Where do I obtain ZAC?
Which versions of the OS support ZAC?

Windows 8, 10, MacOS 10.13 or newer

Windows Terminal Server (Microsoft Remote Desktop) (All functions except Softphone audio and TAPI)

Other terminal services such as Citrix, etc. have not been tested. They are likely to work but are not officially supported.

How do I install the FAX print drivers for Windows and Macintosh?

ZAC version 7 (Macintosh and Windows) includes the ability to send PDF documents directly.

How do I improve the resolution of Faxes sent on Windows?

For best quality of fax image, when printing a Fax, be sure the Resolution on the Format screen is set to Fine (not Normal). To permanently set the resolution, follow the instructions below.

  1. Open Devices and Printers from the Start button
  2. Right click on the Zultys FAX device and select Printer Properties (not Printing Preferences)
  3. Click on the Preferences… button in Zultys Fax Properties window
  4. Make the settings the way you want
    1. Force FAX resolution check the box for Create faxable image and click the radio button for 201×196 DPI
    2. Graphic Resolution can be changed as well to Fine 201×196 DPI. Note it is possible to set this higher which may improve the FAX quality but it will greatly increase the length of time it take s to send the FAX.
  5. Click Apply button in Zultys Fax Printing Preferences
  6. Click OK button in Zultys Fax Printing Preferences
  7. Click OK button in Zultys Fax Properties window
Which headsets are supported?

Zultys phones have up to 3 different methods to connect headsets depending on the model.

  1. RJ9 (33i, ZIP 35i, ZIP 33G, ZIP 36G, ZIP 37G, ZIP 43G, ZIP 45G, ZIP 47G, and ZIP 49G)
  2. USB (ZIP 45G, ZIP 47G and ZIP 49G)
  3. Bluetooth (ZIP 45G, ZIP 47G and ZIP 49G)

RJ9 headset compatibility is the same for all these models so if the Plantronics or Jabra web site says the headset is compatible with a ZIP 35i it will work with a ZIP 43G.

The Plantronics (https://www.plantronics.com/us/en/support/compatibility-guide) or Jabra (https://www.jabra.com/compatibilityguide/) web sites may not list all of the ZIP3/ZIP4 models but if they list any of them the others will work as well.

ZIP 4 Series Detailed headset compatibility guide Plantronics, Jabra, Sennheiser
Popular Headsets

  • Plantronics: CS60, CS70, CS500 series, Savi W700 series, Voyager Pro w/adapter, Voyager Legend w/adapter.
  • Jabra: PRO 9400 Series, GO 6470, PRO 920, GN9350e, GN9330e, GN9120 EHS

EHS (Electronic Hook Switch) compatibility enables call control (answer and hang up) from buttons on the headset.

  • ZIP 35i, ZIP 36G, ZIP 37G, ZIP 43G, ZIP 47G phones using RJ9 jacks support EHS with the optional Zultys EHS 3xi Adapter.
  • ZIP 45G, ZIP 47G, ZIP 49G phones using RJ9 jacks support EHS with the optional Zultys EHS 4x Adapter.
  • ZIP 45G, ZIP 47G. also supports Bluetooth headsets with EHS with the optional Bluetooth adapter and USB headsets (see compatibility guide).
  • ZIP 49G phone supports EHS using built in support for Bluetooth headsets and USB headsets (see compatibility guide).
    • Plantronics headsets such as CS500 series that don’t include USB connectivity can use the Plantronics APU-75 EHS cable to connect to the USB port instead.
  • ZIP 59i. Check Plantronics and Jabra web sites for compatible headsets. Built-in support for Bluetooth headsets.
  • Note the ZIP 33i and ZIP 33G phones don’t support EHS.


