
Chapter 7 Optional VoIP trunk configurations 135
IP Telephony Configuration Guide
For a list of limitations and requirements for using T.38 fax, refer to “T.38 fax restrictions and
requirements” on page 181.
Remote voice mail MWI over VoIP trunks
If the remote voice mail system resides on a Meridian 1 system, that system should have the MWI
package to allow message waiting indicators to occur on network telephones. In this case, the IP
trunking Remote Capability MWI field should be set to Yes (the default), to indicate that the
Business Communications Manager is compatible with the M1.
If the M1 does not have the MWI package, you need to set the IP trunking Remote Capability
MWI field to No, to indicate that there is no compatibility.
To set MWI capability for VoIP trunks:
1 In the Unified Manager, press the keys beside Services and General Settings.
2 Select IP trunking.
3 In the IP trunking screen, select Y or N from the dropdown menu beside Remote Capability
MWI.
Figure 46 Enabling remote message waiting capability
Note: SIP trunks do not support MWI.
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