The Telephony Port settings allow you to configure the physical properties of the telephony trunks (T1/E1) and analog ports (FXS). Digital trunk type selection (T1 or E1, ISDN or CAS) and analog line profile selection are done here. To configure the protocol layer settings, see the respective signaling group settings for ISDN and CAS.
If the expected port type is not listed in the Port Table View, check the node's Inventory Report to verify that the physical ports (FXS, FXO, BRI, and DSI hardware modules/line cards) are licensed. The physical hardware must be present and licensed for it to be displayed.
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The effect of not using partial T1/E1 support when limited numbers of leased channels are available is that some calls (those exceeding the provisioned channel capacity of the T1/E1 line) will not be successful. For example, if a branch office has lease only four channels, and the SBC is not configured for partial T1/E1, if there are already four channels in use and the SBC attempts to place a call on the fifth or any succeeding channel, the carrier will simple reject the attempt and return a response code.
Channel Configuration on T1 Ports
The number of channels for a T1 port can vary from 1 to 23, with channel 16 reserved as the D-channel.
Channel Configuration on E1 Ports
The number of channels for an E1 port can vary from 1 to 30, with a start channel in the range 1 o 30, excluding channel 16 (D-channel).
The SBC does not support NFAS like configuration, wherein multiple T1/E1 ports may have a primary and backup D-channel and not all T1/E1 ports need to have 24th/16th channel reserved for D-Channel.
The number of channels on a port are configurable in the Port and Protocol panel of the Signaling Group when the Fractional option is selected.
In the left navigation pane, go to Node Interfaces > Ports.
Port Table View
To view a Telephony Port's properties:
Sonus SBC 2000 T1/E1 Line Card ports are automatically discovered and populated in the Ports Page area of the configuration as shown in the System tab and when Checking Port Status in the Settings tab of the WebUI. Physical T1/E1 Ports associated with hardware in the SBC System cannot be deleted.
When a line card is physically removed, its configuration is maintained but its ports will not be present when Monitoring Real Time Status. This is done for the case where you are replacing or servicing a line card.
If you have permanently removed or changed the type of line card (e.g., from an 8-port to a 2-port card), then the ports listed in the SBC configuration are no longer associated with present hardware and hence can be deleted via the WebUI. Take the following common scenario:
To delete unused ports, simply select the checkbox next to the port(s) you wish delete, then click the Delete (
) icon located at the top of the window.Sonus SBC 1000 Telephony Ports cannot be deleted via the WebUI.