192 CHAPTER 15: CONFIGURING ISDN PROTOCOL
Configure ISDN DoV ISDN call includes voice call and digital call. Different communication mode makes
different calls. In common circumstances, users initiate voice call when making
voice communication and initiate digital call when making data transmission. ISDN
DoV (Data over Voice) can firstly establish connections by voice call, and then
begins data transmission. ISDN DoV can apply to such conditions as digital call is
disabled (for example, long-distance call). However compared with digital call,
ISDN DoV has some disadvantages. It cannot guarantee correct data transmission
all the time and needs ISDN network support.
1Configure Calling Method for Initiating a Connection on an Interface
For an interface generating ISDN calls, you must set the call type to either voice
call or data call.
Perform the following configuration in dialer interface or ISDN interface view.
Tabl e 226 Configure an interface for voice calls
2Configure Call Processing Method on an Interface
On an interface receiving ISDN calls, you can configure it to process calls as either
voice calls or data calls. Regardless of how it processes a call, however, the packets
transmitted over the established connection are data packets.
Perform the following configuration in ISDN interface view.
Tabl e 227 Configure an interface to receive voice calls
Display and Debug ISDN Perform the display and debugging commands in all views.
Tabl e 228 Display and debug ISDN
Operation Command
Configure an interface to initiate connection using voice
calls dialer data2voice
Configure the interface to initiate connection using data
calls undo dialer data2voice
Operation Command
Configure an interface to process the received calls as
voice calls Isdn voice2data
Configure the interface to process the received calls as
data calls undo isdn voice2data
Operation Command
Display the current activated call
information of ISDN interface display isdn active-channel [
interface type number ]
Display the value of ISDN DSS1 signaling
timer display isdn q931-timer
Display the value of ISDN QSIG signaling
timer display isdn qsig-timer [ interface
type number ]
Display the current status of ISDN interface display isdn call-info [ interface
type number ]
Enable the debugging of ISDN CC debugging isdn cc [ interface type
number ]
Enable the debugging of ISDN q921
protocol debugging isdn q921 [ interface
type number ]
Enable the debugging of ISDN q931
protocol debugging isdn q931 [ interface
type number ]