TANDBERG D13841.08 ISDN/PRI Configuration ISDN/PRI Versions only, Useruserguideguide, Configuring

ISDN/PRI Configuration (ISDN/PRI Versions only)

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PRI Interface Configuration.

Indicates the lowest numbered E1/T1 B-channel the system is allowed to use for each PRI-line when selecting channels for outgoing calls. Not in use in this version.

Enable CRC-4. Used for most E1-PRI configurations. If your network equipment does not support this feature, switch off PRI CRC-4.

Fractional line operation: Low Channel. Indicates the lowest numbered E1/T1

B-channel the system is allowed to use for each PRI- line when selecting channels for outgoing calls. Presently, this setting has no effect.

Save. When all settings are entered, click on Save to store the new settings.

Note that changing from E1 to T1 configuration requires a restart of the unit (click Restart to restart the unit).

PRI Protocol. Select between the following PRI protocols:

•NI (National ISDN)

•ATT (AT&T Custom)

•Euro (ETSI = Euro ISDN)

•Japan (Japan/Taiwan ISDN)

Outgoing Bearer capability

Within ISDN different bearer capabilities are used to signal the type of data (Voice, Data, H320, H.324M), which is used by telephony switches and other equipment to determine how to handle data or calls (compressing voice data neglect etc). The outgoing bearer capability sets the ISDN bearer capability for the outgoing telephone (voice only) and video telephone calls.

•H.324M: This ITU standardized capability is selected for outgoing calls by default.

•UDI: In some situations the switch does not accept calls which use the correct H.324M capability. This setting makes it possible to use the 3G Gateway in these situations via selecting UDI.

•Prefix on National/International Numbers

•Specifies the prefix, which has to be added to National and International numbers, respectively.

•The signalling specifies whether the call is national or international. Since these prefixes are removed from inbound telephone numbers, the correct prefixes have to be added on call-backs.

These settings only apply if the Service providers network uses prefixes for national and international calls.

All incoming calls are accepted independent of their bearer capabilities, consequently audio calls are accepted as well.

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D13841.08

30

10.2007