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2

Approvals:

UL

®

; FCC Class B, Part

68; CSA; CE

Operation:

Full duplex

Maximum Speed:

33,600 bps

Standards: 

Up to V.34

Interface:

MC119A, MC119AE: 

Requires standard digital 
Northern Telecom wall jack;

MC120A, MC120AE: Requires 

standard AT&T or Lucent 
wall jack; 

MC121A, MC121AE: Requires 

standard Siemens ROLM

®

wall jack

Connectors: 

MC119A, MC119AE,

MC121A, MC121AE: 

(3) RJ-11 (wall socket, digital 
phone port, analog modem 
port);

MC120A, MC120AE: (2) RJ-45 

(wall socket, digital phone 
port); (1) RJ-11 (analog modem
port)

Power: 

18 VDC adapter, available in

110- (MC119A, MC120A, MC121A)
or 220-VAC (MC119AE, MC120AE,
MC121AE) models

Size: 

7.4"H x 3.9"W x 1.8"D 

(18.8 x 9.9 x 4.6 cm)

Weight: 

17 oz. (482 g)

Linc Up Plus Connections

Specifications

C

onnecting a digital phone to the
Linc Up Plus doesn’t change or

affect the operation of the digital
telephone set. You’ll make voice
calls exactly the same way you do
without the Linc Up Plus.

For incoming calls:

The Linc Up Plus detects a

ring signal from the PBX and
generates a ring signal for the
analog modem port and for the
digital phone port. If the digital
phone is taken off-hook, the Linc
Up Plus stops the ring signal to
the analog modem port and a
normal phone call ensues. 

If the equipment connected to

the analog modem port goes off-
hook, the ring signal to the digital
phone port is stopped and the
analog modem port connects
to the PBX until the equipment
connected to the analog modem
port goes on-hook.

For outgoing calls:

When handling outgoing calls,

all Linc Up Plus models detect the
analog equipment going on-hook
the same way. That is, when the
on-hook is detected, the devices
generate an on-hook message to
the PBX and logically reconnect
the digital phone to the PBX. And
if the digital phone is also off-hook,
the call isn’t terminated.

But when it comes to handling

off-hook functions of equipment
connected to the analog modem

port, the AT&T/Lucent and
Siemens ROLM models operate
differently from the Northern
Telecom model. 

For AT&T/Lucent and Siemens

ROLM models: When equipment
connected to the analog modem
port goes off-hook, they detect
this, disable the digital telephone’s
ability to transmit, generate an off-
hook message to the PBX, and
connect the analog equipment
to the PBX line. If the digital
telephone is already in use and
the analog equipment goes off-
hook, the connection established
by the digital telephone isn’t
terminated. But the digital
telephone’s ability to transmit is
disabled, and anything transmitted
by the analog equipment is sent to
the connection established by the
digital telephone.

For the Northern Telecom

model: When the equipment
connected to the analog modem
port on it goes off-hook, the Linc
Up Plus detects this, disables the
digital telephone’s media stream
to the PBX, generates an off-hook
message to the PBX, and
connects the analog equipment
media stream to the PBX line. If
the digital telephone is already in
use and the analog equipment
goes off-hook, the connection
established by the digital
telephone isn’t terminated.

Technically Speaking

Ordering Information

ITEM

CODE

Linc Up Plus

Northern Telecom   110-VAC (U.S.)....................MC119A

220-VAC (Europe)............MC119AE    

AT&T or Lucent        110-VAC (U.S.)....................MC120A

220-VAC (Europe)............MC120AE

Siemens ROLM        110-VAC (U.S.)....................MC121A

220-VAC (Europe)............MC121AE

Phone Jack

at the Wall

AC Power at

the Wall

AC

Adapter

Phone

PC or

Macintosh

®

Linc Up

Plus

Fax/Modem
“Line” Jack

Lucent (AT&T) Definity or System
75 PBX, and its digital RJ-45 phone
port connects to Lucent digital
phones (7401, 7404, 7405, 7406Plus,
7407, 7407Plus, 7410, 7434, 7444,
8403, 8410, and 8413).

Linc Up Plus, Siemens

®

ROLM

Order this Linc Up Plus to

connect to your Siemens ROLM
phone system at the office wall
jack. With it, analog telephone
equipment can be used on a
Siemens ROLM digital PBX
telephone line. Specifically, use its
wall socket RJ-11 port to connect
to the PBX and its digital RJ-11
phone port to connect a Siemens
digital phone (100, 200, 300, 400,
and 600 series).

• Linc Up Plus

• Power supply

• (1) RJ cable

• Users’ manual

Package Includes

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