Firewall / Network Changes Required

To ensure the highest quality calls on celito's hosted voice system, and to prevent issues like dropped calls or one-way audio, a few changes must be made on your firewall.

These changes will need to be in place prior to the scheduled delivery of the phones. Failing to make these changes can result in call quality issues to include one-way audio, dropped calls and/or the phones not working at all. If your IT provider is unable to make the necessary changes, celito may be able to assist. We provide consulting services and can provide a quote at your request. Please email project@celito.net for additional information.

While celito does not officially support or manage SonicWall firewalls, we do have a number of clients that have gotten them working by making the following changes (in addition to the changes above).

The following firewall settings are optional and may not be required for your setup. If you are switching to celito from another VoIP provider, making these changes prior to switching to celito voice may cause problems with your current setup.

In order to prevent call quality issues to include dropped calls we suggest setting up voice prioritization on your firewall. You can also dedicate part of your internet connection to your voice traffic which also helps with call quality. See the VLAN for additional details.

Setting up a VLAN in your network is not necessary to use the phones, but doing so will separate your voice traffic from your computer traffic which can help prevent audio quality issues. If you have configured a voice VLAN in your network then you must provide the VLAN details to celito so that we can add the configuration to your phones. The following configuration options are available; please let celito know which option you're using:

• Enable the following option on your DHCP server:

  DHCP Option	Value (String)	Description

  128

  http://ndp1-rdu.celitovoice.net/cfg

  This is not be required if the phone was purchased from celito. Automatically points a Yealink phone to celito for provisioning.

• Enable the following option on your DHCP server:

  DHCP Option	Value (String)	Description

  160

  http://ndp1-rdu.celitovoice.net/cfg

  Automatically points a Polycom phone to celito for provisioning

• Enable the following option on your DHCP server:

  DHCP Option	Value (String)	Description

  066

  http://ndp1-rdu.celitovoice.net/cfg/spa$MA.cfg

  Automatically points a Cisco/Linksys SPA to celito for provisioning

These changes must be made on the modem provided by your internet provider, as well as on your router or firewall. Depending on your setup you may have only one device, or you may have both. It may be necessary to call Time Warner/AT&T/etc. to have it disabled on the modem itself.