Cisco VG450 Analog Voice Gateway Data Sheet

The Cisco^® VG450 High-Density Analog Voice Gateway enables an IP telephony solution to continue using traditional analog devices while taking advantage of the productivity afforded by IP infrastructure (Figure 1).

The Cisco Unified Communications portfolio 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 improve revenue sales and profitability. The Cisco Unified Communications portfolio is a critical part of the Cisco Business Communications Solution - an integrated solution for organizations of all sizes that 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.

The Cisco VG450 High-Density Analog Gateway is a Cisco IOS-XE^® Software-based analog phone gateway. It connects analog phones, fax machines, modems, and speakerphones to an enterprise voice system based on Cisco Unified Communications Manager (UCM). The tight integration with the IP-based phone system is advantageous for increased manageability, scalability, and cost-effectiveness. Businesses can also use the Cisco VG450 with Cisco Unified Communications Manager Express to effectively augment an Integrated Services Router (ISR) environment. Either topology environment will support business needs for high concentration of analog voice ports for modem calls, fax calls, and analog supplementary services (Figure 2).

The Cisco VG450 offers Cisco IOS-XE Software manageability on analog phone lines to enable them to be used as extensions to the Cisco Unified Communications Manager or Cisco Unified Communications Manager Express system. The Cisco VG450 is offered in a 19-inch rack-mount chassis form.

Features and benefits

●   Cisco IOS-XE Software-based hardware: The hardware includes uniform Cisco Command-Line Interface (CLI) and Simple Network Management Protocol Version 3 (SNMPv3) support for ease of gateway configuration and operation.

●   Robust voice quality: Cisco experience in providing toll-quality packet-voice service helps ensure that the Cisco VG450 provides the clear, robust voice quality end users have come to expect from telephony services.

●   Investment protection: Customers can continue to use existing analog phones, fax machines, and modems while taking advantage of IP telephony. Basic analog phone connectivity is needed when the infrastructure (wiring) or application does not support or require IP phones. The Cisco VG450 is the ideal platform to support centralized and highly concentrated analog phone line deployments, allowing organizations to deploy IP telephony without having to purchase IP phones for all users and to continue using existing devices. The Cisco VG450 can also be used in a Cisco Unified Communications Manager Express environment and migrated to Cisco Unified Communications Manager deployment with 100-percent investment protection.

●   High availability: The Cisco VG450 has four Gigabit Ethernet ports to enable link redundancy configurations toward the LAN. Customers will experience less voice downtime due to WAN link failure.

●   Cisco VG450 powered by high-performance multicore processors: In this platform, power redundancy will be available by installing an optional integrated Cisco Redundant Power System (RPS), thereby decreasing network downtime and protecting the network from power-supply failures. DC PSU will be available by 1H2019.

●   Reduced barrier to entry: The Cisco VG450 provides a low-cost alternative for low-end analog phones and allows organizations to take advantage of IP telephony with a lower overall IP telephony investment.

Analog phone connectivity

The Cisco VG450 is ideal for analog phone deployments ranging from centralized to sparsely concentrated or distributed topologies. It provides a high level of availability at locations with Media Gateway Control Protocol (MGCP) Fallback, with ease of manageability using Cisco IOS-XE Software monitoring features. It 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 Analog voice gateways

The Cisco VG450 supports Feature Access Codes (FAC) in conjunction with Cisco Unified Communications Manager and Cisco Unified Communications Manager Express. Refer to Cisco Unified Communications Manager and Cisco Unified Communications Manager Express documentation for details.

Fax and modem connectivity

The Cisco VG450 supports fax machines and modems. When using fax machines, VG450 supports T.38 fax relay and fax pass-through. 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 VG450 and will be transferred over the network using modem pass-through.

Protocols supported

●   SCCP

●   H.323v4

●   MGCP

●   SIP

●   Real-Time Transport Protocol (RTP)

●   Secure Real-Time Transport Protocol (SRTP)

●   Trivial File Transfer Protocol (TFTP)

●   HTTP server

●   SNMP

●   Telnet

●   Dynamic Host Configuration Protocol (DHCP)

●   Domain Name System (DNS)

●   Call survivability - MGCP failover to an H.323 connection to the SRST router

●   T.38 Fax Relay, and modem pass-through

●   Support G.711, and G.729a

●   RADIUS and TACACS+ for Telnet and authorization

Support for high density analog voice modules on VG450

VG450 leverage new generation of high density analog voice modules to provide modular solution with flexibility to configure FXS and FXO port density.

Cisco High-Density Analog Voice and Fax Service Modules are available in either a single-wide or double-wide form factor, as depicted in Table 1.

