Am Interface; Overview - 3Com MSR 50 Series Configuration Manual

AM Interface

Overview

To do...
Set the DTE-side operating
clock
Set transmit-clock or receive
clock inversion
Set the MTU
Set the CRC mode
Enable level detection
Enable data carrier detection
(DCD)
Enable local loopback
Configure the polling interval
Set line idle-mark to 0xFF
Enable RTS signal reverse
n
To set the baud rate for a synchronous/asynchronous serial interface operating
■
in asynchronous mode, use the speed command in user-interface view. Refer
to "User Interface Configuration" on page 2155
Refer to corresponding volumes for information about other synchronous serial
■
interface configurations, such as PPP/X.25/FR,
153, "IP Addressing Configuration" on page
page 1789, and
You may need to configure parameters of PPP/X.25/FR, DCC, IP addressing,
firewall, and backup center in addition.
Analog modem (AM) interfaces bring services provided by asynchronous serial
interfaces and analog modems together. Most of the configuration commands
used on asynchronous serial interfaces and modems can be directly used on AM
interfaces. When configuring an AM interface, you can treat it as a special
asynchronous serial interface.
AM interfaces provide dial-in and dial-out services for analog dial-up users.
Use the command...
clock { dteclk1 | dteclk2 |
dteclk3 | dteclk4 |
dteclkauto }
invert { transmit-clock |
receive-clock }
mtu size
crc { 16 | 32 | none }
detect dsr-dtr
detect dcd
loopback
timer hold seconds
idle-mark
reverse-rts
"Backup Center Configuration" on page
AM Interface
Remarks
Optional
The default is DCEclk for DCE
side and DTEclk1 for DTE side.
When the interface is
functioning as DCE, you do
not need to make the
configuration.
Optional
Clock inversion is disabled by
default.
Optional
The default is 1,500 bytes.
Optional
The default is 16-bit CRC.
Optional
Enabled by default.
Optional
Enabled by default.
Optional
Disabled by default.
Optional
The default is 10 seconds.
Optional
The default is 0x7E.
Optional
Disabled by default.
for related information.
"DCC Configuration" on page
623, "Firewall Configuration" on
1961.
103