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

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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

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#11835

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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)

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TECH SPECS

Budget (Maximum) —

MT612A-ST, MT651A-ST-R2, MT619A-ST-R2, MT651C:

20 dB over 62.5/125-µm multimode fiber cable;

MT650A-ST-R3, MT653A-ST-D48-R3, MT618A-ST-R3, MT620AE-R2,

MT650C-R2: 22 dB over 9/125-µm single-mode fiber cable

Compliance —

EMI/RFI: CE; FCC Part 15 Subpart B Class A, IC Class/classe A;
Safety: EN 60950, EN 41003

Data Rate (Maximum) —

T1: 1.544 Mbps;
E1: 2.048 Mbps

Diagnostic — Dry-contact closure alarm on various DB15 pins

(standalone models) or RackNest DB25 pins (card models) for signal
or power loss; minimum switching current 1 A

Distance (Maximum) —

MT612A-ST, MT618A-ST-R3: 3.1 mi. (5 km);
MT651A-ST-R2, MT651C: 4.3 mi. (6.9 km);
MT650A-ST-R3, MT653A-ST-D48-R3, MT620AE-R2, MT650C-R2:

31 mi. (49.9 km);

MT619A-ST-R2: 1.5 mi. (2.4 km)

Dynamic Range — 28 dB
Output Power —

Single-mode: -12 dBm;
Multimode: -18 dBm

Overvoltage Protection —

AC/DC overvoltage circuits are connected through transformers to
transmit and receive lines

Receiver Sensitivity —

For a BER of 10-9:

MT612A-ST, MT651A-ST-R2, MT619A-ST-R2, MT651C: -38 dBm;
MT650A-ST-R3, MT653A-ST-D48-R3, MT618A-ST-R3, MT620AE-R2,

MT650C-R2: -40 dBm

User Controls — MT612A-ST: Internal: (1) 4-position DIP switch,

(6) 2-position jumpers, (1) 5-position jumper;
All other models: (1) front-mounted slide switch for test mode;
All others mounted on main board (internal):

(1) jumper block for interface type;

(1) jumper and (3) DIP switches for grounding control

and signal loss handling

Video Standards — VGA, SVGA, XGA, XGA-2
Zero Suppression — B8ZS when set to T1, HDB3 when set to E1
Interface —

Electronic: Either 100-ohm balanced T1, 120-ohm balanced E1,

or 75-ohm unbalanced E1, user-selectable; with card models,

unbalanced E1 requires special adapter— call Technical Support;
Optical: MT612A-ST: 820-nm multimode;

MT651A-ST-R2, MT619A-ST-R2, MT651C: 850-nm multimode;

MT650A-ST-R3, MT653A-ST-D48-R3, MT618A-ST-R3,

MT620AE-R2, MT650C-R2: 1300-nm single-mode

Connectors —

Standalone models (all rear-mounted):

For fiber optic link: (2) ST F;
For balanced T1 or E1 I/O and for dry-contact alarm: (1) DB15 F;
For unbalanced E1 I/O: (2) BNC F;
For power:

MT653A-ST-D48-R3: (1) standard 3-pin F;
All other models: (1) IEC 320 M inlet;

Card models:

For fiber optic link:

(2) front-mounted ST F; Rear-mounted card-edge F linked to

connectors on rear of RackNest 2/14;
For balanced T1/E1: (1) 5-position terminal block;
For unbalanced E1: Special plug-in adapter required—

call Technical Support;
For dry-contact alarms: (1) DB25 F

Indicators — MT612A-ST: (2) LEDs: (1) Power, (1) Link;

All other models: (6) or (7) front-mounted LEDs: Power, local

loopback, remote loopback, and various error conditions

Temperature Tolerance — 32 to 122°F (0 to 50°C)
Humidity Tolerance — Up to 90% noncondensing
Power —

MT612A-ST, MT651A-ST-R2, MT650A-ST-R3: 100–240 VAC, 50/60 Hz,

autosensing from AC source through included detachable input
cord;

MT653A-ST-D48-R3: -48–60 VDC, autosensing at 130 mA, nominal,

from -48-VDC source through detachable cord (included);

MT619A-ST-R2, MT618A-ST-R3: 108– 132 VAC/207– 253 VAC,

47– 63 Hz, autosensing, from AC source through included
detachable input cord;

