Polycom Electronic Hook Switch Guide

This .e4 report entry shows phone administrators and end users how to use a Plantronics wireless headset and electronic hookswitch (EHS) with Polycom SoundPoint IP  and VVX Business media phones.

Some Plantronics headsets enable you to answer and complete phone calls using the built in controls located on the headset. This feature is called electronic hookswitch (EHS). To use it, your headset must include a digital serial control interface in addition to the standard analog headset jack (RJ-9) interface. The serial control interface requires an APP-51 which you can purchased from e4. All Plantronics Headsets that support EHS come with a base unit that connects to your phone. The base unit and headset will connect wirelessly.This enables you to answer the phone when away from your desk by pressing the button on your headset. All of the Plantronics headsets in the guide have a wireless range of over 300′ from the phone.

Supported Phones:

As of 3/14/2013 the following Polycom SoundPoint IP phone support EHS. IP 320, IP 321, IP 330, IP 331, IP 335, IP 430, IP 450, IP 550, IP 560, IP 650, IP 670.

As of 3/14/2013 the following Polycom VVX Business media phones support EHS. VVX 300, VVX 310, VVX 400, VVX 410, VVX 500, VVX 600, VVX 1500.

Supported Plantronics Headsets:

This guide will focus on the PlantronicsSavi 700 series, CS500 Series and Plantronics MDA200 device which enables the management both Polycom desk phones and PC calls.

Please note: Legacy Plantronics Savi Office models such as  the WO100, WO200, WO300, WO350 and Plantronics CS models 50, 55, 60, 70N, 261N, and 351N  support EHS with Polycom phones using the APP-50 EHS cable and APP-5 cables respectively.
Plantronics Savi 700 Series:

Plantronics CS500 Series:

  • CS540 Convertible P/N 84693-01
  • CS530 Over-the-ear P/N 86305-01
  • CS520 Over-the-head (binaural) P/N 84692-01
  • CS510 Over-the-head (monaural) P/N 84691-01

.e4 also carries the Microsoft Lync enhanced versions of the these headsets for those using the MS UC platform.

The following image set demonstrates the proper setup for using Plantronics headsets with electronics hookswitch support and you Polycom telephones.

All headsets listed in this article are available through .e4. Please contact Daniel Bonham our resident headset expert at 877-434-8647 x102 to obtain special pricing and advice on which Plantronics model is right for you.


How to: Aastra Web Recovery Mode


The Aastra web recovery mode allows your phone administrator to restore a phone to it’s factory state in the unlikely event that your Aastra SIP phone’s default firmware becomes corrupt.

This issue is generally reported after the device was interrupted while downloading the required *.st binary package or after switching from PoE to AC.

When your Aastra SIP phone is in web recovery mode the phone will power up and the LCD will be blank. At this time the phone is unusable. To start the recovery process please refer to the steps below. In our example we will be using PBXact. You can also utilize the steps listed by pointing the phone at your own TFTP server.

Aastra Web Recovery Mode Step by Step:

  1. Reboot your Aastra SIP Phone
  2. As it  reboots quickly press and hold 1 + # untill the phone’s IP address is displayed.
  3. From a computer on the same network as the Aastra phone, visit the IP displayed
  4. You will see many fields on this page- only 2 are used:
    1. Filename:
    2. TFTP Server IP:
  5. In the Filename field, enter the name of your phone’s model firmware file.  Aastra firmware file naming convention is a follows – See list below for the correct entry.
    1. Aastra Firmware files are named:
      480i Cordless.st
      480i CT.st
  6. In the TFTP Server IP field, enter the IP address of your PBXact or TFTP server .
  7. Click Download Firmware button
  8. The phone will then contact your TFTP server and download the file listed in the file name field. Please be sure to let the phone return to default before disconnecting the device.

Need help with you Aastra phone or Asterisk PBX? Not sure what phone system is right for your business?. Click Here to reach our expert team by chat or call us any time at 877.434.8647

Switchvox How To: internal Peering

If you have been working with Switchvox for any amount of time you know that
the system is jammed full of useful features that can be deployed with the click
of a mouse and a few keystrokes.  Over the years, as my Switchvox skill set
grew, I’ve noticed that you can create many workarounds simply by mashing
multiple features together and by trying things that you wouldn’t think will

I read an interesting post on the new Switchvox forum over at
Digium.com  today.  The poster
asks the question, is there a way to alter caller ID on demand for internal
extension.  The answer is yes. Not sure exactly why you’d want to do this
but It is completely possible. For this we’ll make use of a small work- around
that I figured out some time ago that can be used for so many wonderful things.

Peering Switchvox to itself: This workaround was originally
discovered when I was not going to get a deal based on the system’s inability to
do six digit extensions. (This is now a function of SWVX) this workaround saved
the day, and we’ve won the customer and are rolling roughly four systems a month
to this very same customer.

Ultimately,  this workaround is a testament to versatility of Switchvox.

Creating the Peer:

For this we’ll use the exact same methodology as peering two Switchvox
systems together but in this example we have only one Switchvox server. Today
I’m using our
Switchvox AA60 SMB.

Logged in as admin, navigate to: System Setup > VOIP Providers.

You’ll need to create two new IAX Providers

Select IAX Provider from the Add New: Pull Down Menu then press go.

Create a new IAX Peer with these specs:

The Create a Second IAX Peer with these settings:

Next Navigate to: System Setup > Outgoing Calls > Add New Outgoing

Create Rule Like this-  Can be tailored to match your Extension

Create Caller ID Change:

Next Navigate to: System Setup > Outgoing Calls > Add New
Caller ID Rule

In this Example the calling extension will first dial their Extension number
then the Extension number that they want to call with the altered caller ID

caveat – Be sure that your phone’s dial plan can support the additional
numbers when calling extensions. adding x’s to your dialplan may result in
needing to press send or dial on your phone.

Polycom Example


Here’s what it looks like when EXT 103 Calls EXT 100 (My New Cisco

Hopefully you find this useful… After tinkering with this for a while I
found that there are quite a few things you can do with this – A few other
examples of what I have done with this are creating “Meet Me” conference rooms
with pin numbers on Switchvox Free Edition and also creating passwords for
getting to our paid after hours support product.