Nortel SRG200 Configuration Manual page 79

Dialing Plan configuration Page 79 of 254
Normal Mode: SRG IP Phone makes a call over the PSTN
Zone management at the main office recognizes that an SRG IP Phone in
Normal Mode is dialing the PSTN. Figure 12 shows how the call proceeds.
Figure 12
Normal Mode: SRG IP Phone makes a call over the PSTN
Main Office Configuration for SRG200/400 Release 1.5 Configuration Guide