7From the Clock Master drop-down list, select the trunk clock source from the drop-down list. Choose either Recovered (the clock is recovered from the trunk -- default) or Generated (the trunks clock source is provided by the internal TDM bus clock source, according to the TDM Bus Clock Source parameter). For detailed information about the TDM Bus Clock Source parameter, see the V7122 Digital Gateway User Guide.

8From the Line Code drop-down list, select the line code. Choose either B8ZS (bipolar 8- zero substitution) for T1 trunks only; HDB3 (high-density bipolar 3) for E1 trunks only; or AMI (for both T1 and E1).

9From the ISDN Termination Side drop-down list (applicable only to ISDN protocols), select User Side when the PSTN or PBX side is configured as Network side, and vice-versa. If you do not know the V7122 gateway ISDN termination side, choose User Side and then open the Channel Status screen (by clicking the Home button). If the D- channel alarm is indicated, choose Network Side.

10To configure the different behavior bits: either enter the exact hexadecimal value of the bits in the field to the right of the relevant behavior parameter, or directly configure each bit field by completing the following steps:

a)Click the arrow button (-->) to the right of the relevant behavior parameter; the relevant behavior screen appears.

b)Modify each bit field according to your requirements.

c)Click Submit to save your changes.

11After modifying the parameters:

ƒ To apply the changes to the selected trunk only, click Apply Trunk Settings.

ƒ To apply the changes to all the trunks, click Apply to all Trunks.

The screen is refreshed and parameters become read-only (indicated by being grayed). The Stop Trunk button appears at the bottom of the screen.

12Access the TDM Bus Settings screen (click Advanced Configuration >TDM Bus Settings). From the PCM Law Select drop-down list, select Alaw for E1 trunks and MuLaw for T1 trunks.

13To save the changes so they are available after a power fail:

a)Click Maintenance on the main menu bar; the Maintenance Actions screen is displayed.

b)From the Burn to FLASH drop-down list, select Yes and the click the Reset button; a confirmation message appears when the save is complete.

For more detailed information about configuring the V7122 gateway trunk settings, see the V7122 Digital Gateway User Guide.

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3Com manual V7122 Digital Gateway Installation Guide
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V7122 specifications

The 3Com V7122 is a robust and versatile Layer 2/3 switch designed for small to medium-sized enterprises seeking a reliable networking solution. It plays a crucial role in improving network performance and enhancing connectivity for a growing number of devices in today’s digital landscape.

One of the standout features of the V7122 is its advanced switching capabilities. It supports 24 Ethernet ports, providing ample connectivity options for various end devices like computers, printers, and cameras. The switch offers a combination of copper and fiber interfaces, ensuring flexibility in deployment, whether for short-range or long-range connectivity.

The V7122 is equipped with a sophisticated traffic management system, which includes Quality of Service (QoS) features. This allows organizations to prioritize network traffic according to application requirements, ensuring bandwidth is allocated effectively. With this capability, time-sensitive applications such as voice-over-IP (VoIP) and video conferencing can function smoothly without interruption.

Another significant technology incorporated into the 3Com V7122 is its compatibility with VLAN (Virtual Local Area Network) configurations. This feature enables the segmentation of a network into multiple virtual networks, enhancing security and reducing congestion by limiting broadcast traffic. The ability to create subnets helps organizations to better manage their network resources and maintain optimal performance.

Moreover, the V7122 supports various network protocols, facilitating seamless integration within existing IT infrastructures. Its stackable design allows for easy scaling, enabling businesses to expand their network as needed without a complete overhaul. The switch also boasts an intuitive user interface, which simplifies management and configuration processes, making it accessible to network administrators of varying skill levels.

The 3Com V7122 stands out for its reliability and durability as well. It is built to handle the demands of an enterprise environment, featuring a compact and robust chassis designed for continuous operation. With the ability to support power over Ethernet (PoE), the switch can power connected devices directly through the Ethernet cable, eliminating the need for separate power supplies and reducing cable clutter.

In conclusion, the 3Com V7122 is a powerful networking solution that combines advanced switching features, traffic management capabilities, and flexible configurations. Its compatibility with various technologies and protocols makes it an ideal choice for organizations looking to optimize their network infrastructure for current and future demands.
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