MT620AE-R2: 230 VAC, 50 Hz;
MT651C, MT650C-R2: From the RackNest 2/14 in which

they’re installed;

Consumption for all models: 6 W maximum

Size — MT651A-ST-R2, MT650A-ST-R3, MT653A-ST-D48-R3:

1.7"H x 9.4"W x 6.7"D (4.4 x 23.9 x 17 cm);

All other standalone models: 1.75"H (1U) x 7.6"W x 9.6"D

(4.4 x 19.3 x 24.4 cm);

Card models: 6.2"H x 0.9"W x 9"D (15.7 x 2.3 x 22.9 cm)

Weight — Standalone models: 2.4 lb. (1.1 kg);

Card models: 0.8 lb. (0.4 kg)

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AC-powered standalone models include a manual and

a detachable power cord; card models include a manual.

The DC-powered MT653A-ST-D48-R3 includes a manual

and a DC power-supply connector kit. You have to
assemble this connector and use it to terminate the DC
power cord that will plug into the Fiber Optic Line Driver.

WHAT‘S INCLUDED

Item Code

T1 Fiber Optic Line Driver ST, Standalone

820-nm Multimode

MT612A-ST

T1/E1 Fiber Optic Line Driver ST, Standalone

850-nm Multimode

MT651A-ST-R2

1310-nm Single-Mode MT650A-ST-R3
1310-nm Single-Mode, -48-VDC MT653A-ST-D48-R3

T3 Fiber Optic Line Driver ST, Standalone

850-nm Multimode

MT619A-ST-R2

1310-nm Single-Mode MT618A-ST-R3

E3 Fiber Optic Line Driver, Standalone

1310-nm Single-Mode, 230-VAC

MT620AE-R2

T1/E1 Fiber Optic Line Driver ST, Card

850-nm Multimode

MT651C

1310-nm Single-Mode MT650C-R2

To rackmount your cards, you’ll need…

RackNest 2/14

115-VAC, Single Power Supply

RM110A

115-VAC, Dual Power Supply RM110A-2PS
230-VAC, Single Power Supply RM110AE

For optimum performance and a 20% savings, order…

Multimode Duplex Fiber Optic Cable, Riser, ST–ST,

Custom Lengths

EFN110-STST

Single-Mode Duplex Fiber Optic Cable, PVC, ST–ST,

Custom Lengths

EFN5009

T1 Cable, DB15 Male/DB15 Male, Straight-Pinned,

10-ft. (3-m)

ETNMS02-0010

T1 Cable, DB15 Male/RJ-48C Male, Straight-Pinned,

10-ft. (3-m)

ETNMS03-0010

The tables below show the pinouts of the connectors on
the T1/E1 Fiber Optic Line Drivers that carry the T1/E1 and dry­contact alarm leads. The pinning shown for the T1/E1 signals
on the DB15 connector of the standalone models is widely used,
so if you’re only using these signals, our standard cables should
work.

The pinning of the dry-contact leads is proprietary. Their
arrangement on DB15 is the same as that used by our earlier
standalone fiber optic line drivers (MT610 through MT613),
so if you already have cables built for those, they should still
work. If you need cables incorporating these leads, please call
us for a quote.

Technically Speaking

MT612A-ST

Standalone Card

Alarm

(on DB15) (on RackNest’s DB25)
Pins 8 and 7 Pins 10 and 22 Minor alarm (normally closed)
Pins 8 and 15 Pins 10 and 21 Minor alarm (normally open)
Pins 6 and 5 Pins 13 and 25 Major alarm (normally closed)
Pins 6 and 13 Pins 13 and 24 Minor alarm (normally open)

Buyer’s Guide

Dry-contact alarm leads (optional)

Standalone Card

(on RackNest’s Signal

(on DB15) 5-position terminal block)

N/A Top terminal

Ground (optional,

attach at one end only!)

Pin 1 Either TX terminal

Send Data Tip (Transmit Data A,

input to fiber optic line driver)

Pin 9 Either TX terminal

Send Data Ring (Transmit Data B,

input to fiber optic line driver)

Pin 3 Either RX terminal

Receive Path Tip (Receive Data A,

output from fiber optic line driver)

Pin 11 Either RX terminal

Receive Path Ring (Receive Data B,
output from fiber optic line driver)

Buyer’s Guide

Balanced T1/E1 leads