Cisco Systems 3522 BRI, 3527 PRI manual Functionality

Page 9

Chapter 1 Functionality

 

 

 

 

About Gateway Features

 

 

 

Table 1-1

Gateway Feature Summary (continued)

 

 

 

 

 

 

 

 

Feature

 

Description

 

 

 

 

 

 

 

DTMF translation

The gateway supports translation between in-band Dual Tone

 

 

 

 

Multi-Frequency (DTMF) signals (on the ISDN side) and out-of-band

 

 

 

 

H.245 messages (on the IP side). DTMF translation occurs for voice and

 

 

 

 

video calls.

 

 

 

 

 

 

 

 

Dual video

 

The gateway supports H.239 standards-based dual video and TANDBERG

 

 

 

 

DuoVideo technology. Dual video streams enable a screen to carry video

 

 

 

 

images from one source while simultaneously displaying images from a

 

 

 

 

second source.

 

 

 

 

 

 

 

Conceal caller ID

The gateway supports a conceal caller ID feature that instructs the

 

 

 

 

gatekeeper to conceal the identity of the calling endpoint on the IP or

 

 

 

 

ISDN network, whether the presentation restricted feature is enabled or

 

 

 

 

not.

 

 

 

 

 

 

 

 

H.323 fast start

 

The gateway H.323 fast start feature enables endpoints to join a voice

 

 

 

 

conference in the gateway more quickly.

 

 

 

 

 

 

 

 

ISDN rollover

 

The gateway features ISDN rollover. In this feature, the gateway sends a

 

 

(available in

 

“busy out” channel request to the PSTN switch when the current PRI

 

 

Cisco Unified

 

connection is left with less than a predefined number of available B

 

 

Videoconferencing 35

channels. The PSTN switch “rolls over” to the next available gateway.

 

 

27 PRI Gateway only)

 

 

 

 

 

 

 

 

 

 

 

 

 

Network Specific

The gateway provides support for Network Specific Facility Information

 

 

Facility (available in

Elements (NSF IEs) which enable system administrators to specify to

 

 

Cisco Unified

 

service providers the equipment, service, or network through which they

 

 

Videoconferencing 35

want a call routed.

 

 

27 PRI Gateway only)

 

 

 

 

 

 

 

 

 

 

 

 

 

ISDN connection

The gateway responds to ISDN connection failure events, by unregistering

 

 

failure

 

from its gatekeeper. The gatekeeper is forced to send new IP-to-ISDN

 

 

 

 

calls through a different gateway, thus ensuring high call completion rates.

 

 

 

 

The gateway re-registers to the gatekeeper when the ISDN connection is

 

 

 

 

restored.

 

 

 

 

 

 

 

 

Downspeeding

 

The gateway features downspeeding functionality. In the downspeeding

 

 

 

 

feature, the gateway attempts to reconnect a disconnected video call either

 

 

 

 

at a lower bandwidth or as a voice call. Downspeeding contributes to a

 

 

 

 

higher percentage of call completion on the network. The gateway

 

 

 

 

supports downspeeding at call setup and in mid-call.

 

 

 

 

 

 

 

Multiple trap server

The gateway supports up to three SNMP trap servers.

 

 

support

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H.239 support

 

The gateway supports the H.239 protocol in ISDN-to-IP calls and in

 

 

 

 

IP-to-ISDN calls.

 

 

 

 

 

 

 

Encryption support

The gateway supports H.235-compliant AES 128 encryption for calls over

 

 

 

 

IP networks, and H.233 and H.234-compliant AES 128 encryption for

 

 

 

 

calls over ISDN networks.

 

 

 

 

 

 

 

H.243 Conference

The gateway supports the H.243 protocol in ISDN-to-IP calls and in

 

 

Control support

 

IP-to-ISDN calls. The gateway identifies the protocol version that an IP

 

 

 

 

endpoint uses and sends H.239 capabilities only to those endpoints

 

 

 

 

working with protocol version 4.0 or later.

