ZyXEL Communications U-1496 series User Manual page 66

2W LEASED AT&L1 Modem connected to 2-wire leased line, the line plug should be plugged
into the jack assigned 'LEASED LINE' on the rear panel.
4W LEASED AT&L2 Modem connected to 4-wire leased line. Plug the line into the 'LEASED
LINE' jack.
For U-1496E, U-1496P, and U-1496B, only 2-wire leased lines can be used and the same phone
jack is used for both dial-up and leased line connections. Dial backup feature is not available in
this case.
POWER LEVEL
The leased line mode transmit power level of the U-1496 and U-1496R can be adjusted from 0
dBm to -27 dBm in 1 dBm increments.
LLINE TX POWER
Effective in leased line operation only. If bit 3 of S35 is set, this range will change to -12 to -27
dBm.
HANDSHAKE MODE
In a typical dial-up connection, the originating modem dials the number and waits for the
answering modem's carrier signal. The answering modem can answer the call after a specified
number of rings, or be commanded to answer the call immediately.
In a leased line connection, the communication circuit between two modems is always
connected. Dialing and waiting for rings do not happen in this situation. If these two modems
want to establish a data link, one must be designated the originator and the other the answerer.
You can set this manually or automatically.
MANUAL CONNECTION
Set the modem to leased line mode. Type asynchronous command `ATD' to the originating
modem and `ATA' to the answering modem, or press `O' on the IDLE SCREEN menu of the
originating modem and press `A' on the IDLE SCREEN of the answering modem. On U-1496E,
press the VOICE/DATA switch to make the modem go off-hook and on-line. Use the ANS/ORG
switch to select originate or answer mode.
AUTO-HANDSHAKE
If you want handshaking to automatically occur upon power-up, you have to save the leased line
configuration to the power-up profile. How to designate a profile to be a power-up profile is
described in Chapter 6: Profiles. Please remember to set the handshake mode before you save
the configuration. Be sure that one modem is set to originate mode and the other to answer
mode.
+ ORIGINATE
originate mode (Default).
ANSWER
answer mode.
AT*P0-15 The default is -9 dBm. Adjustable range is 0 to -15dBm.
AT*M0 When operating over a leased line, modem will handshake in
AT*M1 When operating over a leased line, modem will handshake in