation Circuit (IEC-T) (SMD) | Siemens | 
| 20902 | PEB20902-N | isdn | ISDN Echo Cancellation Circuit (IEC-T) (SMD) | Siemens | 
| 20902 | PEB20902-P | isdn | ISDN Echo Cancellation Circuit (IEC-T) | Siemens | 
| 20902 | PEF20902-N | isdn | ISDN Echo Cancellation Circuit (IEC-T) (SMD) | Siemens | 
| 2091 | PEB2091-N | isdn | ISDN Echo Cancellation Circuit (IEC-Q1 ) (SMD) | Siemens | 
| 2091 | PEF2091-N | isdn | ISDN Echo Cancellation Circuit (IEC-Ql) (SMD) | Siemens | 
| 20910 | AD20MSP910 |  | DMT-Based AD20msp910 Chipset, data | AD | 
| 2093 | ICD2093 | clock | 'Super Buffer' Clock Generator, Data | Cypress* | 
| 2095 | PEB2095-N | isdn | ISDN Burst Transceiver Circuit (IBC) (SMD) | Siemens | 
| 2095 | PEB2095-P | isdn | ISDN Burst Transceiver Circuit (IBC) | Siemens | 
| 20950 | PEB20950-N | isdn | ISDN Subscriber Access controller (ISAC-P) (SMD) | Siemens | 
| 20950 | PEB20950-P | isdn | ISDN Subscriber Access controller (ISAC-P) | Siemens | 
| 2096 | PEB2096-H | xcvr | Octal* Transceiver (OCTAT-P) (SMD) | Siemens |