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To set slot parameters for the VX chassis, use tools in the Chassis directory for the VX node.

View Chassis Slot Settings

Select the Chassis directory for the VX node and view contents at the Chassis Slots screen.

Add Chassis Slot

Insert a new line in the Chassis Slots screen, then double-click on the new line to present the Edit Slot dialog box.

Modify Chassis Slot

Double-click on an entry in the Chassis Slots screen, to present the Edit Slot dialog box.

 

Edit Slot Dialog

Field

Description

Unchanged
Disabled
Enabled

Enable or disable the slot.

Slot

Slot number on the VX chassis to be configured.

Description

Optional field in which to provide a descriptive statement about the slot or the card in the slot.

Slot Type

Drop-down selection range from which to define one of the following types for the slot:

  • STI-16/DSP – 16 port T1/E1 Interface/Voice Card. Provides DSP resources for each channel (DSP resources can be used for channels from the rear T1/E1 interface or for channels switched from the other card); a total of 480 VoIP channels are provided by the card, regardless of which interface provides the channels.
  • STI-2-DS3 – Dual T3 Interface Card Provides full switching of two DS-3 communications interfaces (1344 DS-0s)
  • SSI-2-SS7 – SS7 Card with T1 or E1 interface
    Provides support for the SS7/C7 PSTN Signaling protocols
    Interface choices are either dual T1 or dual E1.
  • SSI-4-SS7 – SS7 Card with T1 or E1 interface. This card provides support for the SS7/C7 PSTN signaling protocols.
    Interface choices are either quad T1 or quad E1.
  • STI-8/DSP – 8 port T1/E1 Interface/Voice Card
    Provides DSP resources for each channel (DSP resources can be used for channels from the rear T1/E1 interface or for channels switched from the other card); a total of 240 VoIP channels are provided by the card, regardless of which interface provides the channels.
  • Virtual – No slot is actually involved
    The virtual slot can have any number of H.323, SIP, and BSP ports. Only slot 15 should be designated as virtual.
  • Unused – No configured card in slot.

Tone Table

Select the tone table to be loaded onto this board. Only boards with a DSP support loading of the tone table.See the Tone Table topic for information on adding or modifying tone tables.

Enable automatic Gain Control

Check this box to enable automatic gain control

Idle Line Pattern

Used to set the SA (Signal Associated) bits in a NFAS (non-frame alignment signal) frame, and match the remote end for bringing the T1/E1 framer up. Select from the drop down list. When the Slot Type is set as "Unchanged", the following are available options:

  • Auto
  • 0xD5(Zero Alaw)
  • 0xFF(Zero Ulaw)
  • 0x55(-Zero Alaw)
  • 0x7F(-Zero Ulaw)

Payload Features

From the drop-down menu select STU, V.150.1 UMR, or None.

Min DTMF SNR

Min DTMF SNR is the minimum Signal to Noise Ratio for incoming digit tones to be detected by VX. By default this is set to 12db, but this can be set in case of noisy voice stream from ISDN. Select from the drop down list.