 

 

 

 

 

 

 

 

 

Installation and Upgrade Guide for Cisco Unified Videoconferencing 3522 BRI Gateway and 3527 PRI Gateway Release 5.5

 

 

 

 

 

 

OL-14910-01

 

 

 

1-3

 

 

 

 

 

 

 

Image 9
Contents Customer Order Number Text Part Number OL-14910-01 Americas HeadquartersPage N T E N T S Safety EMC OL-14910-01 Functionality About the Cisco Unified Videoconferencing 3527 PRI GatewayAbout the Cisco Unified Videoconferencing 3522 BRI Gateway About Gateway Features Feature DescriptionTCS4 Functionality VGA, XGA, SVGA, SIF, 4SIF, CIF, QCIF, 4CIF, 16CIF Feature Cisco UnifiedFeature Cisco Unified About Multimedia Conferencing Multimedia Conferencing through the Gateway About Point-to-Point ConferencingAbout Multipoint Conferencing About Gateway IP Network ConnectionsAbout Gateway Isdn Network Connections PRI Gateways BRI Gateways About BRI Gateway Call handling Capacity About PRI Gateway Call Handling CapacityAbout Gateway Call Bandwidth Overhead CapacityAbout Peer-to-Peer Connectivity Resource Allocation across E1/T1 LinesFront Panel Physical DescriptionCisco Unified Videoconferencing 3527 PRI Gateway Rear Panel Alarm LEDComponent Description CD LEDCisco Unified Videoconferencing 3522 BRI Gateway RTM Alarm LEDCall Appearances EktsVerifying the Package Contents Fitting a Bracket for Rack Mounting Setting the IP Address Connecting to a PCBefore You Begin RequirementsTo change the configuration software password Changing the Configuration Tool Login Password Local Port Monitoring Connections Snmp ManagementSvga Port Performing Software UpgradesNetscape Navigator Users Registering the Online HelpUsing the Cisco Software Upgrade Utility Launching the Cisco Software Upgrade UtilityIntroduction Upgrading Software Click Customize Snmp SettingsCable Connections and Pin-outs Unit RS-232 9-Pin Serial PortPin Function Isdn Port RJ-45 8-Pin IP Network PortTechnical Specifications Table Technical SpecificationsLED Indicators Push ButtonsChipset Power SupplyOperating System MemoryPage OL-14910-01 Safety Electrical SafetyGrounding High Voltage ESD ProceduresElektrische Sicherheit SicherheitESD-Verfahren WarnhinweiseSeguridad Electrica SeguridadPuesta a Tierra Alta TensiónProcedimientos ESD Securite Securite ElectriqueMise a la Terre Haute Tension Prevention des Decharges ElectrostatiquesChapter Compliance and Certifications Safety ComplianceFCC Part 15 Notice TelecomCISPR24 CE CTR3, CE CTR4Industry Canada Acta Part 68 NoticeEnvironmental Compliance EMC BRIIsdn EMCSvga PRISnmp IN-4
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3527 PRI, 3522 BRI specifications

Cisco Systems has long been a leader in networking and telecommunications equipment, and its BRI (Basic Rate Interface) and PRI (Primary Rate Interface) products are essential components in enabling businesses to manage voice and data communications efficiently. Notable models such as the Cisco 3522 BRI and 3527 PRI have earned recognition for their robust performance and versatile features.

The Cisco 3522 BRI is designed to deliver high-quality voice and data services over ISDN (Integrated Services Digital Network) connections. With two B channels for voice or data transmission, each supporting up to 64 Kbps, this device is ideal for small to medium-sized businesses that require reliable communication solutions while maintaining cost-effectiveness. The Cisco 3522 BRI supports multiple protocols, making it a flexible choice to adapt to various network environments.

On the other hand, the Cisco 3527 PRI supports up to 30 B channels, thereby significantly increasing the capacity for voice calls and data transfer. This scalability makes the 3527 PRI suitable for larger organizations that demand higher throughput and call handling capability. It operates over T1 and E1 lines, allowing businesses to leverage existing infrastructure while improving operational efficiencies. Additionally, the 3527's advanced features, such as call processing and load balancing, contribute to a seamless communication experience.

Both devices support a range of technologies that enhance functionality and performance. They are equipped with Call Admission Control (CAC) to optimize bandwidth use and reduce congestion during peak traffic. Cisco's VoIP technology, including features such as voice provisioning, fax over IP, and QoS (Quality of Service) mechanisms, ensures voice clarity and reliability.

Security is paramount, and both the 3522 and 3527 incorporate various protocols such as SRTP (Secure Real-Time Transport Protocol) to protect voice communications against unauthorized access. Furthermore, integration with Cisco's unified communications offerings allows for a more cohesive communication strategy, ensuring that users can take advantage of collaboration tools and data services.

In conclusion, the Cisco 3522 BRI and 3527 PRI models stand out with their impressive feature sets and technologies, making them an excellent investment for businesses needing reliable, scalable, and secure voice and data communication solutions. Choosing Cisco means embracing a future-proof solution that can grow with your organization's communication needs.