This attribute specifies whether tandem traffic is permitted through
the node.
Tandem traffic is traffic which arrives at the node on a trunk and
leaves the node on a trunk. Traffic to or from a gateway (internal or
external) is not affected by the setting of this attribute.
The default value of this attribute is allowed, which permits tandem
traffic to be routed through the node. When this attribute is set to
denied, DPN, VNS, and PORS traffic are not permitted to tandem
through the node.
Changing this attribute has no effect on PORS calls which were set
up before the change. These calls can be manually forced to reroute
using the new setting by clearing the calls or locking the trunks on
which they are routed.