How it works

To upgrade either TIM Plus or TIM Enterprise into a high-end voice recording solution, you just need to add our Echo call recording option.

If you use PRI, BRI or Analogue lines, this will include one or more of our Echo hardware devices.

For SIP lines, no additional hardware is required. However, in order for Echo SIP to collect call audio information it must be installed on a computer that has an additional network card connected to a mirrored port on a local managed network switch.

In order to determine the specific add-ons required to add the recording option, you'll need to determine the number of sites and the type of lines on each. e.g.

Site 1 30 x PRI-channels and 8 x SIP Channels
Site 2 08 x BRI-channels and 10 x SIP Channels

ISDN PRI/BRI or Analogue trunks

For this type of telephone line, you'll need to add hardware. The choice of card or unit deployed will be determined by the size and complexity of your system. For sites with Analogue, BRI and smaller PRI sites, this is typically a USB Box or PCI card. For sites with a larger channel count, we tend to supply the HyperArray Voice Recording Units.

These hardware devices passively intercept your phone lines, monitoring and recording all calls that pass along your lines.

The different types available allow you cover all line combinations including PRI (T1/E1), BRI and Analogue. For more information on all hardware devices, just click on the hardware tab alongside.

D-channel signalling supports Call Setup, Connect, Clear, DDI number and CLI number decoding. It also supports all major ISDN variants, Q.SIG, DASS-2, DPNSS and various PBX Digital handset D-channel protocols. Simultaneous recording on all channels of both upstream and downstream sides of a conversation is catered for.

On-board DSPs and large streaming buffers impose very little demand on system and application resources.


Our software-only VOIP recorder, Echo, complements the TIM Talk solution, providing call recording integration for both SIP and SCCP (Cisco Skinny) calls.

Simply choose a strategic point in your network that is party to your VOIP traffic, then mirror it to a computer running Echo. TIM Plus and TIM Enterprise will then benefit from the same "click-to-play" call recording integration as that provided by our ISDN and analogue hardware taps.

Echo supports VOIP traffic that uses the G711 codec - either a-law or mu-law, and has an exceptionally-high compression rate with virtually no loss in quality, storing an average 3 minute call in less than 350KB! Zero-configuration STUN port reconciliation is automatic, so placing your mirror in any reasonable part of the network is supported.

The primary network card would have its IP configuration setup so it is visible on the data LAN. This allows playback of recordings by authorised users of the system, as well as remote control (such as Remote Desktop) of the Echo server if required.

The secondary network card would have its IP configuration setup so it is visible on the SIP/telephone network. This will allow it to have mirrored traffic sent to it for monitoring and recording by the Echo server.

Industry standard AES 256-bit symmetric key encryption is built-in as standard, and call obfuscation (masking sensitive parts of a call) is possible by either DTMF digit entry or through our API to integrate with your own systems.

Echo is fairly priced, governed simply by the number of concurrent VOIP conversations it sees.

SIP trunk example

The example below shows the network layout for an installation that would allow recording of external calls across SIP trunks.

Monitoring the trunks allows any phone system or handsets to be recorded. This includes proprietary handsets which would normally be expensive to record extension-side.

The managed switch needs to be configured to mirror the port where the telephone system would be sending the SIP/RTP call information.

SCCP/SIP extension example

The diagram below shows an example of network layout for an installation that would allow recording of internal (depending on configuration) and external calls across the telephone network.

Monitoring handsets that are capable of either SCCP or SIP communication allows generic recording to occur no matter what combination of PSTN interfaces are in use (E.G. SIP, PRI, BRI, analogue).

There are two ways the monitoring can be configured for recording extension side audio. The first method will record external calls only, whereas the second will record all calls but will add further load to the managed switch.

External only: The managed switch needs to be configured to mirror the port where the telephone system connects to the telephone network.

All calls: The managed switch needs to be configured to mirror every port that has a telephone connected to it, but the telephone systems network connection does not need to be mirrored.

The second method allows the collection of the internal RTP traffic that would not be seen at the telephone systems network connection.