ETU/TTU Interface Modules
When purchasing one of our single or multi-port access units or multiplexers that support user replaceable interface modules, our ETU/TTU interface modules provide easily selectable electrical interfaces for a wide selection of user applications. In addition to standard datacom interfaces such as V.35, RS-530, X.21, RS-449, etc. Ethernet modules are also available for bridging or routing of Ethernet over E1 or T1 network services. The family of interfaces are summarised below:
ETU/TTU-V35 Interface
Features:
- Compliant with ITU-T V.35 standards
- Winchester type 34-pin MB34 M-Block female connector
- Synchronous data rate at Nx64 (where N=1 to 32)
- Data Communications Equipment interface Electrically compatible to ITU-T V.11 (RS-422)
ETU/TTU-X21 Interface
Features:
- Compliant with ITU-T X.21 standard (Balanced)
- 15-pin D Sub female connector
- Synchronous data rate at Nx64 (where N=1 to 32)
- Data Communications Equipment interface Electrically compatible to V.11
ETU/TTU-232 Interface
Features:
- Compliant with EIA RS-232-C (Unbalanced)
- Compatible to ITU-T V.24 25-pin D Sub female connector
- Synchronous data rate at 64 or 128Kb/s Asynchronous (transparent) at up to 19.2K or 38.4K Data Communications Equipment interface
ETU/TTU-NRZ Interface
Features:
- 4 BNC connectors: TxD,TxC,RxD and RxC (Data&Clock)
- NRZ line coding Logic "1" 0V +/- 0.3V Logic "0" -1.5V +/- 0.3V
- Synchronous data rate Nx64 (where N=1 to 32)
ETU/TTU-530 Interface
Features:
- Compliant with Category 1 EIA-530 (Balanced) 25-pin D Sub female connector
- Synchronous data rate at Nx64 (where N=1 to 32)
- Data Communications Equipment interface Electrically compatible to RS-422
ETU/TTU-449 Interface
Features:
- Compliant with EIA/TIA-530-A (Balanced) 37-pin D Sub female connector
- Synchronous data rate at Nx64 (where N=1 to 32)
- Data Communications Equipment interface Electrically compatible to RS-422
ETU/TTU-G64 Interface
Features:
- Pulse shape compliant with ITU-T G.703
- Clock frequency: 64KHz
- Pulse Amplitude: 1.0V
- Zero Amplitude: 0V
- Impedance: 120 Ohms
- 15-Pin D Sub connector
- Range: up to 800m with 24AWG
ETU/TTU-ET100R 10/100 Base-TX Ethernet Router
Features: 
- Ethernet port IP Address/subnet mask
- Dynamic Routing RIP I & II, Send or Receive on Ethernet or WAN
- PPP, HDLC and Cisco HDLC WAN protocol encapsulation
- WAN port IP Address/subnet mask
- DHCP server/client; NAT Function; Virtual Server Mapping
ETU/TTU-ET100 10/100 Base-TX Ethernet Bridge
Features:
- High performance bridge for 10Base-T or 100Base-TX Ethernet extension
- Transparent half / Full duplex support on WAN / LAN interface.
- Provides Ethernet over E1 economically
- No IP address settings required
- Simple DIP switch setting to control filtering, packet buffer and Ethernet auto/forced mode
