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New Member

IP Phone Monitoring

Hi,

Can an IP Phone have/support a cable "splitter" that allows someone to eavesdrop on a call. If so, is there any special make / model?

Customer is not lookign to you silent monitoring etc. They prefer the old fashion way

J

Everyone's tags (4)
1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Red

IP Phone Monitoring

Hi Jules,

In addition to the great info from Arun (+5 Arun )

If you use Plantronics Headsets there is a "Y" cord made specifically for this purpose.

"Y" Training Adapter -

P/N: 27019-03

Y Adapter Trainer

The  Y training cable allows you to connect two headsets with QD (Quick  Disconnect) connections to one phone.   It also includes a mute switch  which allows you to mute either headset. We have used these in many  environments very

successfully

http://www.plantronics.com/us/product/y-adapter-trainer

Cheers!

Rob

"Always movin' ahead and never lookin' back" - Springsteen

6 REPLIES
New Member

IP Phone Monitoring

Hi Jules,

Feels a bit weird when the facility of silent monitoring or "Barge In" feature gives the customer much more flexibility than going to hard wire the cables. A small demo to the customer should turn him around to use these features.

Anyways, to answer your question, the only thing I can think of is by spanning the switch port to another, hook a laptop to that port and capture the traffic by using a Sniffer or Wireshark tool. You can also use a Hub between the phone and switchport (provided the phone gets power from a power brick and cannot use PoE). A third alternative is to span the switchport behind the phone and connect the laptop/PC with the wireshark/sniffer tool.

There are two drawbacks:

1.) The audio will not be realtime. The customer has to capture the entire traffic before he/she can listen to it.

2.) If the phones are usign SRTP (secure RTP), then this will be more painful since you will have to decrypt the RTP stream before listening to it.

This link lets you know how to listen to the captured RTP stream.

http://wiki.brekeke.com/wiki/Listen-to-call-with-Wireshark?PHPSESSID=8bbf1ba8f60045c0ae86acfaf0210262

Not aware if there is any other RJ 45 cable splitter that can be used to split voice traffic because ideally we are speaking about conferencing three parties into a same call. And conferencing requires conference resources to be invoked.

Regards,

Arun Kumar

Please rate useful posts !!!!

New Member

IP Phone Monitoring

HI Arun,

Thanks for the info.....maybe should have explained it abit better. They are looking for the cable splitter to be on the RJ11 cable going to the headset. ie having 1 phone with 2 headsets.

Cheers

J

New Member

IP Phone Monitoring

Hi Jules,

Rob's solution will work out for the Laptop with USB headsets.

I think a RJ 11 splitter cable can be connected into the phone headset/handset socket. You can google it out.

http://www.google.co.in/#hl=en&sugexp=cqrwrth&gs_nf=1&cp=6&gs_id=4b&xhr=t&q=rj11+splitter&pf=p&output=search&sclient=psy-ab&oq=rj11+s&gs_l=&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=7c9e72d0a8bc1364&biw=1440&bih=645

There are many vendors who offer the product. Haven't tested it out though.

Regards,

Arun Kumar

Please rate useful posts !!!

Hall of Fame Super Red

IP Phone Monitoring

Hi Jules,

In addition to the great info from Arun (+5 Arun )

If you use Plantronics Headsets there is a "Y" cord made specifically for this purpose.

"Y" Training Adapter -

P/N: 27019-03

Y Adapter Trainer

The  Y training cable allows you to connect two headsets with QD (Quick  Disconnect) connections to one phone.   It also includes a mute switch  which allows you to mute either headset. We have used these in many  environments very

successfully

http://www.plantronics.com/us/product/y-adapter-trainer

Cheers!

Rob

"Always movin' ahead and never lookin' back" - Springsteen

Hall of Fame Super Red

IP Phone Monitoring

Hi Arun,

Just an FYI here

The solution I provided is meant for use with Cisco IP phones not laptops

with USB headsets. We use these in many areas on our campus quite successfully.

Cheers!

Rob

"Always movin' ahead and never lookin' back" - Springsteen

New Member

IP Phone Monitoring

Cheers guys. Very helpful

J

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