Connecting An Analogue Call Recorder; Sip Trunk Recording - NEC Univerge SV8100 SL1000 Installation Manual

Connecting an Analogue Call recorder

The Analogue call recorder has a different power supply to the other call recording units, ensure that
the correct power supply is attached to the analogue call recording box. The analogue call recorder
wiring should be connected by tapping into the line and presenting the two wires to an RJ45 socket on
the front of the call recording unit. A lead is provided that will connect from a standard LJU (BT Style)
socket to the front of the call recording unit. The BT socket is also re-presented so that the line can
be connected to a PBX.
The image below shows a standard LJU socket with the supplied lead connecting from the LJU to the
call recording unit. The socket indicated by the red arrow is the socket that can be connected to the
PBX. This will need repeating for each line that will be recorded.
Should the cables that are provided not be suitable then the two wires provided by the carrier will
need to be connected to pins 4 and 5 of an RJ45 socket that is connected to the front of the call
recording unit.

SIP Trunk Recording

SIP trunk recording doesnt require any physical hardware to be installed, it instead uses packet
sniffing technology to record calls. Both G.711 and G.729A codes are supported for SIP recording,
other codecs cant be recorded. A port mirror from a network device carrying the SIP trunk calls has
to be connected to a network card in the call recording server. The network card in the call recording
that will perform the packet sniffing must support promiscuous mode. Promiscuous mode will allow a
network card to pass packets that are not addresed to it allowing the calls to be recorded. Depending
on the device performing the the port mirror, it may be neccesary to have a second card in the call
recording server to capture the SIP packets.
The port mirror can be placed in two different locations depending on the configuration of the network
and how the IP trunks are presented to the SV8100 / SL. If there is a dedicated internet circuit
provided for the SIP trunks, then the port mirror would be best placed on the port uplinking the router
to the LAN.
The port mirror can also be placed in-line with the IPL card of the SV8100 / SL, this will capture all
traffic passing through the IPL. The only draw back to using this method is that IP extension calls will
be recorded too. As MyCalls doesnt report on internal calls then any internal calls cant be played
back using MyCalls. This would also mean if an IP extension made a call on an SIP trunk there would
be two calls recorded.