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7-4 Feature interaction
element terminates to a PRI directly or is mapped to NATIONAL or
INTERNATIONAL Nature-of-Address (NOA) parameter in the Initial
Address Message (IAM) for SS7 termination, it is set to E.164 in the
outgoing SETUP message. In other words, no NSF is sent.
VNET
If the NSF information element is set to VNET, a request is sent to the NCS
for real-time database translation. If the NCS returns a VNET direct
termination response, the NSF is set to VNET (for PRI direct termination) or
mapped to VNET NOA parameter in the IAM. If the NCS returns a
DDD/IDDD response, the call is treated as PRISM; the SETUP message is
passed as if the call is a public call.
Unsupported NSF value
If a call originates on a DMS-250 switch and terminates to either a
DMS-100 or SL-100 with an unsupported NSF value, the call proceeds after
the originating DMS-250 switch receives the associated STATUS message.
If a call originates on a DMS-250 switch and terminates to an SL-1 with an
unsupported NSF value, the call is taken down.
The DMS-250 delivers originating PRI calls as well as originating PTS calls
(as shown in Figure 7-2).
297-2521-106 Standard 23.01 March 2001
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