Table 2.       Form factors

The new generation of Cisco High-Density Analog Voice and Fax Service Modules improves upon the previous high-density analog and digital extension modules (EVMs). These improvements are highlighted below:

●   On-board Digital Signal Processor (DSP): The FXO and FXS service modules contain an onboard DSP and don’t require the router to have a dedicated Packet Voice DSP Module (PVDM) on the motherboard. The DSP on the voice module is necessary for the voice features. It also provides for echo cancellation of up to 128-ms echo-tail length for demanding network conditions.

●   FXS-E (extended loops) support: FXS ports on the new modules support FXS-E with the following details:

◦     Higher loop current (35 mA) to accommodate specialty phones

◦     Longer loop length for loops with 26 AWG wire, up to 11,000 feet (3400 meters)

◦     Higher ringing voltage (65 Vrms, no load)

◦     The SM-X-72FXS module supports two FXS-E modes:

●   Mode 1 (default): First 16 ports are FXS-E enabled, with the remaining 56 ports as regular FXS.

●   Mode 2: First 56 ports are FXS-E enabled, with the remaining 16 ports disabled.

Note:    Switching between the modes requires reload of the ISR chassis.

Table 2 summarizes the supported FXO failover bypass feature in each service module.

●   FXO failover bypass ports: A failover bypass port, also called a failover trunk bypass, provides a way to use designated analog phone ports to make phone calls through the PSTN during a power outage.

Table 3.       Feature and port comparison

Analog and digital voice NIM (Network Interface Module) support on VG450

VG450 allows to mix and match the high density analog voice modules (Single wide and double wide module slots) along with FXS/FXO Network Interface Modules (NIM) on the chassis to obtain optimal density for FXS and FXO ports in a single chassis.

Following are valid hardware combination options for high density analog voice modules in service module slot for VG450 bundles.

VG450-144FXS/K9

●   Two SM-X-72FXS modules on VG450 for 144FXS Ports (top and bottom DW slots).

VG450-72FXS/K

●   One SM-X-72FXS module (bottom DW slot) with at least one single-wide high density analog voice module in top slot (mandatory). Max two single-wide high density analog voice service module in top slot.

●   Only double wide high density module (SM-X-72FXS) supported in bottom slot.

VG450/K9

●   Chassis only without any modules or NIMs.

Following Analog Voice NIM modules are supported in the NIM slot for VG450

Table 4.       Analog Voice NIM module support on VG450

Additionally, VG450 support T1E1 Voice Network Interface Modules in NIM slots for VG450.

The T1/E1 modules contain an onboard Cisco Packet Voice Digital Signal Processor Module 4 (PVDM4) slot, which requires a fourth-generation PVDM4 module. A PVDM4 on the T1/E1 module is necessary for the voice features.

The PVDM4 also provides for echo cancellation of up to 128-ms echo-tail length for demanding network conditions.

Table 5.       Digital Voice NIM module support on VG450

●   SM-X-NIM-ADPTR is not supported on SM slots for VG450

●   There are no PVDM slots on VG450 motherboard.

Software compatibility

VG450 does not natively support CUBE (Cisco unified border element), CUCME (Cisco unified call manager express) or SRST (Survivable remote site telephony). Additionally VG450 does not support DSP farm capability. These functions are only available in ISR4000.

Table 6.       Software compatibility

High density analog voice service module technical specifications

Table 7.       Technical specifications for the FXS and FXO service modules for VG450

Table 8.       Regulatory standards compliance: Safety and EMC

VG450 technical specifications

Table 9 gives the Cisco VG450 technical specifications.

Table 9.       Cisco VG450 technical Specifications

Homologation

High-Density Analog Voice and Fax Service Modules in VG450 are approved for the countries listed in Table 8 for off-premises (FXO) and on-premises (FXS) connections. Approval for other countries is in progress. Refer to the Cisco Telecom Approvals Website for approval progress for other countries: https://tools.cisco.com/cse/prdapp/jsp/externalsearch.do?action=externalsearch&page=EXTERNAL_SEARCH.

Table 10.     Telecom approvals

The CE mark is recognized in the following countries: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Gibraltar, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxemburg, Malta, Monaco, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland, and United Kingdom.

Ordering information

To order this product, use the information provided in Table 11.

Table 11.     Ordering information

Services and support

Using the Cisco Lifecycle Services approach, Cisco and our partners offer a broad portfolio of end-to-end services. These services are based on proven methodologies for deploying, operating, and optimizing IP Communications solutions. Initial planning and design services, for example, can help you meet aggressive deployment schedules and minimize network disruption during implementation. Operate services reduce the risk of communications downtime with expert technical support. Optimize services enhance solution performance for operational excellence. Cisco and our partners offer a system-level service and support approach that can help you create and maintain a resilient, converged network that meets your business needs.

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