Rm With Digital Interface; Service Channel - Siemens SWT-3000 Equipment Manual

SWT 3000 Equipment Manual
RM signaling can only be transmitted at 50Bd via the analog interface. In this case the guard tone
frequency is used for transmitting the RM data. The following points must therefore be observed:

RM with digital interface

RM signals can be transmitted via digital interfaces LID-1 and LID-2 at 50Bd or 300 Bd.
With all-digital operation RM signaling is at 300 Bd. In mixed analog/digital operation transmission
is at 50Bd.
Service channel (SC)
The service channel (SC) is a transparent data channel (format 9600 bit/s, 8 data bits, 1 start bit,
1 stop bit, no parity) that is only available when using a digital line interface (LID-1 and/or LID-2). It
is available to the user as an asynchronous serial RS232 interface. The SC is electrically con-
nected via the PU3 line connector*). Transmission is always carried out via the active digital line in-
terface.
Figure 16:
© SIEMENS AG 2008
RM only works when the guard tone is transmitted.
Every command tone interrupts the RM transmission
RM operation is not possible with continuous signaling
Configuration of remote access via LAN
Edition p3_3_2x 08/09
Functional Description
Page - 35