iDEN Simplex

bellersley · Post by **bellersley** » Thu Jun 29, 2006 10:47 am

So, i've read a few threads on here about iDEN sets doing simplex. I have an i760 and it does this no problem, as well as an r750+. I'm wondering If anyone knows what frequency they work on. There are some 10 or so channels and 10 codes.

thebigphish · Post by **thebigphish** » Thu Jun 29, 2006 11:43 am

the 'off network' capable phones do indeed do simplex modes, however they are up in the 800 cell range (when i throw my 760 into cell trace mode - i get a 857.5375 freq, when i go off network and put it into trace i get no mention of what freq.) The freqs that they probably use are the same as they use on the network, as i see it.

bellersley · Post by **bellersley** » Thu Jun 29, 2006 12:22 pm

I tried using a frequency counter in talk around, but it's having difficulty locking. My guess is that it is using a pre-determined time slot. The only thing I can think of trying is keying down and use a scanner and see what happens...

bellersley · Post by **bellersley** » Thu Jun 29, 2006 12:24 pm

Also... is there a way to turn off that damn talk-permit-tone?!

Josh · Post by **Josh** » Thu Jun 29, 2006 12:27 pm

900MHz ISM.... ie, license free 900Mhz Digital Spread Spectrum, frequency hopping, etc etc etc.

Not monitorable, it's more or less like any 900Mhz DSS cordless phone, well... the same frequencies anyhow. Monitorable? NO.

-Josh

AEC · Post by **AEC** » Thu Jun 29, 2006 1:01 pm

As the Phish states, the off-network options are in the SMR band the phones operate in, I doubt they have dual PA/receivers for this option as the cost would be more than the resale of the phone to offer T/A on 900 ISM.

But like any system such as iDEN or 'regular' cell service, it also depends on the air interface.

iDEN operates using TDMA, so each 'call' would be placed ain a time slot queue according to priority and heirarchy, then moved up or down in that slot according to it's priority in that queue.

Inactive time slots are reallocated so there should be little trouble in multiple users, but I don't have access to the off-network phones yet, my i530/i205 and i415 don't allow this, but I also don't have the cable to program these phones yet.

The RSS is available from Circle-M freely(imagine that will ya) and can be downloaded at their iDEN site.

Don't bother looking for model specific cables, they always appear to be 'out of stock' every time I check, so I wonder about their support of models not being made any longer, or ones that are not big movers as well.

I prefer to wait and pick up last year's models, that way, I get almost current generation models that are a lot less in price than when new.

I wonder if these off-network capable phones utilize a form of range detection to 'know' if a specific subscriber is within range of your handset, it would make sense, since it's off-network, it should not have the means to be polled by the tower site, and probably works in conjunction with the SIM card for ID purposes and access.

The biggest problem I have with Nextel, is the fact you have no options to block specific numbers from(dare I say this) 'chirping' you, you get to receive them all, like it or not....Another failure of the way the system is set up.

ID blocking would be a great feature to have as 'standard' to prevent lids from keying your number and wasting your money when you have no idea who it is that's 'calling' you.

*Sorry, wrong number*...DOH!

bellersley · Post by **bellersley** » Thu Jun 29, 2006 3:28 pm

If you try to key up on talk around with nobody on your channel and code, you will get an out of range bonk. A nifty feature is the ability to go into a recieve all mode, allowing you to recieve all codes on your channel, but no TX.

bellersley · Post by **bellersley** » Thu Jun 29, 2006 3:32 pm

As well, you can enter into private mode, where by you can only talk to, and hear from, a specific user. Also, when in regular talk around mode when someone transmits that is in your contact list, it displays their info.

bellersley · Post by **bellersley** » Thu Jun 29, 2006 3:37 pm

I can easily see talk around being 900 ISM..the radios are all capable of both 800 and 900. Now If only i could type more than a few lines in a text box... i'm using my 760 to type this... sorry for all the posts!

AEC · Post by **AEC** » Thu Jun 29, 2006 5:02 pm

bellersley wrote:I can easily see talk around being 900 ISM..the radios are all capable of both 800 and 900. Now If only i could type more than a few lines in a text box... i'm using my 760 to type this... sorry for all the posts!

I guess I'll have to buy one and play with it....Good to know it has 'capabilities' already.

Too bad the RF section is so tightly embedded with the control logic as to make usage outside of the phone all but impossible.

I'd like to be able to use a few of those as a link setup...short range, and bypass the SIM card as well with a rewrite of the firmware*laughing*.

Thanks for the info, it was much appreciated!

bellersley · Post by **bellersley** » Thu Jun 29, 2006 5:14 pm

A friend has an r750+ that isn't active on a system... I'll have to see what happens If you try to use talk around... in theory it should work...

OX · Post by OX » Fri Jun 30, 2006 12:05 pm

So you can download the iDen RSS from Motorola's Iden page? I can download the Standard apps utility, the GPS upgrade utility, the phonebook manager and media manager software, but not the RSS. I've seen the RSS floating around but there is nothing that allows you to do any programming like a radio. It is mostly options and system information and the RSS is definitely not freeware.

redbeard · Post by **redbeard** » Fri Jun 30, 2006 3:22 pm

AEC wrote:The RSS is available from Circle-M freely(imagine that will ya) and can be downloaded at their iDEN site.

Links please?

AEC, just wanted to mention I saw you on HoFo while browsing the other day. I guess you are a phone geek as well as a Moto geek

The stuff people are tossing around on the 'net is similar to the stuff we have with the 2 way RSS. It's really CPS, as it's Windows and not DOS. The standard version is called 'Super Agent', the next up is 'Carrier RSS', and the Almighty version is known as 'Depot RSS'. There is also some hack programs like WebJAL and LabJAL, and also I think something called Raptor now.

There are a lot of hacks out there for Nextels, and most of it involves codeplug editing.

Its funny that we all know about Depot RSS and codeplug hacking, but that a bunch of script kiddies are doing it too and haven't made the connection to the radio side of it all. Parallel universes I guess... LOL

mikegilbert · Post by **mikegilbert** » Fri Jun 30, 2006 4:32 pm

redbeard wrote:The RSS is available from Circle-M Its funny that we all know about Depot RSS and codeplug hacking, but that a bunch of script kiddies are doing it too and haven't made the connection to the radio side of it all. Parallel universes I guess... LOL

Damn it, I should have gone to ITT Tech haha. Seriously though, it's amazing that those guys in Hong Kong [rumored to be the center of new model cell phone unlocking/hacking] can unlock a Newly released Sharp handset from Vodaphone. If only they'd shift their focus a little...

-Mike

AEC · Post by **AEC** » Fri Jun 30, 2006 5:13 pm

I can't remember what the actual string information on the RSS is, but the version for the Falcon series: i205, i530, i415 and the like is called:

Carrier RSS_18.zip

You can find links at idengods, howard forums, and many other sites as well....[search] in this category should turn up over 30 sites dedicated to iDEN phones, both new and old.