TDM voice card properties reference

The following properties are provided for voice cards and voice card trunks. Properties are in alphabetical order and identified by card type.

 

Applicable Cards

Field

Description

PCM32

DP

DT

NGX

LD

Audio Detection Method

Select Signaling, Energy or Human Voice and set the start/stop time as described under Start Trigger Duration and Stop Trigger Duration.

  • Signaling—Select this option for D-Channel-based recording.

  • Energy—The recorder will start or stop recording based on detection of any sound, including but not limited to a human voice.

  • Human Voice—The recorder will start or stop recording based on detection of a human voice (also referred to as VOX recording).

Set the start/stop time as described under Start Trigger Duration and Stop Trigger Duration.

 

 

 

 

 

Audio Format

Defines the method for encoding the audio data in a .WAV file. This field is editable and required.

Options: Alaw [VAD], uLaw [VAD], G.723.1 (5.3 K) [VAD], G726, and G729A

 

 

 

 

 

Card Type

The model number of the voice card. Read-only.

Examples: DP3209, DP6409, DP3209, DP6409, NGX800, NGX1600, NGX2400, LD409, LD809.

For NGX cards only: You can add an NGX80 daughterboard that increases the channel capacity of the card. In Windows device manager, the card shows as NGX800.

 

 

 

 

 

Data Source

Lists phone switches (data sources) associated with the Recorder (configured in Enterprise Manager). The message Please Select DataSource appears when the Recorder is not associated with any member groups. Optional.

 

 

 

 

 

DTMF Digit Detection

Select to enable Dual Tone Multi Frequency (DTMF) digit detection. If deselected, any numbers (for example, a credit card number) entered by a caller using DTMF digits will not be stored with the recording data. Default: Enabled.

 

 

 

 

 

Fallback Time (sec)

Maximum elapsed time before the Recorder switches to tap sense mode if there is a loss of CTI feed. Default: 0. Required.

 

 

 

 

 

Framing

Framing standard to use.

T1 options include:

  • ESF (Extended Super Frame): default, a framing standard that includes cyclic redundancy checks (CRC).

  • SF (D4): Super Frame, also known as D4.

E1 options include:

  • Basic G.704: default, a frame alignment standard that includes CRC.

  • CRC-4: a 4-bit, cyclic redundancy check that ensures data integrity.

 

 

 

 

 

Inbound CAS Idle Code (appears only for non-ISDN protocol)

Defines the four-bit pattern used by the transmitting switch to indicate on-hook for the inbound signal. CAS is an acronym for Channel Associated Signalling.

Range: 0000 - 1111. Default: 0.

Applicable only when the protocol is Non-ISDN and the Audio Detection Method is Signaling.

T1 itself uses a 2-bit pattern so for T1 lines you would repeat the 2 bit pattern as a 4 bit pattern. For example, 01 becomes 0101.

 

 

 

 

 

Input Companding Type

Choose the format to encode audio on the wire—this must match the switch configuration. Options are Alaw (regions with E-1 circuits) and uLaw (typically North America and Japan).

 

 

 

 

 

Line Build Out

An estimate of the cabling required within the building/facility used by the signal repeater function in the copper line.

 

 

 

 

 

Line Coding

Describes the method used to translate digital data into an electrical signal.

T1 options include AMI and B8ZS.

E1 options include AMI and HDB3.

  • AMI (Alternate Mark Inversion) specifies that there are three states of the line: no voltage is a zero, positive voltage is a one (or mark), and negative voltage is also a one (or mark). Because of the inversion of the voltage for each ‘mark’ or one, sent, the receiving equipment can easily determine the data rate of the line and not lose synchronization.

  • B8ZS (Bipolar with 8 Zeros Substitution or Binary Eight Zero Substitution) is a method of line coding used for T1 lines.

  • HDB3 (High Density Bipolar of order 3 code) is used mainly in Japan, Europe and Australia (for E1 lines) and is based on AMI. It is also very similar to the B8ZS encoding used in T1 lines.

 

 

 

 

 

Max Record Time (sec)

Maximum record time for a single call segment. Required. Default: 3600.

 

 

 

 

 

Member Group

Selected data source’s eligible member groups. Configure member groups within the Data Source in Enterprise Manager. You cannot assign a single member group to more than one card. Optional.