ZAC softphone no EHS: Call control takes place from ZAC

  • Softphone headset compatibility is based on compatibility with your PC or Mac. ZAC softphone utilizes the native PC or Mac audio drivers. You can connect virtually any headset to the computer and be able to answer calls directly from the ZAC application.
  • USB headsets generally provide better quality than analog headsets plugged into computer audio jacks. Some headsets support very high quality audio with terms like WB (wide band) or HD (high definition) and may include noise cancelling features.
  • Bluetooth headsets will work but audio quality depends on the capabilities of the headset and Bluetooth radios in the computer. Plantronics Voyager Pro HD and Plantronics SAVI W440 are examples of high quality Bluetooth headsets. Plantronics also sells the BT300 adapter for computers that lack high quality Bluetooth radios. Most Windows computers don’t include the high quality Bluetooth radios but most Macintosh computers do.
  • If callers report they hear an echo when talking to you, go to the computer Control Panels/System Preferences and reduce the sound input or output level until the echo goes away. This is usually a very small adjustment.

ZAC softphone with EHS: Most Plantronics USB and Bluetooth headsets use the modern HUB architecture and are automatically supported when using ZAC on your PC or Mac. No driver software needed.

  1. Connect Plantronics headset
  2. Open ZAC and Bind to Internal Softphone
  3. Go to ellipsis (…)/Settings
  4. Click on the Softphone icon and select Plantronics device
Which phones support EHS (Electronic Hook Switch) headsets?
Phone modelConnectionsEHS
49GRJ9/USB/BluetoothZultys EHS 4x Adapter, Plantronics EHS APU-75 or APU-76 Cable to USB, USB and Bluetooth
47GERJ9/USB/BluetoothZultys EHS 4x Adapter, Plantronics EHS APU-75 or APU-76 Cable to USB, USB and Bluetooth
47GRJ9/USB/BluetoothZultys EHS 4x Adapter, Zultys EHS 3xi Adapter, Plantronics EHS APU-75 or APU-76 Cable to USB, USB and Bluetooth Adapter
45GRJ9/USB/BluetoothZultys EHS 4x Adapter, Plantronics EHS APU-75 or APU-76 Cable to USB, USB and Bluetooth Adapter
43GRJ9Zultys EHS 3xi Adapter
37GRJ9Zultys EHS 3xi Adapter
36GRJ9Zultys EHS 3xi Adapter
35iRJ9Zultys EHS 3xi Adapter
33GRJ9Not supported
33iRJ9Not supported
23GRJ9Zultys EHS2xJ for Jabra, Plantronics EHS APD-80
22GRJ9Zultys EHS2xJ for Jabra, Plantronics EHS APD-80
21iRJ9Zultys EHS2xJ for Jabra, Plantronics EHS APD-80
59iRJ9/BluetoothEHS built in and Bluetooth
ZAC Softphone Windows & MacintoshUSB/BluetoothPlantronics headsets that support the newer HUB architecture. The Plantronics driver is built-in.
MXIE Softphone
Windows Only
USB/BluetoothSelect Plantronics with SDK Lite software headsets that support the older Plantronics Spokes architecture. Savi W710 and W740 have been tested. Download Plantronics SDK Lite from MX’s web page.
Why doesn't a phone number dial after entering the digits on the phone?

An action is needed such as picking up the handset or pressing the Speaker button on the phone or pressing the SEND key (like on a cell phone)

Why doesn't the phone use the ring tone I chose?

By default, ZIP3 phones are configured to use distinctive ringing so users may differentiate between an internal and an external call. A side effect of that is that the Common Ring Tone option available from the Telephone UI will not have any impact on the ring tone played when a call is received.

This setting can be changed by your system administrator. This is usually set the same way for all phones for a consistent experience.

Does Zultys support Quality of Service (QoS), Power over Ethernet (PoE), VLANs, and LLDP?

Yes, we support QoS ToS/Diffserv SIP DSCP and RTP DSCP.

Yes, we support PoE 802.3af (low power). Works with but does not require PoE+.

Yes, we support VLAN Class of Service (CoS) per port.

Yes, we support LLDP.

What is the format of audio files to upload to Auto Attendants and Call Groups?

Auto Attendants, Call Groups, Music on Hold: 8KHz, 8 bit mono, CCITT u-Law wav format

Voice Mail Greetings ZAC version 7: any wav or mp3 format

Voice Mail Greetings MXIE: 8KHZ 16 bit, mono, PCM encoded wav format

If I set my iPhone to DND (Do not disturb) will the Zultys Mobile client still work including ringing for incoming calls?


