Cisco PVDM2-12DM, PVDM2-24DM, and PVDM2-36DM Digital Modem Packet Voice Data Modules
How to Configure Digital Modem PVDM2s
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Cisco IOS Release 12.4(9)T, 12.4(11)XW, and 12.4(20)T
Configuring the ISDN Switch Type and PRI Group
Perform the following steps to properly connect with the ISDN central office and to define the group of
timeslots used.
SUMMARY STEPS
1.
isdn switch-type
switch-type
2.
pri-group timeslots
timeslot-range
DETAILED STEPS
Configuring the ISDN D-Channel Serial Interface
When you configure ISDN PRI on a channelized E1 or channelized T1 controller, you create a
corresponding D-channel serial interface used to carry signaling messages for that PRI group. For E1
modules, channel 15 is the D-channel. For T1 modules, channel 23 is the D-channel. You must configure
this signaling interface in order to receive incoming and modem calls.
The PRI network modules and interface cards for your router can have either one or two ports; therefore
you might have multiple D-channels to configure.
To configure the ISDN D-channel serial interface for E1 or T1 controllers, perform the following tasks,
beginning in global configuration mode:
SUMMARY STEPS
1.
interface Serial
slot/port:channel
2.
no ip address
3.
encapsulation ppp
4.
isdn incoming-voice modem
5.
no fair-queue
6.
no cdp enable
Command or Action
Purpose
Step 1
isdn switch-type
switch-type
Example:
Router(config)# isdn switch-type primary-qsig
Specifies the central office switch type on the ISDN
interface.
See the Cisco IOS Release 12.4 Master Commands List for
a complete listing of supported signaling methods.
Step 2
pri-group timeslots
timeslot-range
Example:
Router(config)# pri-group timeslots 1-24
Specifies an ISDN PRI group on a channelized T1 or E1
controller.
timeslot-range
specifies the time slots that are included in
the PRI group. For T1 ports, time slots range from 1 to 24.
For E1 ports, time slots range from 1 to 31.
