Cisco ISDN GW 3241 Manual do Utilizador descarregar pdf (Página 25)

Different video conferencing scenarios

ISDN GW and an ISDN endpoint video conferencing

The ISDN gateway is a protocol converter that allows calls between IP and ISDN endpoints. An ISDN

gateway and ISDN endpoint(s) can replace an IP endpoint in any of the previous scenarios and then can be

used in conferences, for point to point calls, and to call out and record from the VCR for example.

Figure 10: ISDN gateway with an IP endpoint and an ISDN endpoint

In the following diagram a computer contributes a content channel and both IP and ISDN endpoints can see

the data being transmitted. Either computer can contribute the data channel, but because there is only one

data channel they cannot both do so at the same time. This is different to the main video and audio

channels: both endpoints can send and receive video and audio simultaneously.

Figure 11: Sharing data with the ISDN gateway with an IP endpoint and an ISDN endpoint

The following diagram shows ISDN endpoints in a conference being hosted by the MCU.

IP network

ISDN

ISDN Gateway

ISDN

endpoint

ISDN

IP network

ISDN

ISDN Gateway

ISDN

endpoint

ISDN

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Cisco ISDN GW 3241 Manual do Utilizador Página 25