Analog DID Line Support ?

請問 analog card 系統可否支援舊式 Analog DID (Direct Inward Dial)線路 and DNIS support ?

Thanks

Hello,
OpenVox 的analog card支持DID功能，但你所说的旧式 Analog DID线路具体是什么线路？
DNIS 是指拨号拨号识别服务?

This is for the older style analog inbound only did trunks (DID - Direct Inward Dialing) , These type of trunks require that the customer supply battery (-48v), so obviously normal FXO cards won't work and can't be converted. after line connected will change to +12v. We know the FXS can supply battery and detect loop. The important thing is can it revers battery.

There are three electrical functions:
Loop current detection
Reverse Battery
Battery supply

From a signaling standpoint, the CO "loop" the line, then sends tones down to indicate which number was dialed (DNIS - Dialed Number Identification Service), the tones are not usually (although I think they can be) the dual tones like touch tone, but a single frequency tone.

As I know, cisco 2-Port FXS card can support those functions.

i] Last edited by rickytmp at 2010-2-25 11:14 [/i

I think our FXS can reverse Battery, you can send out a polarity reverse signal to handle this. in the worst case, you can call a wctdm specific function call to enable it.

Thanks for the anser.