Nortel Networks 9150 - Manual (Page 55)

Remote Gateway 9150 Installation and Administration Guide 25
January 2005 Remote Gateway 9150 description
Local call
1 User 1 presses the local call appearance key and hears a dial tone from the
Remote Gateway 9150 unit.
2 User 1 then dials a trunk access code (such as #61) and hears a dial tone
from the Central Office (PSTN).
Note: If all trunks are busy and unavailable, then User 1 hears a fast busy
signal.
3 User 1 dials the telephone number (the pizza parlor in this example). The
dialed digits are sent across the ISDN BRI connection through the PSTN to
the called party.