для Cisco Cisco IOS Software Release 12.4(2)XB6
Integrating Data and Voice Services for ISDN PRI Interfaces on Multiservice Access Routers
Information About Integrating Data and Voice Services for ISDN PRI Interfaces
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Integrating Data and Voice Services for ISDN PRI Interfaces on Multiservice Access Routers
Information About Integrating Data and Voice Services for ISDN
PRI Interfaces
PRI Interfaces
Before you configure integrated data and voice services on ISDN interfaces, you should understand the
following concepts:
following concepts:
•
•
•
Integrated Services for Multiple Call Types
ISDN interfaces can support both data calls and voice calls. Typically, this is done using one interface
for data and another for voice. This feature enables data (dial-in, dial-on-demand routing [DDR], and
DDR backup) and voice call traffic to occur simultaneously from the supported ISDN PRI interfaces. To
enable integrated services, the interface used for incoming voice calls is configured to accept multiple
voice call types.
for data and another for voice. This feature enables data (dial-in, dial-on-demand routing [DDR], and
DDR backup) and voice call traffic to occur simultaneously from the supported ISDN PRI interfaces. To
enable integrated services, the interface used for incoming voice calls is configured to accept multiple
voice call types.
shows an ISDN network configured for integrated data and voice services.
Figure 1
Integrated Voice with DDR Interface for WAN Failure Backup
Resource Allocation for Voice and Data Calls
Voice calls use DSP resources and data calls use HDLC resources for transmission. When an interface
is configured for integrated services, the gateway allocates the HDLC resources dynamically during call
setup and frees them back to the HDLC resource pools when the call terminates. This allows spare
HDLC resources to support ISDN PRI data calls and DSP resources to support voice calls.
is configured for integrated services, the gateway allocates the HDLC resources dynamically during call
setup and frees them back to the HDLC resource pools when the call terminates. This allows spare
HDLC resources to support ISDN PRI data calls and DSP resources to support voice calls.
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IP
PBX
PC Video
IP
Voice
Data
Data
PBX
IP
PC Video
IP
Voice
Data
Data
Single
PRI
Single
PRI
V
V
PSTN
Data network