| nr | name | description | manufacturer | 
|  | HFC-S PCI | ISDN controller (including S/T interface, HDLC controllers for B-channels and D-channel, PCI bus interface, PCM30 interface) (HFC-S PCI is usable as "PCI to 8 bit generic" bridge, too) (3.3V and 5V) | Cologne* | 
|  | HFC-S+ | ISDN controller (including S/T interface, HDLC controllers for B-channels and D-channel, microprocessor interface, PCM30 interface) (3.3V and 5V) | Cologne* | 
|  | HFC-SP | ISDN controller (including S/T interface, HDLC controllers for B-channels and D-channel, microprocessor interface, ISA-PnP bus interface, PCMCIA bus interface, PCM30 interface) (3.3V and 5V) | Cologne* | 
| 2 | HFC-S2M | ISDN controller (including primary rate interface (E1 / T1), HDLC controllers for all B-channels and D-channel, ISA-PnP bus interface, PCMCIA bus interface, PCI bus interface, PCM30/64/128 interface, switching capability, DTMF detection) (3.3V and 5V) | Cologne* | 
| 20 | HFC2BS0 | ISDN HDLC FIFO* Controller, More | Cologne* | 
| 2025 | PEB2025-N | ISDN Exchange Power controller (IEPC) (SMD) | Siemens | 
| 2025 | PEB2025-P | ISDN Exchange Power controller (IEPC) | Siemens | 
| 2070 | PEB2070-N | ISDN Communications controller (ICC) (SMD) | Siemens | 
| 2070 | PEB2070-P | ISDN Communications controller (ICC) | Siemens | 
| 2070 | PEF2070-N | ISDN Communication controller (ICC) (SMD) | Siemens | 
| 2075 | PEB2075-N | ISDN D-Channel Exchange controller (IDEC) (SMD) | Siemens | 
| 2075 | PEB2075-P | ISDN D-Channel Exchange controller (IDEC) | Siemens | 
| 2075 | PEF2075-N | ISDN D-Channel Exchange controller (IDEC) (SMD) | Siemens | 
| 2085 | PEB2085-N | ISDN Subscriber Access controller (ISAC-S) (SMD) | Siemens | 
| 2085 | PEB2085-P | ISDN Subscriber Access controller (ISAC-S) | Siemens | 
| 2086 | PEB2086-H | ISDN Subscriber Access controller (ISAC-S) (SMD) | Siemens | 
| 2086 | PEB2086-N | ISDN Subscriber Access controller (ISAC-S) (SMD) | Siemens | 
| 20901 | PEB20901-N | ISDN Echo Cancellation Circuit (IEC-T) (SMD) | Siemens | 
| 20901 | PEB20901-P | ISDN Echo Cancellation Circuit (IEC-T) | Siemens | 
| 20901 | PEF20901-N | ISDN Echo Cancellation Circuit (IEC-T) (SMD) | Siemens | 
| 20902 | PEB20902-N | ISDN Echo Cancellation Circuit (IEC-T) (SMD) | Siemens | 
| 20902 | PEB20902-P | ISDN Echo Cancellation Circuit (IEC-T) | Siemens | 
| 20902 | PEF20902-N | ISDN Echo Cancellation Circuit (IEC-T) (SMD) | Siemens | 
| 2091 | PEB2091-N | ISDN Echo Cancellation Circuit (IEC-Q1 ) (SMD) | Siemens | 
| 2091 | PEF2091-N | ISDN Echo Cancellation Circuit (IEC-Ql) (SMD) | Siemens | 
| 2095 | PEB2095-N | ISDN Burst Transceiver Circuit (IBC) (SMD) | Siemens | 
| 2095 | PEB2095-P | ISDN Burst Transceiver Circuit (IBC) | Siemens | 
| 20950 | PEB20950-N | ISDN Subscriber Access controller (ISAC-P) (SMD) | Siemens | 
| 20950 | PEB20950-P | ISDN Subscriber Access controller (ISAC-P) | Siemens | 
| 2110 | PSB2110-H | ISDN Terminal Adaptor Circuit (ITAC) (SMD) | Siemens | 
| 2110 | PSB2110-N | ISDN Terminal Adapter Circuit (ITAC) (SMD) | Siemens | 
| 2110 | PSB2110-P | ISDN Terminal Adapter Circuit (ITAC) | Siemens | 
| 2120 | PSB2120-P | ISDN Remote Power controller (IRPC) | Siemens | 
| 2120 | PSB2120-T | ISDN Remote Power controller (IRPC) (SMD) | Siemens | 
| 2141 |  | T1/ISDN Primary Rate Controller, | Dallas* | 
| 2180 |  | T1/ISDN Primary Rate Transceiver, | Dallas* | 
| 2186 | PEB2186-H | ISDN Subscriber Access controller for Terminals (ISAC-STE) | Siemens | 
| 2186 | PEB2186-N | ISDN Subscriber Access controller for Terminals (ISAC-STE) | Siemens | 
| 2186 | PEB2186-P | ISDN Subscriber Access controller for Terminals (ISAC-STE) | Siemens | 
| 2186 | PSB2186-H | ISDN Subscriber Access controller for Terminals (ISAC-STE) (SDM) | Siemens | 
| 2186 | PSB2186-N | ISDN Subscriber Access controller for Terminals (ISAC-STE) (SMD) | Siemens | 
| 2186 | PSB2186-P | ISDN Subscriber Access controller for Terminals (ISAC-STE) | Siemens | 
