maemo.org - Talk - Few questions on Voip/SIP!

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Few questions on Voip/SIP!

Code:

[Profile]

DisplayName = SIP

IconName = general_sip

Manager = sofiasip

Protocol = sip

Priority = -10

VCardDefault = 1

VCardField = X-SIP

Capabilities = chat-p2p, voice-p2p, video-p2p

ConfigurationUI = osso-accounts

SupportsPresenceMessage = false

Default-cellular = true

Default-discover-binding = true

Default-loose-routing = false

Default-transport = auto

Default-keepalive-mechanism = auto

Default-keepalive-period = auto

Default-discover-stun = true



[KeepAlive]

ParamName = keepalive-interval

Value-WLAN_INFRA = 120

Value-GPRS = 600



[Presence available]

Name = pres_bd_sip_online

IconName = general_presence_online

Type = 2



[Presence offline]

Name = pres_bd_sip_offline

IconName = general_presence_offline

Type = 1



[Action chat]

Name = addr_bd_cont_starter_im_service_chat

IconName = general_sms

VCardFields = X-SIP

prop-org.freedesktop.Telepathy.Channel.ChannelType-s = org.freedesktop.Telepathy.Channel.Type.Text



[Action call]

Name = addr_bd_cont_starter_sip_out

IconName = general_sip

VCardFields = X-SIP,TEL

prop-org.freedesktop.Telepathy.Channel.ChannelType-s = org.freedesktop.Telepathy.Channel.Type.StreamedMedia

These are the parameters of the sip.profile found in /usr/share/osso-rtcom. The are few question I would like to ask the connoisseurs around the TMO. Those are being related to the keep-alive mechanism and keep alive period.
The first variable - keep alive mechanism - has 4 options in N900: Auto, Register, Options and Off.
As for the second variable - keep alive period - the values within the sip.profile parameters are 120 for wlan and 600 for gprs.

Thus said, my questions are:

1: What do these values stand for? (120, 600) and What does it mean?
2: If i increase or decrease these values, especially for the gprs, will it have an impact on the battery life?
3. What is the best option for the keep alive mechanism - choosing from the 4 options - in order to improve the battery life?
4. Did any of you tackle with this issue of voip/sip?

Please, take your time! No queueing!:p;):rolleyes:

Re: Few questions on Voip/SIP!

Quote:

1: What do these values stand for? (120, 600) and What does it mean?

Keepalive period, usually seconds; here for wifi or gsm.

Quote:

2: If i increase or decrease these values, especially for the gprs, will it have an impact on the battery life?

Yes, but also the connection could brake if you try values to high, there is a min/max value for your sip/voip provider. (My option could be 600 but is auto)

Quote:

3. What is the best option for the keep alive mechanism - choosing from the 4 options - in order to improve the battery life?

That depends on your provider again... not all providers support both options, I guess auto negotiates or takes register as a fall back if options does not work. (I guess Off and Auto are not considered a real option in this case. My option could be REGISTER but is Auto.)

Quote:

4. Did any of you tackle with this issue of voip/sip?

Nope, as batterylife did not increase noteably from SIP/VoIP but by turning off MSN and Skype!

Re: Few questions on Voip/SIP!

Although I don't fully understand the settings, all of the VoIP accounts I have set up have suggested using 'Auto' as the option for keep alive mechanism and keep alive period.

That said, if you are worried about battery usage (as I am!), you can just create a VoIP profile in 'My Availablity' that logs you into your accounts when you switch to it.

This means that you cannot receive or make any VoIP calls when you are not online, but it can be helpful as I don't usually receive inbound calls to any of my VoIP accounts.

Re: Few questions on Voip/SIP!

Quote:

Originally Posted by zaksloan (Post 982071)

Zaksloan,
Please provide more info regarding "a voip profile in My Availability"...

Re: Few questions on Voip/SIP!

Quote:

Originally Posted by gorgezilla (Post 982192)

Zaksloan,
Please provide more info regarding "a voip profile in My Availability"...

Go to 'Availability'.

Select 'New status'.

Give it a name. I call mine 'VoIP'.

It should list all of your SIP/VoIP/Skype accounts. I set the availablity of all of them to 'Online'.

Select 'Save', then you're done.

When I want to use VoIP/Skype etc, I just go to to 'Availability', then select the 'VoIP' option, then 'Save', and it logs me into all of my VoIP/SIP/Skype accounts.

When I'm done, I just select 'Offline'(which has all of them set to offline) and I'm no longer connected.

Feel free to ask if you require any more help.

Re: Few questions on Voip/SIP!

@ Zaksloan
Thanks, mate
Another question to you and for others is related to voip audio codecs.

Is there any voip codecs for 2G networks, thus enabling high compressions so a sip call to be properly done?

Re: Few questions on Voip/SIP!

Quote:

Originally Posted by gorgezilla (Post 982888)

@ Zaksloan

Is there any voip codecs for 2G networks, thus enabling high compressions so a sip call to be properly done?

Not totally sure, but I do know that the G729 codec is good over 3G. ILBC is another codec used, but I don't know how or when the N900 switches between them.

I had a go at testing and forcing different codecs in the codec .conf file, but that was over a year ago and I can't remember how to do it!

I got a new N900 in December and haven't played around with the codecs, but VoIP has been perfect for me, even over 3G, but I haven't tested it over 2G.