Hi,

I am not sure which is the right forum for this question. But here I go...

Many years back I switched from analog phones to IP phones, skipping the DCP phones entirely. Now I have a customer who wants to record a bunch of 2-wire DCP phones, and I am trying to understand them.

Analog port ------> Analog payload + Analog signalling (tone/pulse)

IP port -------> Digital payload (RTP) + Digital signalling (SIP/H.323)

DCP port ------> Analog payload + Digital signalling (???)

Is my understanding correct? If I connect one analog phone along with a DCP phone using RJ11 Y splitter, will I hear the conversation?

As far as I can gather, the connection to a DSP phone is TDM (Time Division Multiplexing). So all information (media & signaling) is digital.

It may be that the format of the data is proprietary which would make it difficult to record directly.

The approved method of recording is to use DMCC.

Martin

The DMCC route is not possible because the phone is a 302D auto attendant console. Those phones can neither be monitored nor recorded using DMCC/TSAPI.

We finally had to use a NGX 800 from from Audio Codes to capture the audio.