
CHAPTER 10: Switching Configuration
125
For
Dual
port
Idle State:
DTR can be
high
or
low
. The
Multiserver holds DSR, CTS, CD,
and RI
low
.
1. Multiserver raises DSR, CTS, and CD.
2. If DTR is
high
, no response is required.
If DTR is
low
, device must raise DTR
within 60 seconds.
3. If ABR is enabled, then a
<cr>
will be
forwarded.
Disconnect Sequence
For
Dual
port that is connected as a
Calling
port:
1. Device initiates
<break><break><break>
.
2. Multiserver sends the
ENTER CLASS
prompt.
or
1. Device drops DTR.
2. Multiserver drops CTS, DSR, and CD.
The port is now in the idle state.
or
1.
Receiving
device disconnects.
2. Multiserver drops CTS, DSR, and CD.
The
Calling
port (in this case, the
Dual
port) is now in the idle state.
For
Dual
port that is connected as a
Receiving
port:
Initiated by device:
1. Device initiates
<break><break><break>
.
2. Multiserver drops CTS, DSR, and CD.
The device can now make or receive
calls.
or
1. Device drops DTR.
2. Multiserver drops CTS, DSR, and CD.
The device can now make or receive
calls.
or
Initiated by Multiserver (or remote end):
1.
Calling
device disconnects.
2. Multiserver drops CTS, DSR, and CD.
The called device can now make or
receive calls.
For
Calling
port
Initiated by device:
1. Device initiates
<break><break><break>
.
2. Multiserver sends the
ENTER CLASS
prompt.
or
1. Device drops DTR.
2. Multiserver drops CTS, DSR, and CD.
The port is now in the idle state.
or
Initiated by Multiserver (or remote end):
1.
Receiving
device disconnects.
2. Multiserver sends the
ENTER CLASS
prompt.
For
Receiving
port
Initiated by device:
1. Device initiates
<break><break><break>
.
2. Multiserver drops CTS, DSR, and CD.
3. Port is marked out-of-service until device
acknowledges disconnect by dropping
then raising DTR.
or
1. Device drops DTR.
2. Multiserver drops CTS, DSR, and CD.
3. Port is marked out-of-service until device
acknowledges disconnect by dropping
then raising DTR.