Aastra ITE-760 User Manual download pdf (Page 16)

Call Recording Solutions

Versadial Solutions

9940 Irvine Center Drive, Irvine, CA 92618

949-457-0650

www.versadial.com

ver. 0512

Passive VoIP Recording Checklist

NETWORK TAP

Network taps (SPAN ports or Mirror ports) are used to create permanent access ports for passive monitoring. The

trafc to and from a number of network devices (VoIP telephones) is copied to a single port of a network switch.

Usually, this port could be any of the switch ports; the port is simply congured as SPAN port. This SPAN port allows

customers to record several VoIP telephones by spanning the VoIP telephones to this particular port on the network

switch. The network switch might have the option to SPAN trafc received (Rx) and/or send (Tx)

per network device. In this case there are two congurations possible:

1) SPAN all received trafc (Rx) for all VoIP phones AND the Call Manager.

2) SPAN all received (Rx) AND send (Tx) trafc only for all VoIP phones/extensions.

Option 2 is preferred as it only SPANS the trafc for the recorded VoIP telephones.

VLAN

In order to make the SPAN port conguration easier, a VLAN is useful. In practice, some customers will already use

a separate VLAN for VoIP trafc for QoS purposes. QoS stands for ‘Quality of Service’ and is used to prioritize net-

work trafc to guarantee sufcient bandwidth for VoIP telephony. A VLAN is a ‘logical’ group in the network. All trafc

from this group could be recorded by SPANNING this VLAN. When a customer adds more phones to this VLAN they

are automatically put on the SPAN port.

RSPAN

RSPAN stands for REMOTE SPANNING. This is used to put trafc on a SPAN port from different network switches.

In case more switches are used in a building, all VoIP trafc is put on one SPAN port on a singe network switch. In

order to do so the following steps must be taken:

1) Create a VLAN and congure this VLAN as REMOTE SPAN VLAN.

2) All network switches must have this VLAN using the same VLAN name.

3) Put all VoIP devices on this VLAN either by spanning per network device or by a local

4) VLAN with all devices, which is spanned to the remote SPAN VLAN.

5) Create a SPAN port spanning the REMOTE SPAN VLAN on one of the switches.

6) This SPAN port will output all network trafc from the several switches.

This technology is also used to record multiple sites with a central recorder. In this case bandwidth (WAN) is an is-

sue and audio compression is no expectance.

KNOWN SPAN/SWITCH ISSUES:

Many of Cisco switches support SPAN. Some more expensive switches support the RSPAN technology. Several

other brands only support PORT MIRRORING. This technology copies the trafc from a single network device to a

specic switch port. Number of the mirrored ports can be limited. Your ability to record VoIP greatly depends on your

ability to SPAN/Mirror trafc from the recorded devices to single network tap. To request help from the Versadial sup-

port team please provide following details:

• Network Switch Vendor (Cisco,Nortel, 3Com, D-Link etc) and Switch Type/Model

• Network Switch Firmware, SPAN /Mirror Limitations

• VoIP system to be recorded

• If trunk side recording is an option for this customer

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 25 26

Comments to this Manuals

No comments

Aastra ITE-760 User Manual Page 16

Comments to this Manuals

Related products and manuals for Telephones Aastra ITE-760