Nortel Meridian Meridian 1 Feature Description And Administration page 1657

Virtual Network Services Page 1657 of 1814
EuroISDN Trunk - Network Side
Virtual Network Services is supported on a EuroISDN Trunk - Network Side
connectivity, meaning that a EuroISDN Trunk - Network Side trunk can be
used as a VNS bearer trunk.
Incoming Digit Conversion
Since VNS Virtual DNs must be received on the incoming VNS Bearer (DID)
trunks, as they are defined at the terminating node, the VNS feature is not
supported for routes that perform digit conversion on the digits used for VNS
Virtual DNs.
ISDN Call Connection Limitation (ICCL) Checks
The VNS trunk from the external network looks exactly like an ISDN TIE
trunk and accordingly is subject to ICCL checks and call restrictions applied
thereon.
ISDN PRI/BRI Meridian 1 to Asia Pacific Connectivity
It is not possible to configure an Asia Pacific D-channel as a VNS D-channel.
However, the voice connection through the Public Exchange of a VNS call
may use a PRI/BRI COT or DID as a virtual TIE trunk.
ISDN QSIG Basic Call
A QSIG link can be used as a B-channel for the Virtual Network Service
(VNS) over a private network. All VNS services are supported as normal.
QSIG is only used as a speech bearer.
Intercept Treatment
Intercept treatment applied to VNS calls is configured as for TIE trunks.
Network ACD
Network ACD (NACD) is supported by VNS. When a call queued at a source
node receives notification that an agent is free and reserved at the target node,
a VNS call is made to the target node. At that time, the call is removed from
the queue at the source node. The call will continue to receive ringback (or
Recorded Announcement (RAN) if configured) while it is waiting for the
VNS call to be completed. When an alerting message is received from the
target node, the ringback or RAN is removed and the speechpath with the
Bearer is connected. The user will thus hear ringback tone (given either by the
PSTN or the Meridian 1 at the target node, depending on the Bearer type),
until the agent answers the call.
International ISDN PRI Feature description and administration