How do I transfer and conference calls from the physical phone?

Transfer – Blind: [Transfer] [Number] [Transfer]

Transfer – Supervised: [Transfer] [Number] [Send], announce call, [Transfer]. To cancel transfer, press [X] then press flashing line key to retrieve original call

Conference – Phone-based 3 Party conference – Press [Conference] while on call, enter number then press [Send], wait until call is answered then press [Conference]

Can I test my network to see if it is ready for a Zultys phone system?

Yes. Here are a couple of good network tests you can run yourself.

  1. General network test which works in any web browser: http://www.dslreports.com
    1. Poor grades such as D or F on Quality, Bufferbloat or Overall are indicators of possible issues and should be investigated for improvement.
  2. Zultys test: http://myspeed.zultys.com
What network equipment is recommended for customer sites?

Zultys is generally agnostic regarding brands and models of switches and routers.

  • We do recommend switches that provide Power over Ethernet (PoE) as it simplifies cabling and makes it easy to deploy a UPS (Uninterruptible Power Supply). All of our phones support the 802.3af standard for PoE. PoE+ also works but is not required.We can suggest what to avoid.
  • Avoid consumer-class / home-class routers with built-in WiFi unless it is for very small installations, as these often don’t have full control of all functions like disabling SIP inspection / ALG / SIP Fixup, etc. Enterprise class network equipment will provide the ability to control these are other features such as VLAN, QoS, LLDP, etc.Firewalls/Routers. Note:Zultys generally does not guarantee or support network equipment. These are suggestions and settings that our users have found helpful.
  • Edgewater Networks. https://edgewaternetworks.com/Firewalls/Routers – Known issues with suggested fixes
  • Cable Modem Internet Service Providers
    • Comcast. It is difficult to get Comcast to turn off ALG. The best solution is to get a local router that you can turn OFF ALG and have Comcast set their cable modem to “Bridge Mode” or “Pass through Mode” which will turn off ALG. Your local router will provide protection to your network. See notes below for disabling ALG.
    • Alternatively, many providers will let you buy your own cable modem and firewall/router where you can control all the settings including ALG.
    • AT&T UVerse. They can turn off ALG but it will take persistence to the right person at AT&T UVerse support to do it. Alternatively, they are able to set their device to “Bridge Mode”. Your local router will provide protection to your network. See notes below for disabling ALG.
  • Fortinet/FortiGate SIP ALG is turned on by default which causes problems.

In Fortinet GUI under dashboard there is a CLI prompt. Enter these commands:

  • config system settings
  • set sip-helper disable
  • set sip-nat-trace disable
  • set default-voip-alg-mode kernel-helper-based (If you see error here – ignore it)
  • end (Brings you back to main login)
  • config system session-helper
  • show (You need to find the entry for SIP, usually 13, but can vary)
  • delete 13 (Or the number that you identified from the previous command)
  • end (Brings you back to main login)
  • config voip profile
  • edit default
  • config sip
  • set rtp disable
  • end
  • end (Brings you back to main login)
  • Reboot firewall
  • Set Inspection Mode to “Flow-Based” it is “Proxy” by default.Fortinet-GUI-image002

There might be other settings that you need to configure depending on the FortiOS version that you are using. If you continue encountering issues related to SIP ALG, please contact Fortinet Support

  • Belkin SIP ALG is turned on by default and must be turned off
  • MicroTik http://support.clouditsp.com/index.php?/Knowledgebase/Article/View/78/0/how-to-disable-sip-alg-on-a-mikrotik
  • SonicWall: Set Consistent NAT on, turn off SIP ALG/SIP Transformation
  • Cisco ASA:
    • policy-map global_policy
    • class inspection_default
    • no inspect sip
  • Netgear: http://www.netgear.com Specifically the FVS318G2 firmware version 4.x supports disabling SIP ALG
  • Netgear (other) SIP ALG is turned on by default and must be turned off