Nokia N80 Internet Edition: VoIP FAQ

FAQ

When inquiring about a problem related to Nokia N80 Internet Edition or VoIP, please describe the problem in detail. Include all the relevant information that you have available of the problem situation, details of the system (for example, what equipment and software build is in use), and any other relevant information (for example, log writings and message monitoring). Also, describe the corrective measures that you have carried out after the problem occurred. All data may be valuable.

Table of contents

• How are settings obtained for the N80 Internet Edition VoIP client?
• Is it possible to get the settings automatically?
• How can it be determined which network elements work with the Nokia N80 Internet Edition?
• Is there any setting information available for different networks?
• Do any settings need to be changed after provisioning?
• How are the SIP and VoIP client settings linked together?
• Should automatic or manual registration be used?
• Could the current phone-book content be used to make a VoIP call?
• Is it possible to provision different WLAN access points?
• Is it possible to provision multiple SIP/VoIP settings from multiple service providers, for example, corporate intranet’s and commercial VoIP service for private use?
• Is it possible to use multiple SIP/VoIP accounts mentioned above at the same time?
• Is it possible to use multiple user accounts for the same service provider (for example, family members)?
• Is it possible to configure the used and preferred speech codecs?
• Is it possible to configure the SIP registration expiration time?
• Is there a WLAN/IP status page available in the Nokia N80 Internet Edition?
• Is there a SIP status page available in the Nokia N80 Internet Edition?
• Is it possible to make an Internet call without a SIM card?
• Why is there no ring tone when receiving an incoming VoIP call without a SIM card?
• Is it possible to change the default ring tone in an offline profile?
• Is it possible to dial numbers including * and/or #?
• Is it possible to change the codec order of the SIP settings?
• How is the STUN server address configured?
• Is there any difference in VoIP call and GSM call numbers?
• Why does the editor of the number entry only allow characters when establishing a second call while holding another?
• Why is there no busy tone when the opposite user disconnects the established call?
• Is there any specific form that should be used to enter numbers in the phone book?
• How is TEL URI supported?
• How is the emergency call (for example, 112 or 911) selection, GSM or VoIP, made?
• Why is there this kind of logic for emergency calls in dual-mode devices?
• Is it possible to reject an incoming call from a specific number automatically?
• Can a number on the missed calls list be automatically removed when it has been stored on the redial list?
• What happens if the Nokia N80 Internet Edition leaves the coverage of the access point for a short period of time?
• Why does the Nokia N80 Internet Edition fail registration after receiving a “200 OK” response from the registrar?
• Why are several settings (such as call waiting, caller ID) double within the call settings menu item?
• Is it possible to make a conference call in VoIP mode?
• Is it possible to give a different user name for multiple SIP profiles in each realm?
• Is it possible to connect to WLAN without a SIM card?
• To establish another call during an active call, can I stop dialing by pressing the hang-up button and again activate the held call?

• How are settings obtained for the N80 Internet Edition VoIP client?

• Settings need to be modified to match the voice-over-IP (VoIP) service provider’s network.

  Service providers are strongly advised to deliver the settings either over the air using the Open Mobile Alliance (OMA) Device Management (DM) facility supported by the Nokia N80 Internet Edition or by using a settings wizard implemented as a plug-in module for the VoIP log-in application.

  Please refer to the document Nokia S60 VoIP Implementation Configuration Tutorial.

• Is it possible to get the settings automatically?

• The Nokia N80 Internet Edition supports OMA device management and automatic provisioning. Please refer to the document Nokia S60 VoIP Implementation Configuration Tutorial.

• How can it be determined which network elements work with the Nokia N80 Internet Edition?

• The only way to know interoperability is to test the whole system end to end. Even when the Nokia N80 Internet Edition is known to be fully interoperable with a certain SIP proxy, one single configuration change or WLAN access router or a firewall on the route can break it. On the other hand, any nonlisted equipment may work.

  Nokia will publish a list of vendors it is conducting tests with, and any specific product interoperability can be checked from the voice-over-IP (VoIP) support.

• Is there any setting information available for different networks?

• Network providers will publish their settings or preferably provide the over-the-air (OTA) settings automatically.

• Do any settings need to be changed after provisioning?

• All settings (SIP, VoIP) can and should be provisioned to increase usability and avoid human errors.

