Zyxel-communications Omni TA128 Bedienungsanleitung PDF herunterladen (Seite 38)

AT&L1 - Analog adapter 2 has the higher priority to answer a

voice or voice-band-analog-data call; if analog adapter 2 is busy,

the call will be routed to analog adapter 1.

Multi auto-answering of data calls

When an ISDN data call comes in, the TA128 can determine the

protocol to be used in one of two ways:

1. By way of the information conveyed by the SETUP message

(for DSS1, these include the Bearer-Capability, Low-Layer-

Compatibility, or High-Layer-Compatibility information

elements; for 1TR6, these include the Service Indicator as well

as an Additional Octet of the Service Indicator)

2. By the Multi Auto-answering process. The TA128 determines

the protocol by monitoring the B channel signal sent by the

calling site.

With either method, the data call can be identified by the TA128 to

be X.75, V.110, V.120, or PPP, MPPP Async-to-Sync conversion.

If the address-matching process is again unable to tell which

protocol to use, the TA128 will go into its “Multi Auto-answering

Routine,” by examining the B channel data pattern and hence

determine the protocol to use.

When alerted, the TA128 will send a RING message to the DTE in

the following format:

RING

FM:17145522863 TO:17142630398

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 172 173

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Zyxel-communications Omni TA128 Bedienungsanleitung Seite 38