Black Box ME265C User Manual download pdf

RATE

Modem

Elimin.

Elastic

Buffer

INT.

Conv.

RD-2TD-2RD-1TD-1PWR

0 - 2.048 K 8 - 48 K

1 - 1.544 K 9 - 56 K

2 - 1.024 K A - 64 K

3 - 768 K B - 112K

4 - 512 K

5 - 384 K

6 - 256 K

7 - 128 K

Chassis Gnd

Disconnect

Connect

Mode Select

JP6

JP7

JP5

CTRL

JP4

CTRL

JP3

INT

EXT

JP2

JP1

0 ms

6 ms

51 ms

0 ms

6 ms

51 ms

DCD for Port 2

DCD for Port 1

Transmit Timing

RTS/CTS Delay Port 1

RTS/CTS Delay Port 2

PWR

TD-1 RD-1 TD-2 RD-2

Int.

Conv.

Elastic

Buffer

Modem

Elimin.

MODE

0 - 2048 K 8 - 48 K

1 - 1544 K 9 - 56 K

2 - 1024 K A - 64 K

3 - 768 K B - 112 K

4 - 512 K

5 - 384 K

6 - 256 K

7 - 128 K

Specifications:

Transmission Format: Synchronous

Transmission Mode: Full- or Half-Duplex

Timing: Internal Clock (user-selectable from front-panel switch): 48, 56,

64, 112, 128, 256, 384, 512, 768, 1024, 1544, and 2048 Kbps.

External Clock: Up to 2048 Kbps

RTS/CTS Delay: Internal Jumpers; 0, 6, or 51 ms.

DCD: Internal Jumpers; Continuously ON or controlled by the RTS signal

Elastic Buffer Size: (2) buffers, 256 bits each.

Connectors: Determines the modules that are inserted.

Power: ME260A;115VAC, 60 Hz, 5watts. ME260AE;230VAC, 50 Hz,

5 watts

Maximum Distance: 330 ft.

Interface Modules:

ME261C: Interface = RS-232; (1) DB25 female connector.

ME262C: Interface = V.35; (1) M/34 Block female connector.

ME263C: Interface = X.21; (1) DB15 female connector.

ME265C: Interface = RS422/RS449; (1) DB37 female connector.

ME266C: Interface = G.703; (1) DB15 female connector.

ME267C: Interface = Coax; (1) Coax female connector.

ME268C: Interface = T1; (1) DB15 female connector.

Jumper Settings:

JP1: Selects the delay between the activation of the RTS line in connector J2

and the acitvation of the CTS line in the same connector.

JP2: Selects the delay between the activation of the RTS line in connector J1

and the activation of the CTS line in the same connector.

JP3: Selects the timing source in the ME mode:

INT: Modular Modem Eliminator internal oscillator. The data rate is

determined by the RATE selector.

EXT: The transmit clock applied to connector J1. The data rate

equals the clock rate.

JP4: Carrier Detect: (ME mode ONLY)

ON: The DCD line in connector J2 is continuously on.

CTRL: The DCD line in connector J2 follows RTS

JP5: Carrier Detect: (ME mode ONLY)

ON: The DCD line in connector J1 is continuously on.

CTRL: The DCD line in connector J1 follows RTS

JP6: Selects the Modular Modem Eliminator operating mode:

ME = Modem Eliminator

IC = Interface Converter

TE = Elastic Buffer

JP7: Connects of Disconnects signal ground to chassis ground.

Operating Modes:

Modem Eliminator Mode: The unit is used to connect two DTE's, thereby

replacing two synchronous modems. The interface-conversion

function of the unit allows connecting even DTE's with different

interfaces, in addition to the modem-eliminator function. In this

mode, the unit fully emulates the operation of two modems

connected in a link (one for each DTE). This includes supplying

clock signals and handshaking control signals. The data rate is

derived from an internal oscillator, and is selected by mean of the

front-panel switch. Any standard rate in the range of 48 Kbps to

2048 Kbps can be selected. Both modules can also use External

Timing: With External Timing, the unit accepts an external clock in

the range of 1.2 Kbps to 2048 Kbps. This permits the transfer of

system timing from one side to the other (clock locking). The

maximum range that can be archieved depends on the interface

type, cable type, and data rate, and can be up to 330 ft.

Interface-Converter Mode: In this mode, lets you connect a DTE device to a

DCE device that has a different interface. A physical and electrical

conversion between the DTE and DCE interfaces is performed.

The data rate is determined by the equipment connected to the unit.

Elastic Buffer Mode: This mode is used to connect two independentlyclocked

plesiosynchronous DCE's via FIFO buffers. By providing

bi-directional buffering of data, the unit reduces loss of data that

would otherwise occur because of the difference in clock rates.

The two DCE's can have similar or different interfaces, and the

data rate can be up to 2048 Kbps.

BLACK BOX

ME260A

Summary of Contents

Page 1 - Operating Modes:

6RATEModemElimin.ElasticBufferINT.Conv.RD-2TD-2RD-1TD-1PWR0 - 2.048 K 8 - 48 K1 - 1.544 K 9 - 56 K2 - 1.024 K A - 64 K3 -

Black Box ME265C User Manual

Browse online or download User Manual for Networking Black Box ME265C. ME260A - Black Box

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Black Box ME265C User Manual

Browse online or download User Manual for Networking Black Box ME265C. ME260A - Black Box

Summary of Contents

More documents for Networking Black Box ME265C

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