• How are the SIP and VoIP client settings linked together?

• The SIP setting or settings are selected for a certain voice-over-IP (VoIP) profile inside the VoIP settings.

• Should automatic or manual registration be used?

• To be reachable via voice over IP (VoIP) whenever under the WLAN coverage, the "Always on" setting is preferred. On the other hand, manual registration is more convenient when you need an occasional or a temporary VoIP connection.

  If automatic registration is used, the SIP client is also changed to automatical registration.

• Could the current phone-book content be used to make a VoIP call?

• Yes, assuming the service provider uses the existing normal phone numbers as the SIP user name. The voice-over-IP (VoIP) client will add the default SIP domain automatically.

  For frequently used VoIP contacts, and if they are on another SIP domain (that is, under another VoIP service provider), the SIP address should be added to the phone book. This can be done the same way as with normal cellular calls on the received-calls log.

• Is it possible to provision different WLAN access points?

• Yes.

• Is it possible to provision multiple SIP/VoIP settings from multiple service providers, for example, corporate intranet’s and commercial VoIP service for private use?

• Yes.

• Is it possible to use multiple SIP/VoIP accounts mentioned above at the same time?

• Yes, assuming there is an IP route to both of them from the same WLAN access point.

• Is it possible to use multiple user accounts for the same service provider (for example, family members)?

• Unfortunately not.

• Is it possible to configure the used and preferred speech codecs?

• Yes.

• Is it possible to configure the SIP registration expiration time?

• Unfortunately not in the current software release. The registrar can shorten the expiration time, if needed. A WLAN client can be detected based on the User-Agent header.

• Is there a WLAN/IP status page available in the Nokia N80 Internet Edition?

• Unfortunately not in the current software release.

• Is there a SIP status page available in the Nokia N80 Internet Edition?

• Unfortunately not in the current software release.

• Is it possible to make an Internet call without a SIM card?

• Yes, if you have a registered SIP account. The over-the-air (OTA) and plug-in provisioning will set the Internet call as the default, and the terminal changes automatically to Internet calls if no subscriber identity module (SIM) card is inserted.

• Why is there no ring tone when receiving an incoming VoIP call without a SIM card?

• When the terminal is used without a subscriber identity module (SIM) card, the terminal will always use an offline profile. In the offline profile, the ring tone is "none" by default.

• Is it possible to change the default ring tone in an offline profile?

• It can be changed manually via Menu -> Tools -> Profiles -> off-line -> edit -> Ringing Tone. In offline profile the ring tone can be changed only manually, not via provisioning.

• Is it possible to dial numbers including * and/or #?

• Unfortunately not in the current software release.

  There can be * characters in the dial string, so a call via certain SIP broker services works, but unfortunately # character is not allowed.

  Certain dial string combinations starting and ending with * and/or ending with * or # are reserved for the GSM call control and thus they can not be used with VoIP (for example, *21#).

• Is it possible to change the codec order of the SIP settings?

• The codec order can be provisioned. You cannot edit the order yourself.

• How is the STUN server address configured?

• The STUN server address, either an FQDN or a direct numeric IP address, can be defined with provisioning. If not provisioned, the VoIP client will try to resolve the address with a DNS SRV query. The query is expanded from the SIP domain, that is, the hostname part of the user’s SIP URI as specified in RFC 2782 and draft-ietf-behave-rfc3489bis-04.

  For example, if the configured SIP URI is sip:john.doe@my.voip.provider.com, the DNS SRV query will be performed to _stun._udp.my.voip.provider.com

• Is there any difference in VoIP call and GSM call numbers?

• No. If a call is established using a SIP account, it can be stored on the call list with the domain, if so required. Remove the domain suffix in establishing a GSM call.

• Why does the editor of the number entry only allow characters when establishing a second call while holding another?

• A selection has been made between numbers and characters as the default method. You can change to number mode by using a long press function. If the number is in the phone book, calling is easier.

• Why is there no busy tone when the opposite user disconnects the established call?

• The Nokia N80 Internet Edition moves to null state immediately. All Nokia mobile devices work in a similar way.

• Is there any specific form that should be used to enter numbers in the phone book?

• Phone numbers in Nokia N80 Internet Edition can be entered with or without the country code. Nokia N80 Internet Edition takes the number from contacts and adds the set domain , ie. sip:0400123456@some.domain will be used.

