OVLDLEVEL1PERCENT, OVLDLEVEL3PERCENT, Calls

Chapter 3 Provisioning the Cisco HSI

Cisco HSI Configuration

Table 3-4 Dynamic System Data Parameters (continued)

Parameter	Description	Default

OVLDLEVEL1PERCENT	Indicates what percentage of calls should be rejected when an	20
	overload condition occurs. This parameter is used in conjunction with
	the OVLDLEVEL1FILTER parameter. The overload level 1 value is
	the lowest level of overload and must be less than or equal to the
	provisioned values for OVLDLEVEL2PERCENT and
	OVLDLEVEL3PERCENT.
	Note If this value is set to zero, no overload level 1 treatment
	occurs.

OVLDLEVEL1FILTER	Indicates what call types should be gapped if an overload level 1	Normal
	condition occurs. The possible values are:
	• Normal—Emergency or priority calls are not gapped.
	• All—All calls are gapped, regardless of type.
	Note If the overload percentage is set to 100, all calls are gapped
	irrespective of this setting.

OVLDLEVEL1THRESHLOWER	Determines the number of active calls below which the application	1800
CALLS	load must fall in order to remove the overload level 1 condition.

OVLDLEVEL1THRESHUPPER	Determines how many simultaneous active calls trigger an overload	1900
CALLS	level 1 condition.

OVLDLEVEL1THRESHLOWER	Determines the CPU utilization level below which the application	60
CPU	must fall in order to remove the overload level 1 condition.

OVLDLEVEL1THRESHUPPER	Determines the level of CPU utilization that triggers an overload	65
CPU	level 1 condition.

OVLDLEVEL2PERCENT	Indicates what percentage of calls should be rejected when an	75
	overload condition occurs. The parameter is used in conjunction with
	the OVLDLEVEL2FILTER parameter. This is the second level of
	overload and must be less than or equal to the provisioned value of
	OVLDLEVEL3PERCENT and greater than or equal to the
	provisioned value of OVLDLEVEL1PERCENT.
	Note If this value is set to zero, no overload level 1 or 2 treatment
	occurs (by definition, the level 1 value must also be zero).

OVLDLEVEL2FILTER	Indicates what call types should be gapped if an overload level 2	Normal
	condition occurs (see OVLDLEVEL1FILTER).

OVLDLEVEL2THRESHLOWER	Determines the number of active calls below which the application	2000
CALLS	load must fall in order for the overload level 2 condition to be
	removed.

OVLDLEVEL2THRESHUPPER	Determines how many simultaneous active calls trigger an overload	2200
CALLS	level 2 condition.

OVLDLEVEL2THRESHLOWER	Determines the level of CPU utilization below which the application	70
CPU	must fall in order for the overload level 2 condition to be removed.

OVLDLEVEL2THRESHUPPER	Determines the level of CPU utilization that triggers an overload	80
CPU	level 2 condition.

	Cisco H.323 Signaling Interface User Guide
	Cisco H.323 Signaling Interface User Guide
OL-4806-01 Rev. A14		3-9
OL-4806-01 Rev. A14		3-9

H.323 specifications

Cisco Systems H.323 is a set of standards designed for transmitting audio, video, and data over packet-switched networks. It is a critical technology that enables real-time communication and has become integral to the world of VoIP (Voice over Internet Protocol) and video conferencing applications. Originally developed by the ITU-T, H.323 has been widely adopted and implemented by Cisco Systems, allowing organizations to leverage reliable and scalable communication solutions.

One of the standout features of H.323 is its ability to support interoperability among varying equipment and platforms. This means that devices from different manufacturers can communicate seamlessly, which is vital in a diverse technical environment. H.323 does this by defining protocols that handle signaling, media transport, and control, ensuring that various systems can work together effectively.

Key technologies utilized within H.323 include H.225 and H.245 signaling protocols. H.225 is responsible for call setup and management, establishing communication between endpoints. In contrast, H.245 manages the negotiation of media channels, allowing devices to configure themselves based on the capabilities of each other. This adaptability is crucial for dynamic network conditions typical in VoIP applications.

Another defining characteristic of H.323 is its support for multiple types of multimedia communication, including point-to-point and multipoint calls. This flexibility supports everything from simple audio calls to complex videoconferencing setups, where many participants can share video and audio streams concurrently. Cisco enhances this capability through its hardware and software offerings, optimizing performance for conference calls.

H.323 also features robust error resilience mechanisms. This ensures that real-time data, which is typically sensitive to delays and losses, can be transmitted with minimal disruption. Moreover, it facilitates quality of service (QoS) implementation, allowing organizations to prioritize voice and video traffic over less critical data services, thereby improving the overall user experience.

In conclusion, Cisco Systems H.323 stands out as a comprehensive solution for real-time communication over packet-based networks. Its main features, including interoperability, multimedia support, and enhanced error resilience, position it as a relevant technology in both corporate and personal communication settings. As organizations continue to adopt cloud and hybrid communication models, H.323 remains a reliable backbone for ensuring connectivity and collaboration across diverse platforms.

Cisco Systems H.323 OVLDLEVEL1PERCENT, OVLDLEVEL3PERCENT, OVLDLEVEL1FILTER, OVLDLEVEL1THRESHLOWER

Models: H.323

Parameter

Description

OVLDLEVEL1PERCENT

OVLDLEVEL3PERCENT.

OVLDLEVEL1FILTER

OVLDLEVEL1THRESHLOWER

CALLS

OVLDLEVEL1THRESHUPPER

CPU

OVLDLEVEL2PERCENT

OVLDLEVEL2FILTER

OVLDLEVEL2THRESHLOWER

OVLDLEVEL2THRESHUPPER

H.323 specifications