MultiModemISDN User Guide

 

&E3

Disable flow control by the TA

 

&E4

Hardware flow control. &E4 causes the TA to use the CTS signal on

 

 

pin 5 of the RS232E/V.24 interface to regulate flow control. When

 

 

CTS goes low, data flow from the computer is suspended until CTS

 

 

goes high again. This method works with pacing, which uses the

 

 

RTS signal on pin 4. Hardware flow control cannot be enabled

 

 

unless an error correction protocol is selected.

 

&E5

XON/XOFF flow control. This is an in-band method, in which the

 

 

XON and XOFF characters (^Q and ^S, respectively) are inserted

 

 

into the data stream, rather than using separate control lines. When

 

 

an XOFF character is detected, the data stream is suspended until

 

 

an XON character is detected. The drawback to this method is that

 

 

some files may contain these characters, causing the file transfer to

 

 

be suspended indefinitely.

 

&E6

When XON/XOFF pacing is active, TA responds to and discards the

 

 

XON/XOFF characters from the computer.

 

&E7

When XON/XOFF pacing is active, the TA responds to the XON/

 

 

XOFF characters and passes them through the communications link

 

 

to the remote device, thereby pacing the remote terminal adapter as

 

 

well.

 

&E12

Disables pacing

 

&E13

Enables pacing

Command: #Xn

 

Function:

Send Single/Multiple Xoff Characters

Values:

n = 0 or 1

Default:

#X0

 

Description: Allows TA to send either a single or multiple Xoff characters to exert flow

 

control to the terminal.

 

The #X0 command (factory default setting) causes one Xoff to be sent until

 

the MTA128ST-USB's buffer reaches the Xon level. The#X1 command uses

 

an Xoff to be sent for every character received after TA reaches its buffer full

 

level.

 

 

#X0

One Xoff character sent until buffer reaches the Xon level (default)

 

#X1

Multiple Xoff characters sent for every character received after buffer

 

 

reaches the full level

Command: &Fn

 

Function:

Load Quick Setup Profile

Values:

n = 0–4

 

Default:

&F0

 

Description: For quick setup, the TA includes six Quick Setup Profiles, each contains

 

configuration parameters for a specific type of port operation. To load a

 

Quick Setup Profile into active memory, use &Fn, where n is the profile

 

number to load.You then can customize the profile and store it using the &W

 

command, so it loads automatically on power-up or reset. These profiles are

 

stored in permanent memory and are not user configurable. (Appendix B.)

 

&F0

Profile 0 — Modem-like operation (default)

 

&F1

Profile 1 — V.110 async operation*

 

&F2

Profile 2 — V.120 async operation

 

&F3

Profile 3 — X.75 async operation

 

&F4

Profile 4 — MLPPP async operation

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