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Configuring advanced DCC functions
Configuring an ISDN leased line
An ISDN leased line can be configured with C-DCC but not RS-DCC. This function is fulfilled through
establishing semi-permanent ISDN MP connections. Such an application requires a leased line to be
established on the PBX of your telecom service provider and has been connected to the remote
device.
To configure an ISDN leased line:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enter physical interface
view.
interface
interface-type
interface-number
N/A
3. Specify a B channel for ISDN
leased line connection.
dialer isdn-leased
number
By default, no B channel is
configured for ISDN leased line
connection.
ISDN BRI interfaces support both 64 kbps and 128 kbps leased lines. For more information, see
"Configuring ISDN."
Configuring auto-dial
Auto-dial can be used with C-DCC but not RS-DCC. With auto-dial enabled, DCC automatically dials
the remote end of connection upon each device startup without requiring a triggering packet. If the
connection cannot be established, it will retry at certain intervals. The established connection does
not disconnect due to timeout of the idle-timeout timer as it would in the traffic-triggered dial
approach. Its configuration thus voids the dialer timer idle command.
To configure auto-dial:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enter dialup interface
(physical or dialer interface)
view.
interface
interface-type
interface-number
N/A
3. Configure one or multiple
destination addresses and
dial strings that can be
auto-dialed.
dialer route
protocol next-hop-address
[
mask
network-mask-length ] [
user
hostname |
broadcast
] * dial-number
autodial
[
interface
interface-type
interface-number ]
By default, auto-dial is
disabled.
4. Set the auto-dial interval.
dialer timer autodial
seconds
Optional.
The default setting is 300
seconds.
Configuring circular dial string backup
In C-DCC, configure multiple dialer route commands for the dial strings used to call a destination
address. These dial strings are backups to each other. If DCC fails to call the remote end with a dial
string, it will select the dialer route command with the next dial string for another try.