Pri Networking Using Call-By-Call Services - Nortel BCM50 Configuration Manual

The call appears on the auto answer line on the BCM in Santa Clara as 6-221. Because 6 is
programmed as a destination code for Toronto on the Santa Clara system, another call is placed
using route 002 from Santa Clara to Toronto. At the Toronto system, the digits 6-221 are
interpreted as a target line Private received number. The call now alerts at DN 6221 in Toronto.
Note: Network calls that use routes are subject to any restriction filters in
effect. If the telephone used to make a network call has an appearance of a line
used by the route, the call will move from the intercom button to the Line
button. The telephone used to make a network call must have access to the line
pool used by the route. Network calls are external calls, even though they are
dialed as if they were internal calls. Only the features and capabilities available
to external calls can be used.When programming a button to dial a Network
number automatically (autodial), network calls must be treated as external
numbers, even though they resemble internal telephone numbers. Routes
generally define the path between your BCM switch and another switch in
your network, not other individual telephones on that switch.

PRI networking using Call-by-Call services

The example shown in
offices of a company, one in New York and one in Toronto. Each office is equipped with a BCM
system and a PRI line. Each office has to handle incoming and outgoing calls to the public
network. In addition, employees at each office often have to call colleagues in the other office.
Refer to "Private networking: PRI Call-by-Call services" on page 343
Chapter 2 System telephony networking overview
Figure 5 highlights the use of PRI Call-by-Call services. It shows two
for more information.
Networking Configuration Guide
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