Multi-Tech Systems MMV1600 owner manual SB1, SB2

operations, do not use too much of the

buffer and reduce the throughput of the other channels to

unsatisfactory levels. In such cases, the interactive user who

needs immediate

responses

would

experience

unreasonable

delays. The Response Time Priority numbers 0, 1, 2, 3 establish

the

relative

time each group of channels must wait for data. The

lower the number the shorter the wait. Since this is a channel

group command, it does not control priority per channel but per

group.

For

example,

C1R3 sets channel group 1 (channel 1

through 8) for a Response Time Priority 3. So, if you have

channels within a group doing both interactive and batch work,

the group must be set to an R0 setting or the batch

operation may

utilize too much of the group's buffer resources. An R3 number

is

the

most

efficient for throughput (allows more data to be

assembled before sending a block).

Stop Bits

The

Stop

Bit

commands

set

the

number

of

stop

bits

used

in

asynchronous

characters.

The

default

condition

is

one

stop

bit

SB1

SB1.

An

SB1

command

sets

one,

an

SB1.5

command

sets

1.5,

SB1.5

and an SB2 command sets two stop bits.

SB2

Source Node

The SN command specifies the node number of the local node.

Number This

number

is

determined by you and can be any decimal

number up to 255. It should be assigned when you are designing

SN

your network and needs to be unique to any other node in your

network.

Remember

that the node number selected will be used

by other nodes (using a DNxxx command) when accessing the

node. For example, if you assign 124 as the SN of a local node

(SN124 command), accessing that

node

from

another node

requires 124 in other nodes Destination Node number command

(DN124).

Remote Source

This command selects the Source Node Number for groups of Node Number

four channels

each:

Group Select

Group

Channel

Default

A

1-4

01

SNGA..H

B

5-8

01

C

9-12

01

D

13-16

01

E

17-20

01

F

21-24

01

G

25-28

01

H

29-32

01

The command is used when in point-to-point and multipoint (not

networking) and when

you are downline loading parameters.

This command is active only when the Select Downline Load

parameters command &SR has been selected. The format of

this command is SNGynnn where y is the group

letter and nnn

is the source node number desired (any decimal digit up to 255).

When

the

Voice/fax option is installed, the source node number

range is 0 to 31.

Word Length

The

Word

Length Select

commands

set

the

word

length

for

asyn-

Select

chronous

communications.

The

selections

available

are

5,

6,

7,

and 8 bits which correspond to WL5 through WL8.

WL5-8

Load

The

factory

default

command

resets

the

MultiMux

parameters

to

Factory

their original factory settings. They are as follows:

Parameters

Channel Speed:

19200 bps

&F

Word Length:

8 bits

Stop Bits:

One

Parity:

None

Flow Control:

XON/XOFF

Enq/Ack Control:

Off

Echo:

Off

Pacing:

Off

Pass EIA:

Off

Pass Xon/Xoff:

Off

Dest Node:

01

DSU Link:

A