| 2196 | PSB2196-H | ISDN Subscriber Access controller for Upn-lnterface Terminals (ISAC-PTE) (SMD) | Siemens | 
| 2196 | PSB2196-N | ISDN Subscriber Access controller for Upn-lnterface Terminals (ISAC-PTE) (SMD) | Siemens | 
| 2236 | PEB2236-N | ISDN Primary Access Transceiver (IPAT-2) (SMD) | Siemens | 
| 2236 | PEB2236-P | ISDN Primary Access Transceiver (IPAT-2) | Siemens | 
| 2236 | PEF2236-N | ISDN Primary Access Transceiver (IPAT-2) (SMD) | Siemens | 
| 2236 | PEF2236-P | ISDN Primary Access Transceiver (IPAT-2) | Siemens | 
| 310 | LXT310 | T1 CSU/ISDN PRI Transceiver | Level1 | 
| 318 | LXT318 | E1 NTU/ISDN PRI Transceiver | Level1 | 
| 360 | LXT360 | Integrated T1/E1 Long-Haul/Short-Haul Transceivers for DS1/DSX-1/CSU or NTU/ISDN PRI Applications | Level1 | 
| 361 | LXT361 | Integrated T1/E1 Long-Haul/Short-Haul Transceivers for DS1/DSX-1/CSU or NTU/ISDN PRI Applications | Level1 | 
| 4 | HFC-4S | ISDN controller (including 4 x S/T interface, HDLC controllers for all B-channels and D-channels, ISA-PnP bus interface, PCMCIA bus interface, PCI bus interface, PCM30/64/128 interface, switching capability, DTMF detection) (3.3V and 5V) | Cologne* | 
| 5622 | XRT56L22 | Low Power Repeater/Receiver | Exar | 
| 5683 | XRT5683A | PCM* Line Interface Chip | Exar | 
| 5684 | XRT5684 | Low Power T1 Analog Interface | Exar | 
| 5685 | XRT56L85 | Low Power PCM* Line Interface | Exar | 
| 5793 | XRT5793 | Quad* E1 Line Interface Unit | Exar | 
| 5794 | XRT5794 | Quad* E1 Line Interface Unit | Exar | 
| 5894 | XRT5894 | Four-Channel E1 Line Interface (3.3V or 5.0V) | Exar | 
| 5897 | XRT5897 | Seven-Channel E1 Line Interface | Exar | 
| 5991 | XRT59L91 | Single Chip E1 Line Interface Unit | Exar | 
| 5997 | XRT5997 | Seven Channel E1 Line Interface Unit | Exar | 
| 68606 | MC68606 | X.25 Multi-link LAPD protocol controller CCITT Q.920/921 in ISDN | Motorola* | 
| 7100 | XRT71D00 | Single-Chip Jitter Attenuator for High-Speed DS3/E3 WANs | Exar | 
| 7213 | XRT72L13 | Multiplexer/Framer IC* | Exar | 
| 7250 | XRT7250 | DS3/E3 Framer IC* | Exar | 
| 7288 | XRT7288 | CEPT1 Line Interface | Exar | 
| 7295 | XRT7295 | DS3/Sonet STS-1 Integrated Line Receiver | Exar | 
| 7295 | XRT7295E | E3 (34.368 Mbps) Integrated Line Receiver | Exar | 
| 7296 | XRT7296 | DS3/STS-1/E3 Integrated Line Transmitter | Exar | 
| 7298 | XRT7298 | DS2/STS-1 E3 Integrated Line Transmitter | Exar | 
| 7300 | XRT7300 | DS3/E3/STS-1 Line Interface Unit | Exar | 
| 7302 | XRT7302 | 2 Channel E3 | Exar | 
| 7303 | XRT73L03 | 3 Channel E3/DS3/STS-1 Line Interface Unit | Exar | 
| 8 | HFC-8S | ISDN controller (including 8 x S/T interface, HDLC controllers for all B-channels and D-channels, ISA-PnP bus interface, PCMCIA bus interface, PCI bus interface, PCM30/64/128 interface, switching capability, DTMF detection) (3.3V and 5V) | Cologne* | 
| 8000 | XRT8000 | Clock Synchronizer/Adapter for Communications | Exar | 
| 80000 | VNS80000 | VIP ISDN processor, Family | ARM | 
| 8001 | XRT8001 | WAN Clock | Exar | 
| 8071 | R8071 | ISDN/DMI Link Layer controller | Rockwell* | 
| 8224 | XRT82L24 | Quad* E1 Line Tranceiver with Clock Recovery and Jitter Attenuator | Exar | 
| 8424 | XRT84V24 | Quad* E1 Framer IC* | Exar | 
| 8926 | MT8926 | T1 Performance Monitoring Adjunct Circuit (PMAC) | Mitel | 
| 8976 | MT8976 | T1/ESF Framer Circuit | Mitel | 
| 89760 | MH89760B | T1/ESF Framer & Interface | Mitel | 
| 89761 | MH89761 | T1 Transmit Equalizer | Mitel | 
| 8977 | MT8977 | T1/ESF Framer Circuit (ACCUNET 1.5) | Mitel | 
| 89770 | MH89770 | T1/ESF Framer & Interface | Mitel | 
| 8979 | MT8979 | CEPT PCM* 30/CRC-4 Framer & Interface | Mitel | 
| 89790 | MH89790B | CEPT PCM* 30/CRC-4 Framer & Interface | Mitel | 
| 89791 | MH89791 | CEPT PCM* 30 Transmit Equalizer | Mitel | 
| 89792 | MH89792 | E1 Transceiver | Mitel | 
| 89793 | MH89793 | E1 Transceiver with Selectable Impedance | Mitel | 
| 9079 | MT9079 | Advanced controller for E1 Prototyping Kits | Mitel |