Configuring
Checking FXO Configuration
If you configured your FXO interface according to this example, you can place outgoing calls over the PSTN. If you have trouble placing calls, use the show voice port command to make sure that the VIC is installed correctly. Use the show
Note Refer to the section “Tuning Parameters for
Configuring E&M Interfaces
If you have more than a few voice users at each location, the cost of voice ports and routers and the effort needed to configure dial peers for all the combinations of origins and destinations increases rapidly. In this situation, it might be more efficient to use a PBX at each location to switch local traffic and direct incoming calls and then use E&M VICs to connect the PBXs over an IP network.
Figure 19 shows a company with two offices, West and East. Each office has a PBX to operate its internal telephone network, and the IP network carries voice traffic between the offices. Each PBX connects to an E&M VIC port in the router.
Figure 19 Linking PBXs over the IP Network (Local Dial Peers)
408
PBX
E&M VIC
0/0192.168.11.3
West | IP cloud |
East |
919
PBX
port 0/0
Destination
Source
22342
To configure E&M voice ports, you need to use the following commands beginning in privileged EXEC mode:
Command | Task |
|
|
| Select the appropriate dial type for |
|
|
signal | Select the appropriate signal type for this |
| interface. |
|
|
cptone {australia brazil china finland | Select the appropriate voice call progress tone for |
france germany japan northamerica | this interface. |
unitedkingdom} |
|
|
|
operation | Select the appropriate cabling scheme for this |
| voice port. |
|
|
type {1 2 3 5} | Select the appropriate E&M interface type. |
|
|
Cisco 1751
| 23 |
| |
|
|