T1-E1 Fiber Modem

T1/E1 Fiber Optic Modem

Model TC1630

  • Distances up to 40 km
  • Local/Remote Loopback
  • Supports AMI/B8ZS/HDB3 Line Codes
  • Eight LED Indicators
  • No Jitter
  • Multimode or Single Mode (850/1300/1550)
  • Low Power Consumption (3 Watts)
  • Full Digital Technology Design
  • 12/24/-48VDC, or 115/230VAC Power
  • High Temperature (-20°C to 70°C) Version Optional



The TC1630 Fiber Optic T1/E1 Modem is typically used to link Channel Banks, PBXs, and M13 multiplexers to DSX-1 Cross Connects in Video Conferencing and Distance Learning applications.  It is also used to link Customer Premises Equipment to CSU/DSUs and with metallic medium T1/E1 multiplexers to transmit over fiber optic cable.




The Model TC1630 is a T1/E1 Fiber Optic Modem that offers advanced features such as Jitter Removal, Multiple LEDs and a replaceable Line Interface Module. Because it is based on modern FPGA (Field Programmable Gate Array) technology, it offers optimum flexibility, extremely low current consumptions and high reliability. A rackmount version is available as TC1630R.

Transparent to the framing format, the TC1630 supports AMI, B8ZS and HDB3 line codes and DSX-1 (T1) cross connect distances from 0 to 655 feet. It includes an internal elastic buffer to remove jitter from transmit data.

Eight LED indicators help installation and troubleshooting—one each for POWER, T1/E1, BPV, AIS, ALARM, O-SYNC, RMT1-0, RMTLB. Eight DIP switches, accessible from the panel, provide control settings for line code, line length, local loopback or remote loopback. The intelligent line code setting switch eliminates confusion—such as when the line code does not match the line length setting.

The TC1630 is compatible with all popular types and sizes of optic cable. Fiber optic connectors are ST; FC is optional. Special four-position and two-position feed-thru detachable terminals connect the T1/E1 twisted pairs. Input power is 12VDC, 24VDC, -48VDC or 115/230VAC with an external power cube. An extreme temperature (-20oC to 70oC), TC1630Q is available.

NOTE: The TC1630 is 100% compatible with its predecessor Model TC1620.


Technical Specifications    

Data Rates
T1 1.544 Mbps
E1 2.048 Mbps
Transmitter ELED, ELED
Receiver PIN Diode
Wavelength 850nm, 1300nm Multimode
1300nm, 1550nm Single Mode
Fiber Optic Connectors ST or FC
Loss Budget*
(850nm, 1300nm, 1550nm)
Multimode (62.5/125µm): 20dB
Single Mode (9/125µm): 20dB
(Optional: 25dB and 30dB)
Interface T1 or E1 (G.703)
T1 Connector (100 Ohm) Terminal Blocks
E1 Connector (120 Ohm) Terminal Blocks
E1 Connector (75 Ohm) Terminal Blocks and BNC(Female) Cable
Bit Error Rate 1 in 1010 or better

* Contact factory for higher requirements
Visual Indicators
System Status Power, Alarm
T1/E1 Status O-Sync, BPV, A1S, T1/E1 OK, RMT1-0, RMTLB
Diagnostic Functions Local and Remote Loopback
Standard 12VDC @ 250mA
Optional 24VDC, -48VDC, or 115/230VAC (with external power cube)
Operating -10° to 50°C
Hi-Temp (optional) -20° to 70°C
Storage -40° to 90°C
Humidity 95% non-condensing
Height (2.79 cm) 1.1"
Width (12.70 cm) 5.0"
Depth (6.35 cm) 2.5"
Weight (147.0 gm) 5.2 oz.


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