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Data Sheet
Cisco VG248 Analog Phone Gateway
Figure 1
Cisco VG248 Analog Phone Gateway
Overview
The Cisco VG248 Analog Phone Gateway is a mixed-environment solution, enabled by Cisco AVVID (Architecture for Voice, Video and Integrated Data), which allows organizations to support their legacy analog devices while taking advantage of the new opportunities afforded through the use of IP telephony. The Cisco VG248 is a high-density gateway for using analog phones, fax machines, modems, voice mail systems, and speakerphones within an enterprise voice system based on Cisco CallManager. It is advantageous to have these devices tightly integrated with the rest of the IP-based phone system, for increased manageability, scalability, and cost-effectiveness (see Figure 2).
The Cisco VG248 offers 48 fully featured analog phone lines to be used as extensions to the Cisco CallManager system in a very compact 19-inch rack-mount chassis.
Key Features and Benefits
Analog phones—Full-feature analog phone connectivity is needed when the infrastructure (wiring) or application does not support or require IP phones. Full-featured analog phone lines allow organizations to deploy IP telephony without having to purchase IP phones for all the users.
Fax and modem—Fax machine and modem connectivity are required in many locations for business needs, and the Cisco VG248 is the ideal device to provide the lines for them. Fax machine and modem connectivity allows organizations to support these legacy devices alongside the New World IP telephones.
Voice mail—Many legacy voice mail systems require analog and Simple Messaging Desktop Interface (SMDI) connectivity. Voice mail support allows support for legacy voice mail systems with Cisco CallManager in more configurations and with higher reliability than was previously possible.
Investment protection—Customers can continue to use existing phones, fax machines, and voice mail systems while taking advantage of IP telephony.
Reduced barrier to entry—Providing a low-cost alternative for low-end analog phones, organizations can take advantage of IP telephony with a lower overall investment in this new technology.
Figure 2
Analog Device Integration with Cisco VG248
Analog Phone Connectivity
The Cisco VG248 is ideal for implementations in which it is necessary to use analog phones because it provides a high level of functionality at those locations, including:
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Caller ID—The Cisco VG248 supports caller ID (both name and number), so users can tell who is calling before answering the phone.
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Fax and Modem Connectivity
The Cisco VG248 supports legacy fax machines and modems. When using fax machines, the Cisco VG248 uses the Cisco fax-relay technology to transfer faxes across the network with high reliability using less bandwidth than a voice call. Any modems can be connected to the Cisco VG248.
Voice Mail Connectivity
The Cisco VG248 generates call information in an SMDI format for all calls ringing on any of the 48 analog lines connected to it. It will also pass on SMDI from other Cisco VG248s, or from a legacy PBX to the voice mail system. Any commands for message-waiting indicators will be sent to the Cisco CallManager and to any other attached SMDI hosts.
This mechanism allows for many new configurations when using SMDI-based voice mail systems, including:
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Figure 3
Integration of Legacy Voice Mail and Legacy PBX Using SMDI
Figure 4
Analog Voice Mail Scalability
Protocols Supported
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Technical Specifications
Ordering Information
Product Number: VG248
Product Description: Cisco VG248 Analog Phone Gateway
Regulatory Compliance
Product bears CE Marking indicating compliance with the 89/366/EEC and 73/23/EEC directives, including the following safety and EMC standards:
Physical Specifications
Network Management
Basic MIB II (RFC 1213)
Interface MIB (RFC 1573)
RMON (Ethernet statistics group)
Cisco Discovery Protocol Management Information Base
(CDP MIB)Cisco Process MIB
Cisco Memory Pool MIB
Cisco Voice Interface MIB
Cisco Analog Voice Interface MIB
Cisco EnvMon MIB
Customized Regional Support
United States
United Kingdom
France
Germany
Austria
Switzerland
Italy
Environmental
Operating environment:
0° to 40°C (32° to 104°F), 10% to 95% noncondensing
Nonoperating environment:
-10° to 60°C (14° to 140°F)
Service and Support
Cisco support solutions are designed for one purpose—to ensure customer success by delivering a suite of proactive support solutions. Cisco support solutions offer presales network audit planning, design consulting, network implementation, operational support, and network optimization. Taking advantage of Cisco expertise and experience, customers gain interactive knowledge-transfer solutions to enhance their success. By including support with Cisco equipment purchases, customers immediately gain access to a wealth of support and resources.
Contact your local sales office for further information or go to http://www.cisco.com.
