Feature Overview
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Cisco IOS Release 12.0(7)T
Figure 2 VoIP Used as a PSTN Gateway to Off load Voice Traffic and Fax Traffic
Universally Accessible Voice-Mail and Fax-Mail Services
VoIP on the Cisco AS5800 can be used to leverage the technology prefixes feature. Gateways (with
voice/fax feature cards) that are connected to the voice-mail and fax-mail servers can be identified
by gatekeepers based on a prefix prepended to an E.164 telephone number.
Additional Benefits
VoIP on the Cisco AS5800 can be used to provide the following additional benefits:
• Remote PBX presence over WANs
• POTS-Internet telephony gateways
Restrictions
To run Voice over IP on the Cisco AS5800, the AS5800 must have a version of the Cisco IOS
software installed that supports DSDWare 3.1.7 (for example, Cisco IOS Release 12.0(4)XL or
Cisco IOS Release 12.0(7)T).
Related Features and Technologies
• Cisco IOS Release 12.0(3)T Voice over IP for the Cisco AS5300 feature module
• Cisco IOS Release 12.0(3)T Service Provider Features for Voice over IP feature module
• Cisco IOS Release 12.0(5)T IP RTP Priority feature module
• Cisco IOS Release 12.0(7)T Configuring Interactive Voice Response for Cisco Access Platforms
feature module
Related Documents
• Voice, Video, and Home Applications Configuration Guide, Cisco IOS Release 12.0
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