ISDN Trunk Settings Help

The Integrated Services Digital Network (ISDN) consists of digital telephony and data-transport services offered by regional telephone carriers. ISDN involves the digitization of the telephone network, which allows voice, data, text, graphics, music, video, and other source material to be transmitted over existing telephone wires. The ISDN Basic Rate Interface (BRI) service offers two B channels (voice transfer) and one D channel (signaling data transfer). The BRI B-channel service operates at 64 kbps and is meant to carry user data. The BRI D-channel service operates at 16 kbps and is meant to carry control and signaling information, although it may also support user data transmission under certain circumstances.

The ISDN service allows Quadro act as a user or as a network. If connected to a private PBX, the Quadro should be configured in the network mode. If an ISDN trunk from the CO (Central Office) is connected to the Quadro, it should be configured as a user. Quadro supports the MSN (Multiple Subscriber Number) service, i.e. it can be subscribed to multiple numbers from the CO, so 2 simultaneous calls can take place at a time.

The number of available ISDN trunks is dependent on the type of your Quadro. QuadroM32x, QuadroM8L and QuadroM26x have no local ISDN trunks available. Only ISDN trunks shared on other devices may be listed on this page.

The ISDN Trunk Settings page is used to configure the ISDN trunk and its signaling. The page consists of the Trunk Settings table that lists the available ISDN trunks of Quadro and their settings (Trunk name and interface types).

Clicking on the corresponding ISDN trunk will lead you to the ISDN Wizard where trunk's ISDN signaling settings can be configured.

• The Start and Stop functional links are used to start/shutdown the selected ISDN trunk(s). When ISDN trunk is in shutdown state, ISDN calls cannot be placed or received.
• The Restart functional link is used to bring channel(s) to the initial idle state on the both sides. When applying one of these options, any active traffic on the channel(s) will be terminated.).
• The Copy to Trunk(s) functional link displays a page used to choose a trunk to which selected trunk's settings should be copied to.
• The Restore Default Settings functional link restores the default signaling settings of the selected ISDN trunk(s).
• The Select all checks all existing trunk(s) in the table.
• The Inverse selection inverses the current selection (if no trunks are selected, clicking on inverse selection will check all trunks).

The ISDN Stats link is displayed for every active trunk of Quadro and leads to the page where ISDN trunk and traffic statistics can be viewed.