Insys Modem 336 LL 2D 5.0 11-02-01-01-31.018 사용자 설명서

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11-02-01-01-31.018
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INSYS Modem 336 LL  
i-modul Modem 336 LL 
 Basics 
 
Aug-06 
            5 
 
 
Note 
For INSYS Modem 336 LL 4.1 and i-modul 336 LL 3.0: 
Use AT&L<n> to switch between two wire operation (AT&L0) and 
four wire operation (AT&L1).
 
During four wire operation, one pair each is needed for each transmission path (Origi-
nate → Answer and Answer → Originate). This will prevent problems with the terminat-
ing set (the part of the modem which separates received and sent data) for strongly mal-
adjusted lines. 
Four wire line 
 
 
 
Note 
For leased line modems, it is required that one modem is operated 
in originate mode and the other modem in answer mode
For the connection start, the same protocols are used for switched line and leased line 
operation. 
The manufacturer will deliver completely pre-configured devices – Originate or Answer – 
for two wire operation. 
The difference lies in the factory settings for the S registry values (ATS11 und ATS7).  
Originate: 
ATS11=3
ATS7=50 
Answer: 
ATS11=1
ATS7=30 
 
 
Note 
For leased line modems, the same AT commands and S registries as 
for switched line modems apply (see the Designer’s Guide i-modul 
Modem or the User Manual INSYS Modem 336/56k) The only dif-
ference is the registry ATS11. For the switching line modem this 
setting defines the DTC time setting, and for the LL modem it de-
fines the switching between Originate and Answer.
 
 
Basically, all connection protocols, error correction and compression methods which are 
used for switched line operation, may also be used for the leased line mode. The AT 
commands to set the desired protocol are identical to those of the switched line modem. 
 
i-modul 336 LL / 
INSYS Modem 336 LL 
 
Answer 
i-modul 336 LL / 
INSYS Modem 336 LL 
 
Originate 
LB1 
LB 
LA 
LA1 
LB1 
LB 
LA 
LA1