Cisco IP Telephony Troubleshooting Guide for Cisco CallManager Release 3.0(1)

Glossary

DNIS

DNS

DRQ

DTMF

Flow

Full duplex

G.711

G.729

H.225

H.245

H.323

Half Duplex

Hookflash

ICCP

ISDN

Jitter

µ-law (“mu-law”)

MGCP

MTP

Partition

PBX

machine, or analog phone attached to a gateway. Examples include 1000, 24231, and so on.

Dialed Number Identification Service.

Domain Name System. System used in the Internet for translating names of network nodes into addresses.

Disengage Request.

Dual tone multifrequency. Use of two simultaneous voice-band tones for dialing (such as touch tone).

Stream of data traveling between two endpoints across a network (for example, from one LAN station to another). Multiple flows can be transmitted on a single circuit.

Capability for simultaneous data transmission from both a sending station and a receiving station.

Describes the 64-kbps PCM voice coding technique. In G.711, encoded voice is already in the correct format for digital voice delivery in the PSTN or through PBXs. Described in the ITU-T standard in its G-series recommendations.

Describes CELP compression where voice is coded into 8-kbps streams. There are two variations of this standard (G.729 and G.729 Annex A) that differ mainly in computational complexity; both provide speech quality similar to 32-kbps ADPCM. Described in the ITU-T standard in its G-series recommendations.

An ITU standard that governs H.225 session establishment and packetization. H.225 actually describes several different protocols: RAS, use of Q.931, and use of RTP.

An ITU standard that governs H.245 endpoint control.

Extension of ITU-T standard H.320 that enables videoconferencing over LANs and other packet-switched networks, as well as video over the Internet.

Capability for data transmission in only one direction at a time between a sending station and a receiving station. BSC is an example of a half- duplex protocol.

Short on-hook period usually generated by a telephone-like device during a call to indicate that the telephone is attempting to perform a dial-tone recall from a PBX. Hookflash is often used to perform call transfer.

Intra-Cluster Control Protocol

Integrated Services Digital Network. Communication protocol, offered by telephone companies, that permits telephone networks to carry data, voice, and other source traffic.

The variation in the arrival times of voice packets.

Companding technique commonly used in North America. µ-law is standardized as a 64-kbps codec in ITU-T G.711.

Media Gateway Control Protocol. A protocol for Cisco CallManager to control VoIP gateways (MGCP endpoints).

Media Termination Point.

A Partition is a logical grouping of Directory Numbers and Route Patterns with similar reachability characteristics. For simplicity, these are usually named for their characteristic, such as "NYLongDistance", "NY911", etc. When a DN or Route Pattern is placed into a certain partition, this creates a rule for who can call that device or Route List.

Private Branch Exchange. Digital or analog telephone switchboard located on the subscriber premises and used to connect private and public telephone networks.

© 2000 Cisco Systems, Inc.

7

Page 6 Page 8
Page 7
Image 7
Cisco Systems 30 VIP manual Flow Full duplex 711 729 225 245 323 Half Duplex Hookflash, Jitter Law mu-law, Partition
Page 6 Page 8

30 VIP specifications

Cisco Systems has been a leading company in networking technology, and its suite of products is continually evolving to meet the demands of modern digital infrastructure. One of the latest introductions is the Cisco Systems 30 VIP, a highly advanced solution designed to enhance network performance and security for businesses of all sizes.

The Cisco Systems 30 VIP stands as a cornerstone for next-generation networking features, providing organizations with significant advantages in speed, reliability, and scalability. At the heart of the 30 VIP are key technologies such as advanced routing protocols and enhanced security measures that ensure seamless data transfer across multiple devices.

Main features of the Cisco Systems 30 VIP include its high throughput capabilities, which support accelerated data processing and lower latency. This is crucial for businesses that rely on real-time data exchange and cloud applications. Additionally, the device incorporates Multi-Protocol Label Switching (MPLS) technology, which optimizes data flow between networks and significantly enhances overall performance.

Another notable characteristic of the 30 VIP is its integrated security features, including advanced threat detection and prevention systems. These are designed to protect sensitive business data from cyber threats, ensuring operational continuity and compliance with industry regulations. The Cisco 30 VIP also supports secure access protocols, allowing for secure remote connections, which is increasingly vital in today’s hybrid work environment.

The adaptability of the Cisco Systems 30 VIP is another of its standout aspects. It offers compatibility with existing Cisco infrastructure, making it easier for businesses to adopt new technologies without overhauling their entire system. This modular approach allows for easy upgrades and integration of future technologies, ensuring long-term viability and investment protection.

Furthermore, the Cisco Systems 30 VIP is powered by intelligent network management software that simplifies monitoring, configuration, and troubleshooting processes. This software enhances network visibility, allowing administrators to identify and address potential issues proactively, thereby reducing downtime and enhancing user experience.

In summary, the Cisco Systems 30 VIP represents a significant advancement in network technology with its high throughput, integrated security features, adaptability, and intelligent management capabilities. These elements combine to provide a robust solution that meets the evolving needs of modern businesses while ensuring secure and efficient operations. As organizations continue to navigate an increasingly complex digital landscape, the Cisco Systems 30 VIP offers a future-proof option designed to facilitate growth and resilience.
Top Page Image Contents