The Cisco® VG 224 Analog Phone Gateway enables an IP telephony solution to continue using traditional analog devices while taking advantage of the productivity afforded by IP infrastructure.
The Cisco Unified Communications system of voice and IP communications products and applications enables organizations to communicate more effectively-helping them to streamline business processes, reach the right resource the first time, and impact the top and bottom line. The Cisco Unified Communications portfolio is a key part of the Cisco Business Communications Solution-an integrated solution for organizations of all sizes which also includes network infrastructure, security, and network management products, wireless connectivity, and a lifecycle services approach, along with flexible deployment and outsourced management options, end-user and partner financing packages, and third-party communications applications.
Figure 1. Cisco VG 224 Analog Phone Gateway
The Cisco VG 224 (Figure 1) is a Cisco IOS® Software-based high-density 24-port gateway for analog phones, fax machines, modems, and speakerphones within an enterprise voice system based on Cisco Unified CallManager. Having these devices tightly integrated with the IP-based phone system is advantageous for increased manageability, scalability, and cost-effectiveness (Figure 2). Commercial businesses can also use the Cisco VG 224 with Cisco Unified CallManager Express to effectively augment an integrated services router (ISR) environment. Either topology environment will support business needs for a high concentration of analog voice ports for modem calls, fax calls, and analog supplementary services (Figure 3).
The Cisco VG 224 offers Cisco IOS Software manageability with 24 analog phone lines to be used as extensions to the Cisco Unified CallManager or Cisco Unified CallManager Express system in a very compact 19-inch rack-mount chassis.
Figure 2. Cisco VG 224 Integration with Cisco Unified CallManager
Figure 3. Cisco VG 224 Integration with Cisco Unified CallManager Express
The Cisco VG 224 is ideal for implementations in which analog phones are needed. The VG 224 provides a high level of availability at locations with MGCP Fallback, with ease of manageability using Cisco IOS Software monitoring features. Cisco VG 224 offers many supplementary analog calling features depending on the call control and signaling type used. Refer to Table 1 for the supplementary analog calling features available.
Table 1. Analog Supplementary Features available on Cisco VG224
|H.323 Features With Cisco Unified CallManager Express||MGCP Features With Cisco Unified CallManager Express||SCCP Features With Cisco Unified CallManager||SCCP Features With Cisco Unified CallManager Express||SIP Features With Cisco Unified CallManager Express|
|Call Forward All||X||X|
|Call Forward Busy||X||X|
|Call Forward Cancel||X||X|
|Call Forward No Answer||X||X|
|Call Pickup Group||X||X|
|Call Pickup Local||X||X|
|Call Transfer Blind||X||X||X||X|
|Call Transfer Consultative||X||X||X|
|Conference Call||Up to 3 parties||Up to 3 parties|
|Directed Call Park||X|
|Directed Call Pickup||X|
|Directed Call Pickup of Ringing Extension||X|
The Cisco VG 224 supports fax machines and modems. When using fax machines, the Cisco VG 224 supports Cisco fax relay, T.38 fax relay, and fax passthrough. Cisco or T.38 fax relay technologies allow transfer of faxes across the network with high reliability using less bandwidth than a voice call. All modems can be connected to the Cisco VG 224 and will be transferred over the network using modem passthrough.
Table 2. Voice Port
|Tip/Ring Interfaces for Each FXS Port (SLIC)|
|Ring Voltage||50V if no DC offset|
|Ring Frequency||20, 25, 30, 50 Hz|
|Ring Waveform||Sine wave if no DC offset20V and 24V DC offset will be trapezoidal|
|Ring Load||1400 ohm + 40µF(Up to three ports at one time)|
|Loop Resistance||Up to 600 ohm (including the phone or terminal equipment)|
|Off-Hook Current||25 mA (maximum)|
|RJ-11 FXS Port Terminating Impedance Option||600 ohm complex, 600 ohm real, 900 ohm complex, 900 ohm real, complex1, and complex2|
This equipment complies with all the regulatory requirements for connection to the communications networks of each country in which it is sold.
To order this product, use the following information:
Product Number: VG 224
Product Description: Cisco VG 224 Analog Phone Gateway