Nortel Meridian Meridian 1 Feature Description And Administration page 1651

Virtual Network Services Page 1651 of 1814
Autoterminate
Autotermination on VNS Bearer trunks is not supported, because a VNS
Virtual DN is expected on a VNS Bearer exactly the way it was passed back
on the VNS D-channel.
Call Detail Recording (CDR)
Call Detail Recording is supported on VNS routes with the exception of the
911 CDR Improvement and Meridian 911 ANI in CDR features. The CDR
output is controlled by the Bearer trunk (i.e., CDR output defines the details
of the call made on the Bearer, and not the VNS D-channel). The Calling Line
Identity will be output in the CDR record for incoming calls.
Call Pickup Network- Wide
The Call Pickup Network Wide feature will not work in conjunction with the
Virtual Network Services feature.
Calling Line Identification
Calling Line Identification is supported on VNS routes. All display
information is taken from messages on the VNS D-channel. The VNS Bearer
does not drive the display of such information.
Charge Display at End of Call
In the case of VNS calls, no charge information is displayed.
Data Calls
Data calls are supported on DPNSS1 or DASS2 VNS Bearer trunks if the
DPNSS1 or DASS2 VNS Bearer trunks are configured to support data calls.
Similarly, data calls are supported on DPNSS1 or DASS2 Bearer trunks in
VNS to DPNNS1/DASS2 gateways, if the DPNSS1 or DASS2 VNS Bearer
trunks are configured to support data calls.
Digital Trunk Interface (DTI) – Commonwealth of Independent
States (CIS)
Virtual Network Services via CIS DTI2 is not supported.
Direct Inward Dialing (DID) Treatment
Since VNS is handling calls as though they were made using ISDN TIE
trunks even when VNS DID Bearer trunks are used, the VNS feature does not
adhere to the special treatment given to regular DID trunks.
International ISDN PRI Feature description and administration