search for: 600ohm

I'm looking to add a single FXO port to my Asterisk box. It looks like my options are a Digium Wildcard X100P off eBay for $6.99, or a Wildcard TDM400P with an FXO Module from Digium for $125. Can anyone explain the tradeoffs (other than the ability to put 4 FXO/FSO modules on the TDM400P). What about RTC for the system - I know the TDM400P provides it. Does the X100P? Thanks!

...nversation to be played out to NICE recorder. I currently have a hack using an FXS for every seat. Using mixmonitor() to record calls, a while loop runs in the FXS' dialplan as soon as asterisk starts and play it out as soon as it sees it. and of course, some transformer hack to terminate the 600ohm FXS with a hi-Z recorder line. It hasn't been giving me much headaches except astribank crashes every now and then. about once a month. However, it got me thinking. There gotta be a neater and better way. Any suggestions? Cheers and Happy Holidays, -- Kelvin Chan Positronics Ent.

as my first project with *, i would like to replace our old neax2400(sds) with an * server. i've got an X100p and a TDM400 on hand already. for the CO lines, the X100p works ok with fxsks signaling though there are still strange things happening every now and again but more testing is on the way. my real big problem is the DID lines which our telcos call DDI lines; (incoming calls only) i

Hello. I am looking for details of the maximum allowed/usable/effective wire/cable length of the connection from a FXS port of Digium analog cards to the analog telephone handset. To clarify my intention, I need to have an analog telephone connection to my asterisk box that is 3000 meters (3km) away at least. If you have any details of ATA boxes or other similar devices that I could use to

...that the impedance is >wrong at the line clock rate (~1MHz). IIRC the impedance for telco is >specified at 600 ohms @ 1MHz, whereas for CAT5 the impedance is actually > T1s are always 100-110ohm, E1s are the same when on pairs, and 75ohm on coax. Only analogue pairs are terminated at 600ohm, and no line can actually be greater than 120*PI (about 377) ohms - that is the impedance of free space. Fudgy 600ohm stuff works at audio frequencies, but you have to treat the line properly as a transmission line as the frequency rises. >specified at around 100MHz, where the ethernet line...