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iSip Support:


    (1) This version fixes start up issue in iPod version 3.1.1 or above
    (2) Supports default '+' as international prefix, but if you sip provider does not support it, set it to 00 or 011 in settins page
    (3) Fixes the problem to input some characters in accounts settings

    Note: Version 3.0 or above supports Apple's push notification service. You should be able to receive notification message if your sip server can be connected by our push server. With some sip servers, we can actually transfer the incoming call to iSip if you are in a wifi zone, for others, you can see the notification message about incoming call's number or caller id.

    After installation, you will see the icon of 'iSip' on your IPhone screen as following:

    iPhone Screen


    Tap the icon to launch it. The screen you see after the very first launch:




    If the device is iTouch,it should be the follow screen:



    Notice the 'Cellular' button shows green letters and the 'SIP' button shows the white letters. It means you are now ready to make a cellular call (same as you make a phone call through your iphone's dialing interface), but not a SIP call (utilizing the VOIP) yet. You need to add a SIP account first.

    3. How to active iSip account? And how to add other VOIP/SIP account?

    a. How to active iSip account?

    Tap 'Accounts' icon at the bottom to enter 'Account Manager' page:


    add_account step 1


    If you tap 'Edit', you will see the following picture:


    add_account step 2


    Please tap 'Add new SIP account', you will enter 'SIP Provider' page:


    add_account step 3

    If your sip provider exists in the sip provider list, directly tap it and input your sip username and password,

    if you register the account successfully and enable APNS, you will see:


    add_account step 4


    If you turn the account to OFF, you will see the following picture:


    add_account step 5


    If you want to set the ringtone for your account, please tap 'Edit' on Account page and tap your account,

    you will enter SIP Accounts page, please tap 'Ringtone' to set the ringtone, you will see the following Ringtone page


    add_account step 6


    If you enable your account, you will see the following picture on the 'Dialer' page.


    add_account step 7



    add_account step 8


    b. How to add Other VOIP/SIP account?

    Tap 'Accounts' icon at the bottom to enter 'Account Manager' page:


    add_account step 9


    If you tap 'Edit', you will see the following picture:


    add_other account step 1


    Please tap 'Add new SIP account', you will enter 'SIP Provider' page

    add_other account step 2


    Tap 'Custom SIP Provider' to get to SIP Accounts page


    add_other account step 3


    Please input your sip account information which are provided by your SIP service provider as demonstrated

    <空>add other account step 4


    Note: If your sip provider only supports TLS, please choose TLS in the SIP Transport item.


    If you want to set more information, you can tap 'Advance' to continue:


    add other account step 5


    Tap 'Ringtone' to set the ringtone for your isip account:

    add other account step 6


    And if you want to register the account effortlessly, you can select the SIP Provider from Supported SIP Provider. For example:


    The information (username and password) should come from your Sip Provider. Please input username and password, and tap the 'Next' button, you will see 'Enable APNS', If register the account successfully, it will bring you to the 'Account Manager' page:


    add other account step 7


    add other account step 8


    add other account step 9


    add other account step 10


    Now tap the 'Dialer' icon at the bottom, you will see the following pictures:


    add other account step 11


    add other account step 12

To make a SIP call, just key in the number and push the 'SIP' button. When the call is connected, it shows this screen:

call connected


When you get an incoming SIP call, you see the following screen besides hearing the ring. Tap 'Answer' to accept the call or 'Decline' to reject:

incoming call

You can create as many as 8 accouts. The first account (default account) in the list is used for outgoing calls. You can set any of your accounts to be the default account by dragging it to the first row in the 'Account Manager' page.
You can use any Voice-Over-IP providers out there that supports SIP. There are many SIP providers offering very reliable VOIP service with competative rates. As an example, you can try these:

Tap the 'Recents' icon at the bottom brings you the 'Recent Calls' page. The green icons are for the outgoing calls you've made and the bule ones are the incoming calls.


Call from Recents


You dial the number,for example,you will get to the page as following.You can dial the number directly by tapping on 'call' button or tap on the button 'Add to Addressbook' to add the number to your addressbook.



Tap the 'Contacts' icon at the bottom brings you the 'Contacts' page showing all the contacts you've stored in your IPhone Contacts. Tap on a contact brings you to the following page showing the contact details. On this page, You can call this contact by tapping the number.


Call from Contacts

    Tap the 'Setings' icon at the bottom brings you to the 'Settings' page:






    SIP Stun and SIP Stun Server: If your iSip is behind a NAT/Firewall and your Sip Provider does not do RTP proxy, you'll likely need a stun server so that your voice traffic can go through the NAT.

    CODEC: See answer to question 11

    Outbound Proxy: If you want iSip to make SIP calls through a proxy, set it here. the format is like this: "sip-proxy-domain-or-ip:port". You do not have to specify the ':port' portion if your proxy uses the default sip port 5060.

