Chapter 1 Functionality

About Cisco Unified Videoconferencing 3500 Gateway Functionality

About Cisco Unified Videoconferencing 3500 Gateway Functionality

About PRI Gateway Call Handling Capacity, page 1-11

About BRI Gateway Call handling Capacity, page 1-11

About Gateway Call Bandwidth Overhead, page 1-12

About Peer-to-Peer Connectivity, page 1-12

About PRI Gateway Call Handling Capacity

Table 1-3lists the maximum call handling capacity of the PRI gateway for different types of calls.

Table 1-3

PRI Gateway Call Handling Capacity

 

 

 

 

Call Type

 

Maximum Number of

Maximum Number of

 

 

Calls Using 1 x E1 PRI

Calls Using 1 X T1 PRI

 

 

Line

Line

 

 

 

voice (64 Kbps)

30

23

 

 

 

2B video (128 Kbps)

15

11

 

 

 

6B video (384 Kbps)

5

3

 

 

 

12B video (768 Kbps)

2

1

 

 

 

 

Note Enabling ISDN-to-IP DTMF detection in the PRI gateway for video calls reduces the number of supported calls by half.

About BRI Gateway Call handling Capacity

Table 1-4lists the maximum call handling capacity of the BRI gateway for four BRI lines, eight voice-only calls, or eight video calls, or any combination of the two.

Table 1-4

BRI Gateway Call Handling Capacity

 

 

 

Number of Calls

 

Capacity

 

 

 

 

1

 

384

Kbps+ or 412 Kbps

 

 

 

 

2

 

256

Kbps

 

 

 

 

4

 

128

Kbps

 

 

 

8

 

64 Kbps

 

 

 

 

 

 

Installation and Upgrade Guide for Cisco Unified Videoconferencing 3522 BRI Gateway and 3527 PRI Gateway Release 5.6

 

 

 

 

 

 

OL-17010-01

 

 

1-11

 

 

 

 

 

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Cisco Systems 3522 BRI manual About PRI Gateway Call Handling Capacity, About BRI Gateway Call handling Capacity

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.