CHAPTER 2: Introduction
9
M
ODELS AVAILABLE
:
• T1 Fiber Mux 850-nm (MT1000A-85)
• T1 Fiber Mux 1300-nm (MT1000A-13)
• E1 Fiber Mux 850-nm (MT1000A-E1-85)
• E1 Fiber Mux 1300-nm (MT1000A-E1-13)
2.2 Physical Description
The T1 or E1 Fiber Mux is a compact unit that’s only 1U (1.75") high, so installation on a desktop or shelf is
easy. We also offer a Rackmount Kit (RM1001), which enables you to install the mux in a 19" rack.
The mux’s front panel provides LED indicators, a control connector, and a headset jack, as illustrated in
Figure 2-2. For more information about the front-panel indicators and connectors, refer to
Chapter 4
. Power
connectors, fiber optic connectors, and T1 or E1 interfaces can be accessed via the mux’s rear panel. For more
information about rear-panel connectors, refer to
Section 3.5
.
Figure 2-2. The mux’s front-panel indicators and connectors.
2.3 Functional Description
T1 and E1 Fiber Muxes contain a main circuit board, including four channel interfaces, and one fiber optic
interface board. The interfaces are described below along with descriptions of the service channel, test and
diagnostic capabilities, management and monitoring, and power requirements. An optional redundant fiber
link board for establishing a backup fiber link is also available, as is a redundant E2 link board and DC power-
supply options. (For more information, contact Technical Support.)
2.3.1 F
IBER
L
INK
I
NTERFACE
C
HARACTERISTICS
The installed fiber optic interface, which has a pair of ST connectors, complies with the requirements of
ITU-T Rec. G.956, and uses a proprietary signaling format that ensures optimum performance. To optimally
meet a wide range of system requirements, the fiber interface on the MT1000A-85 and MT1000A-E1-85 enables
operation over 62.5/125-micron multimode fibers (typical attenuation -3.5 dB/km) and features a Vertical
Cavity Surface Emitting Laser (VCSEL) type of transmitter. The interface on the MT1000A-13 and MT1000A-
E1-13 offers operation over low-loss 9/125-micron single-mode fibers (typical attenuation -0.4 dB/km at 1300
nm, and 0.25 dB/km at 1550 nm) and features a laser transmitter.
Table 2-1 lists the optical sub system’s characteristics including the maximum range over typical fiber optic
cable. The maximum range values given in the table assume a 3 dB margin.