  The form may make a difference in SIP proxy, this depends on the service provider. If there is no number analysis for the SIP URI, the same number with and without country code is considered different. For example: sip:0400123456@some.domain and sip:+358400123456@some.domain may be different in some service operator's network.

• How is TEL URI supported?

• If the user initiates a call by keying in a TEL URI in Contacts, the call is established using the TEL URI.

  If a TEL URI is selected in the browser, the phone will ask for a voice, video, or Internet call. If the Internet call is selected, the call is initiated with a SIP URI using a number in the TEL URI.

  An incoming call with a TEL URI is shown in the UI and Logs. Using a TEL URI in the Logs will initiate a call using a TEL URI.

• How is the emergency call (for example, 112 or 911) selection, GSM or VoIP, made?

• In dual mode handsets with Nokia VoIP framework capability, an emergency call is always tried first as a cellular (GSM/WCDMA, that is, circuit switched) call if cellular coverage is available. The cellular emergency call recognition and procedure are done as specified for cellular emergency calls.

  Only if cellular coverage is not available for a circuit-switched emergency call, the dual mode terminal will try to make the emergency call as a WLAN VoIP call.

• Why is there this kind of logic for emergency calls in dual-mode devices?

• The existing GSM technology is mature for such a critical service as the emergency call. The mobile VoIP emergency calling has still some unsolved technical issues and has not been widely deployed. There are also technical differences in the support for mobile emergency calls between the VoIP service providers.

  As a device manufacturer, Nokia wants to maximize the reachability for emergency call services. When the mobile VoIP emergency standardization, regulation, deployments, and networks evolve and stabilize, the current dual mode handset logic is assumed to be updated in accordance with them.

• Is it possible to reject an incoming call from a specific number automatically?

• Unfortunately not. Call barring can only be done by the network.

• Can a number on the missed calls list be automatically removed when it has been stored on the redial list?

• No. Missed, received, and dialed calls are separate logs of call history. This same UI concept is used for all Nokia mobile devices.

• What happens if the Nokia N80 Internet Edition leaves the coverage of the access point for a short period of time?

• If the registration is in manual mode, all connections, WLAN and SIP, will be disconnected. In automatic mode, the Nokia N80 Internet Edition registers back to the SIP account when the WLAN coverage is again reached.

• Why does the Nokia N80 Internet Edition fail registration after receiving a “200 OK” response from the registrar?

• A common reason for a registration failure is that the registrar or, for example, the SIP application layer gateway (SIP-ALG) on the route modifies the Contact URI of the response.

  If the Contact URI does not match the original value in the REGISTER request, that is, if it is modified, the Nokia N80 Internet Edition checks if the hostname part matches the address in the received parameter of the Via header and the rport value. If these do not match, or if any URI parameter, such as transport=UDP, is removed or changed, the registration is treated as failed.

  According to Nokia’s interpretation of the SIP RFC 3261, the registrar shall not modify the Contact URI sent in the response to the register request. When forwarding a request, for example, INVITE, some SIP servers write their own address to the Contact URI, instead of correctly inserting a Record-Route header. This also works with the Nokia N80 Internet Edition, but as for the REGISTER request the Contact has a different meaning and should not be touched.

• Why are several settings (such as call waiting, caller ID) double within the call settings menu item?

• There have been conflicting opinions about how features available in both GSM and voice-over-IP (VoIP) technologies should be implemented. Nokia will study the issue to see if those settings could somehow be combined in the future.

• Is it possible to make a conference call in VoIP mode?

• Unfortunately not in the current software release, but a swap between two calls is possible.

• Is it possible to give a different user name for multiple SIP profiles in each realm?

• No, each realm can have several profiles but the user name must be the same in all of them.

• Is it possible to connect to WLAN without a SIM card?

• Yes. When you use a terminal without a subscriber identity module (SIM) card, an offline profile is in use. With this profile, the terminal can be used in places where GSM phones are not allowed, such as airplanes. The WLAN connection might not be allowed in those circumstances either, and therefore you will be requested to confirm the creation of a WLAN connection in offline mode.

• To establish another call during an active call, can I stop dialing by pressing the hang-up button and again activate the held call?

• No. When the hang-up button is pressed, the held call is disconnected. To clear the screen, use the "C" button. All Nokia mobile devices work in a similar way.

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