requires 2-wire analogue inputs. A digital line signal will first need
to be converted to analogue before being recorded.
can be installed to record from any one of six possible signal sources:
An analogue trunk (exchange)
An analogue extension line.
A telephone handset, either
analogue or digital (via handset splitter).
A digital extension line,
using D/A converters.
A digital trunk line, using
A radio or other audio signal
presented as a two-wire analogue interface.
standard and special order cables and/or adapters are available from
your Total Recall representative. If you require a
different cable or adapter than was supplied with your unit, contact
your representative for assistance.
DSP Card identification
has either 4 or 8 RJ11C/RJ12/RJ14 line interface sockets.
The two-wire interface uses pins 3/4 (the center pair) of the
RJ11C/RJ12 connector, the four-wire interface uses pins 3/4 and pins 2/5
of the RJ11C/RJ12/RJ14 connector. The 8-channel DSP card has gray color
four-way RJ11C/RJ12/RJ14 connectors and the 4 channel DSP card has black
color four-way RJ11C/RJ12 connectors.
Connecting to the Telephone Network to Record Calls
The location of the
recorder, in a communications room or office area, will depend on issues
such as user access, security access, telephone wiring and available
Recall line interface is two-wire analogue.
The connector terminations on the rear panel of the recorder are
standard RJ11C/RJ12/RJ14 sockets.
The line interface on
the recorder is a terminating point and not a pass-through point and,
therefore, it is not possible to connect the recorder in series with a
telephone handset. The
line interface connection from the recorder must be run back to a
termination point. This
termination point is normally a parallel tap to an extension line, a
trunk line or a handset (analogue or digital phone), depending on the
installations have an MDF or distribution frame fitted between the
incoming trunk lines and the premise equipment.
The trunk lines are terminated to the MDF, and then connected
through to the PABX. Similarly,
there is normally a distribution frame on the extension (office) side of
the PABX. From this frame,
the telephone cabling is routed through the office/work area to
individual telephones, or telephone connection points.
Location of the Recorder
The recorder can be
located near the PABX and distribution frame, or near the designated
user(s) in the office area. Care
should be taken when planning the installation to ensure that telephone
cable runs and ease of access to the recorder are considered.
When recording from
analogue trunk or extension side, the phone line needs to be tapped or
patched. Installing a
distribution strip close to the MDF/Distribution Frame (MDF/DF) and
patching a short cable from the strip to the extensions on the MDF/DF do
this. The line
interface cables from the recorder are then wired directly to the strip.
Analogue Trunk or Analogue Extension Lines
can be connected to the trunk side or the extension side of the PABX,
depending on user preferences and operational requirements.
The main difference
is that an extension side connection will enable the recording of
internal (extension to extension) calls.
In this case, the extension number dialed will be recorded as a
search field, provided the handset generates a DTMF dialing tone.
If the number of
extensions exceeds the number of trunks, and the requirement is only to
record external calls and not internal office calls, then the recorder
can be connected to the MDF or distribution frame on the trunk side.
Connecting on the trunk side will also ensure Caller-ID capture
if Caller-ID is activated.
In the example above,
the recorder is patched onto a distribution strip within the
communications or PABX room. Only
three of the five available extensions will be recorded. If required,
the recorder could be located out in the office area and wired back to
the distribution frame.
In the example above,
Total Recall is patched directly to analogue trunk lines.
All call activity, incoming and outgoing, will be recorded.
The recorder can be located in the Comms/PABX room, or in the
Connecting to a Digital Handset using Handset
installations are digital. It
is common to have digital signaling on the extension side, with analogue
trunk lines installed.
It is important to
know the configuration of your PABX system before installing a voice
logger. Total Recall
will not record a digital line signal directly into the recorder, so
digital to analogue conversion must be done prior to the line interface
on the recorder. Also, you can use the existing D/A converter that is
built into digital phones by tapping the analogue audio at the
handset/headset connection with a handset adapter.
Total Recall does not provide D/A conversion.
If needed, a third party product would be required for this
two-wire analogue, most digital PABXs generate their own signaling
protocol, and therefore recording from digital lines or handsets can be
different for each application.
Most digital handsets
have audio signaling in the hand piece, with the speaker (earpiece) and
microphone (mouthpiece) channels being connected to the recorder.
A “Handset Adapter” can be used to parallel tap this audio
signal from the hand piece, and wire directly back to the recorder.
It is possible to find a signal level difference between the
speaker and microphone and therefore, in a recorded conversation, one
party may be heard more clearly than the other.
(This is a limitation of recording via handset adapters and not a
Combinations of PABX
and digital handsets can also produce variable signal levels.
It is not possible to capture incoming call (CLI) data on the
recorder when using handset adapters, as the recorder connection is to
the hand piece rather than to the incoming line.
Also, with some handsets, standard DTMF signaling tones are not
transmitted and thus will not be captured by the recorder.
adapters/logger patches are available from your supplier (Omnicron item
# TSA-3LM, TSA-SLM, etc). Your supplier should be able to advise on a
suitable handset adapter, compatible with the line signaling and wiring
of the handsets installed.
The diagram below
shows a “representation” of how handset adapters may be used to
enable recording direct from digital handsets. SMDR data option is
available on special order for some phone systems.
Connecting to a Digital Extension Line
It is possible to
connect (tap) directly to a digital extension line by using a Digital to
Analogue (D/A) converter.
D/A converters are
normally switch and protocol-specific, often using PABX
protocol-specific interface cards in a rack mount configuration, with 1
or 2 connections per line card.
A D/A converter will
monitor activity on the line, and reformat the digitized information on
the line into a standard analogue format required by most recorders. The
D/A converter will passively capture both sides of a conversation and
send the audio signal to the recorder only when a conversation is
D/A converters need
to be installed in the Communications/PABX room, in close proximity to
the PABX. There is normally a distance limitation between the D/A
converter and the recorder. As with handset adapters, D/A converters are
generally available from local suppliers.
does not provide this D/A conversion facility.
Line Interface to Total
(CLI & DTMF capture)
For extension side
recording, each line is dedicated to a specific channel, and will always
record the same channel unless the line is disconnected or physically
changed to another port.
For trunk side
recording, the next call in or out will generally pick up the next
available channel on the recorder, so agent calls are not channel
If the recorder is
connected trunk side on an analogue line, and an operator/receptionist
answers the incoming call, the recorder will record the operator’s
comments, and also the continuing conversation of the call if it is
transferred. However, in this scenario, the recorder will not capture
the agent’s extension number.
The CLI (Caller ID)
data will only be captured if it is embedded in the incoming call data.
The recorder is
designed to detect DTMF tones on dialing and display the “Dialed
Number” in the Number Field of the call record. If DTMF is not present
at the point of recording, then the DTMF number will not be displayed.
If Caller-ID is not present at the point of recording, then the DTMF
number will not be displayed.
It may be possible to
capture additional data fields from the SMDR port of the PABX, and
append some of this data to the recorded call.
The SMDR connection
to Total Recall is via a serial link, and Total
Recall would need to be located in close proximity to the PABX.
SMDR integration is
PABX specific and the software must be customized for each application.
The standard Total
Recall package does not include the SMDR option or integration
Specific requests for
SMDR integration must be detailed in writing, and a sample packet
capture from the SMDR port of the PABX is mandatory.
from SMDR integration may include, but is not limited to, the following.
Caller I.D. information (some
Log-on/Log-off data (some
Recording Stop (overriding VOX)