User manual

CHAPTER 4: GENERAL INFORMATION AND FEATURES
4.16 ITU-T V.13/ V.23 Simulated Carrier Control in Half Duplex
The modem normally operates in full duplex. mode. However, some applications may
requires control of a remote DCD signal by a local RTS signal. V.13/ V.23 operation
allows local RTS control of remote DCD signal without on-off carrier switching in
half duplex operation.
The V.13/ V.23 function apply to the SNA network and the related setting is located
in "DCD control" under "CONFIG DTE" menu.
4.17 PASSWORD AND CALLBACK FUNCTIONS
4.17.1 Dynamic Password/CallBack:
Special Control codes below can be utilized to assign Dynamic Login Password or
Call Back Phone Number (work with both AT command dialing string and front panel
dialing operation):
a. ‘
<’ +<string>: Control code for Dynamic Password assignment. <string> after ‘<’
will be sent to ANS modem as Password. It overrides the setting in ‘Send
Password’, but will be ignored if ‘Send Password’ = ‘Off’.
b. ‘
>’ +<string>: Control code for Dynamic Call Back Number assignment. <string>
after ‘
>’ will be sent to ANS modem as the desired Dial Back Number. After ANS
modem authenticated ORG modem, it will call back with <string>. This Control
code overrides the setting of ‘Call Back No.’ in ORG modem. If ‘Send Password’
= ‘Off’ on ORG modem or ‘Call Back No.’ = ‘Disable’, this character will be
ignored.
4.17.2 Extension Code for Stored Phone Numbers (‘+’+<char>):
If the last two digits of Stored Phone Number is ‘+’+<char>, modem will dial current
number and continue on with specific stored number as designated by <char>. <char
>
is the stored phone number order(#n). (any other characters after
<chart> will be
omitted)
For example: ATDT1234+5 will force the modem to dial 1234 and the number stored
in #5. Total number in a dial string should not exceed 250 characters. The ‘+’ Code
should not appear in Call Back Number or it will be ignored when ANS modem
calling back.
4.17.3 Additional Information:
a. Front Panel LCD will show “Call Back” to indicate it is under Call Back mode:
When ANS modem is waiting under ‘Call Back Timer’ to call back.
b. When ORG modem dial with Dynamic Call Back Control Code “
>”+<string> and
sending Password for authentication(no matter send with ‘Send Password’ or
Dynamic Password): ANS modem will save received Password, and send it back
while Call Back link was built. And it overrides the setting in its own ‘Send
Password’.
c. When modem is under Call Back operation, VO/DA can be used to cancel
procedure.
d. When applying Password or Call back Security function, ‘PROTOCOL’ setting in
both modems should be identical.
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