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TC1630R/S User's Manual
Rev. 2.5
Chapter 1 - Overview
Description
The Model TC1630R/S is a T1/E1 Fiber Optic Modem that converts analog T1 or E1 signals to digital fiber
optic signal and vice versa. TC1630R is for 19" rackmount and TC1630S is for standalone unit. Both have
the same functions and features, the only difference is power connectors. For convenience, TC1630R/S and
TC1630 will be used interchangeably throughout this manual.
TC1630 offers advanced features such as digital transmission, jitter removal and a field replaceable Line
Interface Module. Because it is based on modern FPGA (Field Programmable Gate Array) technology, the
IC chip counts are reduced to a minimum, hence offering extremely low power consumption (less than 3
watts) and higher reliability.
Transparent to the framing format, the TC1630R/S’s T1/E1 interface shapes the transmit pulse to support
CCITT G.703, or, for connecting to DSX-1 cross connects, copper line distances are from 0 to 655 feet. The
internal elastic buffer removes jitter from transmit data.
The TC1630R/S has multiple LED indicators to ease installation and troubleshooting. These LEDs indicate
power, operating voltage, alarm status, local and remote T1/E1 signal loss, bipolar violations, all ones warning,
Optic signal sync active and more. Eight DIP switches, accessible from the front panel, control settings for
Line Code, Line Length, Local Loopback and Remote Loopback. The dry contact alarm relay switch
provides remote alarm monitoring capability.
The TC1630R/S is compatible with all types and sizes of fiber optic cable. Fiber optic connectors are ST
(optional FC). T1 or E1 signal can be connected to two pairs feed-thru detachable terminals or a RJ-48C
connector at the rear panel. Input power is 12V DC or 115/230V AC with an external power cube. Alternate
power sources are available as an option (see Chapter 6 - Specifications).
Note: The terms "TC1630R/S" and "TC1630" are used interchangeably in this manual.
Figure 1. Typical Point-to-Point T1/E1 Application
CSU/DSU
TC1630R/S
TC1630R/S
CHANNEL
BANK/
CUSTOMER
TERMINATION
DEVICE
T
1
/
E
1
T
1
/
E
1
T
1
/
E
1
T
1
/
E
1
OPTIC
Tx
OPTIC
Tx
OPTIC
Rx
OPTIC
Rx
