Cisco PVDM2-12DM, PVDM2-24DM, and PVDM2-36DM Digital Modem Packet Voice Data Modules
How to Configure Digital Modem PVDM2s
12
Cisco IOS Release 12.4(9)T, 12.4(11)XW, and 12.4(20)T
When
dtmf dnis
is part of the
ds0-group
command, functions in CSM V12 firmware collect the
digits of the called number and match them to the called number in the appropriate modem pool,
putting the call through. If
dtmf dnis
is not part of the
ds0-group
command, these functions are
never activated and no called number match is made, resulting in a default pool modem being used
instead of a modem from the correct pool. The call will not go through in such a case.
SUMMARY STEPS
1.
modem-pool
name
2.
pool-range
modem1-modemN
3.
called-number
number
max-conn
number
DETAILED STEPS
Configuring Modem Recovery
The modem recovery feature is present to detect bad modems and mark them, saving the user from the
task of doing this manually. If there are spare modems in the platform, this process could prevent callers
from getting dead air or busy signals.
The modem recovery feature uses two CLI commands. The
modem recovery threshold
command sets
the number of consecutive failures that a modem must experience before the recovery process is
performed. The
modem recovery action
command defines the action taken on the failed modem. The
recovery action will either be “disable”, where the IOS will mark the modem bad, or will be “none”,
where nothing will happen to the modem and the threshold counter will be reset.
A modem failure is defined as any time that the CSM assigns a call to a modem, but that modem does
not reach steady state. The call would be classed as a “no answer” or as a trainup failure.
To configure modem recovery, enter the following commands in global configuration mode.
SUMMARY STEPS
1.
modem recovery threshold
failed-calls
2.
modem recovery action
{
disable
|
none
}
Command or Action
Purpose
Step 1
modem-pool
name
Example:
Router(config)# modem-pool tito
Assigns a name to the modem pool.
Step 2
pool-range
modem1-modemN
Example:
Router(config)# pool-range 386-388
Specifies the range of modem numbers assigned to
the modem pool.
If the modem pool consists of a single modem, the
modem number of that modem is entered by itself, as
in
pool-range 386
, for example.
Step 3
called-number
number
max-conn
number
Example:
Router(config)# called-number 5557528 max-conn 3
Specifies a called number assigned to the modem
pool. The variable
max-conn
specifies the
maximum number of simultaneous calls that may be
connected to the called number.
