T3 - E3 Fiber Optic Modem, compatible with B3ZS (T3) and HDB3 (E3)

The TC1680 is compatible with B3ZS (T3) and HDB3 (E3) coded data streams and conforms to applicable standards including ANSI T1.102-1993, TR-TSY-000499 and CCITT G.703. The TC1680 T3/E3 Fiber Optic Modem provides a high speed point-to-point data link between two DS3 or G.703 conforming devices. TC1680 transmits standard T3 (44.736M) or E3 (34.368M) signals at distances up to 100km. It

Applications

The TC1680 is ideal for most T3/E3 connectivity applications up to distances of 100km. Typical applications include replacing coaxial cable with fiber, extending the point of presence from Telco demarcation points and ATM nodes, transmitting digitized video or linking T3/E3 multiplexers.

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Description

The TC1680 T3/E3 Fiber Optic Modem provides a high speed point-to-point data link between two DS3 or G.703 conforming devices. User benefits include easy installation and troubleshooting, high reliability, low power consumption (less than 5 Watts), virtually no jitter (because the signal is re-timed at the remote end), and overall small size (1.4" X 7.1" X 9.8").

The TC1680 transmits standard T3 (44.736M) or E3 (34.368M) signals at distances up to 100km. It is compatible with B3ZS (T3) and HDB3 (E3) coded data streams and conforms to applicable standards including ANSI T1.102-1993, TR-TSY-000499 and CCITT G.703.

Diagnostics include built-in self test, link verification test (local and remote loopback), and a dry contact for remote alarm. Sixteen LEDs are provided to help installation and troubleshooting. These LEDs indicate power, alarm status, T3/E3 signal loss and optical status. Four DIP switches, accessible from the front panel, control settings for the built-in signal generator, local & remote loopback, and general alarm.

Power redundancy is standard, optical redundancy is optional. Both power and optical redundancy systems include an automatic switchover feature to insure virtually uninterrupted operation. The TC1680 is available multimode (1300nm) or single mode (1300/1550nm) and in rackmount (TC1680R) or stand alone (TC1680S) versions. The TC1680R PC card version fits into TCRM191 and TCRM195 card cages.

The TC1680 is compatible with all popular types and sizes of fiber optic cable. Fiber optic connectors are ST or FC. The electrical connector is BNC. Input power is 12VDC, optional 24VDC, -48VDC or 115/230VAC with an external power cube. An extreme temperature version (-20ºC to 70ºC), Model TC1680T, is also available.

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Technical Specifications

Data Rates
T3	44.736 Mbps
E3	34.368 Mbps
Optical
Transmitter	ELED, LASER*
Receiver	PIN Diode
Wavelength	1300nm Multimode 1300nm, 1550nm Single Mode
Fiber Optic Connectors	ST or FC
Loss Budget* (1300nm, 1550nm)	Multimode (62.5/125µm): 15dB Single Mode (9/125µm): 15dB
Electrical
Connector	BNC Female
Interface	T3 or E3 (G.703)
T3 Line Code	B3ZS
E3 Line Code	HDB3
T3 Pulse Code	AMI
Impedance	75 Ohm
Diagnostic Functions System
Local and Remote Loopback, Signal Generator, Disable Alarm
* Contact factory for higher requirements

Visual Indicators
System Status	PWR A, PWR B, VccA, VccB, ALARM
T3/E3 Signal Status	CV, SIGLOS
Optic Signal Status	VLIN, RxA, RxB, USE-A, USE-B
Alarm
Dry Contact	Normal OPEN
Switching Voltage	80VDC, Max
Switching Current	0.5A, Max
Switching Power	10W, Max
Power
Standard	12VDC @ 400mA
Optional	24VDC, -48VDC, or 115/230VAC (with external power cube)
Temperature
Operating	-10° to 50°C
Hi-Temp (optional)	-20° to 70°C
Storage	-40° to 90°C
Humidity	95% non-condensing
Physical (Standalone/Wallmount Unit)
Height	(3.53 cm) 1.4"
Width	(18.14 cm) 7.1"
Depth	(24.89 cm) 9.8"
Weight	(907 gm) 2.0 lbs