Black Box MT612A-ST, MT651A-ST-R2, MT650A-ST-R3, MT653A-ST-D48-R3, MT619A-ST-R2 Specifications

Is your access point for digital service

painfully far from where you need it to be?

Not a problem.

Is your access point for digital service

painfully far from where you need it to be?

Not a problem.

Fiber Optic Line Drivers

© 2007. All rights reserved. Black Box Corporation.

FREE 24-hour Tech Support: 724-746-5500

blackbox.com

2 of 4

FEATURES

• Drive data at full T1, E1, T3, or E3
speed over fiber.

• Maximum distances up to 4.3 miles
(6.9 km) over multimode or up to
31 miles (49.9 km) over single mode!

• Optical link is immune to EMI/RFI,
surges, etc.

• Most standalone models have
autosensing power supplies.

• Card versions available.

• Perform local and remote loopback
and dry-contact alarms.

If you need to move data

at T1 or E1 speeds, but you

don’t want to (or can’t)

use a T1/E1 line to do it,

a pair of line drivers and

a spool of fiber cable will—

with no worries about

data-line tapping, surges,

or interference.

OVERVIEW

Would you like to put your high-speed computer or other
DTE device in a different room from your T1, E1, T3, or E3
CSU/DSU? In a different building? A different campus?
Or would you just like to make a connection at T1, E1, T3, or
E3 speeds without handing your entire budget to a telco for
a subscription to digital service?

Pairs of our Fiber Optic Line Drivers can pass data to each
other at full speed across multimode or single-mode fiber optic
cables. Not only does this solve device-placement problems,
it does so with optical links that aren’t susceptible to tapping,
noise, and other hazards of electrical communication.

Models with MT650 and MT653 product code prefixes
transmit and receive data on the 1310-nm wavelength into as
much as 31 miles (49.9 km) of single-mode cable. MT651 models
transmit and receive at 850 nm into as much as 4.3 miles (6.9 km)
of multimode cable. MT612A-ST models transmit and receive at
820-nm into as much as 3.1 miles (5 km) of multimode cable.
All Fiber Optic Line Drivers have common ST

®

connectors.

The various models in standalone enclosures can take
advantage of different types of site power. The MT650A-ST-R3
has an autosensing power supply and the MT620AE-R2 plugs
into European standard outlets that provide 230 VAC. The
MT653A-ST-D48-R3 can be attached to site power systems that
provide -48 VDC (a separate DC power plug is provided for
terminating a power cord).

MT650C-R2 and MT651C are card versions that can be
installed in our versatile RackNest 2/14 products. Each RackNest

can hold up to 14 cards. We offer a wide variety of line-driver
and short-haul modem cards for the RackNest. For more
information, please refer to Product Data Sheet 19273.

You can set a T1 or E1 line driver to use a 100-ohm
balanced T1 interface, a 120-ohm balanced E1 interface,
or a 75-ohm unbalanced E1 interface. On the standalone
models, the balanced interfaces are expressed on a DB15
connector, while the unbalanced interface is on a pair of
BNCs. On the card models, the balanced interfaces are
expressed on the RackNest’s 5-position terminal blocks,
and you’ll need a special adapter (call us) for the unbalanced
interface.

All T1 or E1 line drivers feature dry-contact alarm circuitry
that can alert you to problems on the T1/E1 link. The alarms
are expressed on the same DB15 connector on the standalone
models; they’re on the RackNest’s DB25 connectors for the
card models. (Refer to page 4 for a discussion of T1/E1 leads
and dry-contact pinning.) Even if you don’t use the alarms,
the line drivers have a full set of LEDs—and user-controlled
local and remote loopback capability—for quickly diagnosing
problems.

Our MT618A-ST-R3 and MT619A-ST-R2 line drivers convert
T3’s super-fast 44.736-Mbps signals to fiber optic light pulses.
The multimode unit, MT619A-ST-R2 has a range of 1.5 miles
(2.4 km)— and many of the single-mode units have a range
of 31 miles (49.9 km)!

PABX

2/26/2007
#11835

724-746-5500 blackbox.com

T1/E1 Fiber Optic Line Driver

(MT651A-ST-R2,MT650A-ST-R3,

or MT653A-ST-D48-R3)

T1/E1 Fiber Optic Line Driver

(MT651A-ST-R2,MT650A-ST-R3,

or MT653A-ST-D48-R3)

T1/E1 Fiber Optic Line Driver

(MT651A-ST-R2,MT650A-ST-R3,

or MT653A-ST-D48-R3)

T1/E1 Fiber Optic Line Driver

(MT651A-ST-R2,MT650A-ST-R3,

or MT653A-ST-D48-R3)

T1/E1 muxT1/E1 mux

Fiber optic cableTwisted pair or coax

T1 or E1

Twisted pair or coax

T1 or E1

Fiber optic cable

Twisted pair or coax

T1 or E1

Twisted pair or coax

T1 or E1

Digital Access Cross Connect

(DACS)