    RTP Port: Tell iSip your local RTP port preference. For example, if setting it to 12000, the local RTP port used by iSip in any SIP call will always be greater than 12000.

    VAD: VAD = Voice Activity Detection.RTP Silence Suppression Endpoints sending audio as an RTP stream are not required to send packets during silent periods. The capability to stop sending RTP packets during silent periods is known as "Silence Suppression" or VAD (Voice Activity Detection). Whether to use Silence Suppression is usually a configuration option on endpoints. When processing a stream of RTP packets, here is what RFC 3389 has to say about detecting Silence Suppression: RTP allows discontinuous transmission (silence suppression) on any audio payload format. The receiver can detect silence suppression on the first packet received after the silence by observing that the RTP timestamp is not contiguous with the end of the interval covered by the previous packet even though the RTP sequence number has incremented only by one. The RTP marker bit is also normally set on such a packet.

    RFC3605 Support:disable this to compatiable with legancy sip server.The Session Description Protocol (SDP) is used to describe the parameters of media streams used in multimedia sessions. When a session requires multiple ports, SDP assumes that these ports have consecutive numbers. However, when the session crosses a network address translation device that also uses port mapping, the ordering of ports can be destroyed by the translation. To handle this, we propose an extension attribute to SDP.

    Tap 'Play' button, It will list the audio you record during calling.you can select them to check.Look at the following page:


    Prefix for Contacts: you can specify a 'prefix-number' so when you make a call directly from one of your stored contacts, iSip will automatically add the 'prefix-number' to the stored number when dialing

    Tap 'Deault Ringtone' ,you will get to the following pag,and set a default ringingtone for the new created sip account.



    Tap 'Mic Volume',you can setup the Mic volume. The page as follow:


    Dial Setting:You can enable or disnable Cellular Dialer .But if the device you use is iTouch,it doesnot have this function.For example,if you disable it,you will see the 'Cellular' button is disnable.the page as follow:


    Tap 'Reset',you can go to the following page to reset:


    Reset Account:If you tap it,It will delete all sip accounts. And the sip accounts will be same as default.
    Reset Setting:If you tap it,the setting will be same as default.
    Reset Factory:If you tap this, It will delete all sip accounts and the setting will be same as default.
    If you tap 'RInging Mode',you will see the following page:



    You can enable or disable the ring or vibrate when there is an incoming call. But if you are using a iTouch,it should show you the following page:



    Tap 'Background Photo', you can select image for the background,and you will see the following page:



    You can select image for System and Library.For example,we select image from System.We tap 'System Photo',and the following page will appear:


    Tap an image which you like,and you will see the following page:


    Tap 'set' Button ,you will set it as a background photo successlly.And if you are dialing a call,you will see the image,for example:


Most cases you won't need to setup the stun server. But if you do, you can set it up via the settings page. Enable the 'Stun Server' settting and also specify the domain name/ip of the stun server. You need to restart the iSip application to let the setting take effect.

    Most cases you don't need a SIP proxy for your SIP calls. But sometime the network environment you are in may require your SIP calls to go through a SIP proxy. To set it up, you can either add the proxy information through the 'Account Manager' to whichever account that requires a proxy, or you can set it up through the 'Settings' page which applies to all accounts.

    They serve the same purpose as explained in the last question. The difference is, the proxy setting in the 'Account Editing' page applies only to that particular account, while the 'outbound proxy' in 'Settings' page applies to all the accounts.

    In a word, only when all of your accounts require the same proxy, you need to set the 'outbound proxy' in 'Settings' page. For all the rest scenarios, you should leave it empty.

    G.711 U-Law, G.711 A-Law, GSM

    We are commited to provide the best technical support to our customers. If you are a paid customer, you can submit a ticket at here. We'll get back to you within a 48 hour timeframe. Please provide as much information as you can so we can narrow down the problem of your issue faster.

    If you are a VOIP/SIP provider wish to distribute iSip to your customer, please contact us at sales@vnet-corp.com. We have volume license available and we can also customize our product for your specific needs.

    When you are offline,you can also know the calls by push notification service.You should be able to receive notification message if your sip server can be connected by our push server. With some sip servers, we can actually transfer the incoming call to iSip if you are in a wifi zone, for others, you can see the notification message about incoming call's number or caller id.
    First,Tap the 'Accounts' icon at the bottom to get to 'Account Manager' page:

    Second,tap your account and you will get the page blow:

    Turn it to "on",then it will remind you of your calls even if you are offline.

    From version 4.4, we added prefix for each account, this prefix in the account only applys to call start from address book. The prefix in setting will be applied to all calls, but the prefix in setting one will only work when the one in account has not been set.

More Support

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