 

 

 

 

 

Mode

Defines whether the card is operating with the E1 or T1 firmware on it. T1 is used in the United States, Canada, and Japan. E1 is used in most other countries. Default: T1

 

 

 

 

 

NFAS Group (appears only for T1 lines with NFAS protocol)

Identifies the Non-Facility Associated Signalling (NFAS) group of which the span is a member.

Applicable only when the protocol is NFAS, at which point this setting is required. Range: 0-31. Default: 0.

 

 

 

 

 

NFAS Index (appears only for T1 lines with NFAS protocol)

Identifies the span within an NFAS group.

Required for NFAS protocol. Range: 0-31. Default: 0.

 

 

 

 

 

NFAS Type (appears only for T1 lines with NFAS protocol)

Identifies whether the span is used for voice-only or whether it contains the D-Channel for the group, or the backup D-channel for the group.

Required for NFAS protocol. Options: D, Backup, or None. Default: D.

 

 

 

 

 

Outbound CAS Idle Code (appears only for non-ISDN protocol)

Defines the four-bit pattern used by the transmitting switch to indicate on-hook for the outbound signal for Channel Associated Signalling (CAS).

Range: 0000 - 1111. Default: 0.

Applicable only when the protocol is Non-ISDN and the Audio Detection Method is Signaling.

T1 itself uses a 2-bit pattern so for T1 lines you would repeat the 2 bit pattern as a 4 bit pattern. For example, 01 becomes 0101.

 

 

 

 

 

PBX Type

Choose from list the type of PBX switch with which the Recorder is interfacing.

 

 

 

 

 

PCI Bus Number

The PCI bus number on the PC motherboard. Read-only.

 

 

 

 

 

PCI Slot Number

The PCI card slot number on the PC motherboard. Read-only.

 

 

 

 

 

Protocol

Describes the multiplexing protocol used, such as ISDN or NFAS. The protocols available depend on whether you select T1 or E1.

 

 

 

 

 

Rollback Buffer (ms)

Interval (milliseconds) to automatically capture voice before the Start Record command begins. The buffer enables the Recorder to compensate for delays in CTI processing and automatically rollback the voice and begin recording before the actual start record request is received.

DP and DT default: Enabled? Yes. Default value: 1000. Range: 0 - 99000.

PCM32, NGX, and LD default: Enabled? No. Default value: 0. Range: 0 - 99000.

 

 

 

 

 

Serial Number

The unique serial number of the voice card. Read-only.

 

 

 

 

 

Start Trigger Duration (ms)

Defines the interval (milliseconds) when sound needs to be above the threshold before the VOX method identifies a call. The threshold is configurable on each channel. Change the value in increments of 28 by sliding the bar.

Required. Range: 0 to 5000. Default: 250.

 

 

 

 

 

Stop Trigger Duration (ms)

Defines the interval (milliseconds) when sound needs to be below the threshold before the VOX method determines a call has ended. The threshold is configurable on each channel. Change the value in increments of 91 by sliding the bar.

Required. Range: 0 to 13000. Default: 5000.

 

 

 

 

 

Termination Impedance

Determines whether the span will be terminated with Low Impedance for normal connections, or High Impedance for N+N redundant Recorder configurations. Values are Low Impedance (Terminated) and High Impedance (Non-terminated).

N+N refers to having one backup Recorder for each Recorder in a system. So if you would normally need 5 Recorders to cover a particular number of channels, you would deploy 10 instead: 5 main and 5 backup Recorders.

 

 

 

 

 

Warn Tone

Warn tone setting that will alert the listener on the call that the call is being recorded. Pre-defined selections are: Europe, US-Canada, Australia, and None. Default is None.

 

 

 

 

 

Zero Code Suppression

A technique implemented on T1 lines to ensure density. The density is a requirement imposed by the use of AMI as the line code on a T1. In this line code, a long series of the zeroes (that is, more than 15) leads to loss of clock and loss of synchronization.

This field does not appear if the line coding is B8ZS. If you select the ISDN protocol, then you should TE/NT. If you select RBS (Robbed Bit Signalling), three timers are displayed. For these timers, accept the defaults or type new settings.

 

 

 

 

 

Modify DP voice card properties

Modify PCM32 voice card properties

Modify DT voice card properties

Modify NGX voice card properties

Modify LD voice card properties