Asterisk draining batteries on wireless SIP phone?

[colinjones]

Has anybody any experience with this type of scenario? I have a wireless SIP phone that I am using as an extension with LMCE -it is supposed to have at least a 60hr standby life. The phone is brand new and seems fine in every other way, including talk time! It works fantastically with LMCE and we are using it as a normal cordless phone around the house (even works down the back yard!)

But if I take it off charge in the morning, it is often almost flat by the evening, and definitely dead by the next morning, which makes it a bit useless. When troubleshooting the SIP side of things I noticed just how much chatting Asterisk and the phone do whilst nothing is going on. I'm just wondering (as talk time seems reasonable) if Asterisk is insisting on talking a lot which drains the batteries... this would be fine for a non-battery device, but not here. Is there anything I can do to tune this?

[hari]

i'd assume your access point does not have power management enabled.

best regards,
Hari

[colinjones]

So you are saying that this is something happening at the AP, layer 2-ish level rather than at the SIP/session layer? I have looked through my AP's config and can't see anything related to power management... it is a high end Billion router, would you expect it to have those features??

[hari]

the better access points should all support power management. With WiFi, the AP has to do some things to make PM work. It has to queue the pakets for a client until it wakes up. Earlier APs did not get that right.

It could also be your phone. I've played a bit with the E60/61 and N95 from Nokia. Without power management enabled on the phone, it is empty after the day. Enable it and those phones can run for days in standby, registered to asterisk.

best regards,
Hari

[colinjones]

Hari - this phone isn't a mobile phone, it is a dedicated wifi SIP phone, nothing else, so it is already in whatever mode it needs to be to achieve its 60hr standby spec. But still can't find anything for the AP. But I did buy I new AP today explicitly for the phone, so will check into it for PM features tomorrow. Thanks for the pointers!

Col