iSIP™ (formerly SIPPhone) is a mobile internet service that enables you make calls using your iPhone's WiFi connection. You download iSIP from the AppStore. Once configured for the OnSIP you will be able to dial extension to extension calls within your PBX as well as make calls to the PSTN all over your cell phone's WIFI/3G connection without incurring cell phone minute charges.

Setup iSIP for OnSIP

Step 1

Download iSIP from the Apple App Store.

Step 2

Within the iSIP interface choose "Accounts". Choose "Edit" from the top and then tap the "plus sign" next to "Add new SIP..."

Choose "Other Provider"

Step 3

Display Name - Outbound Caller ID Name Field

Domain - Your the Proxy/Domain field

User name - Your Username

Password - Your SIP password

Advanced Settings

Auth username - Your Auth Username

Proxy Server - sip.onsip.com

Registration Timeout - 600

Voicemail Number - blank

Enable NAT Detect = off 

If you have the following username information:

You would enter the following information into iSIP:

Display Name - Hiro

Domain - example.onsip.com

User name - hiro

Password - VPG3hockrifv

Advanced Settings

Auth Username - example_hiro

Proxy Server - sip.onsip.com

Registration Timeout - 600

Voicemail Number - blank

Enable NAT Detect - off

Choose "SIP Account" from the <strong"Advanced Setting"" screen.
Choose "Save"

If you are successful, you'll see a your display name and SIP address show up in green under "SIP Accounts".

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