Eicon Networks ISDN NT1 Especificaciones descargar pdf (Pagina 43)

1. What must each SETUP message contain?

Every SETUP message must also carry a Call Type.

This provides information about the contents - such as 'Group 3 Fax' or 'Generic Analogue'.

2. How many filters can be applied to a SETUP message?

Only ONE filter can be applied per SETUP message.

3. What call type is given to a fax call coming from an analogue network?

All calls originating on the analogue PSTN network will be automatically allocated the call type 'Generic

Analogue'.

A call might be fax or voice but it will always receive this general call type allocation because there is no

equivalent ability within the PSTN to carry call type information.

4. A fax machine is configured to filter for analogue calls - will it accept G3 Fax calls?

No, it will only accept those calls whose call type is specifically 'Generic Analogue'.

This shows the shortcomings of using the call type filter to allocate calls to devices. Because there can only

ever be one filter type, the results can never cater for all the possible combinations.

5. What filters are used when implementing MSN?

Called Party Number is the filter applied when implementing MSN.

The system relies on having Multiple Subscriber Numbers per line and then allocating those numbers to a

specific device as a filter. That number is then circulated as the number to call for that device, and it will

answer only those calls which have that particular called party number as part of its SETUP.

6. Number of devices equals number of subscriber numbers required for MSN - true or false?

Not necessarily. If there are devices, such as a PC for example, which will never answer a call, then it is not

necessary to have a subscriber number for that device.

The number of subscriber numbers required equals the number of devices which will be required to

selectively answer incoming calls.

7. How might a PC be configured to ensure it never answers the phone?

A PC can be allocated a non-existent number. Since no call will ever arrive for that number, the PC will never

answer any other calls.

Vairāk par MSM - http://www.eicon.com/support/helpweb/diva/msn.htm

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 55 56

Sin comentarios

Eicon Networks ISDN NT1 Especificaciones Pagina 43