Chapter 12 VoIP Trunking

Other settings controlled by the auto attendant include a time limit to decide whether you want to forward a call from the ZyXEL Device or call the phone directly connected to the ZyXEL Device. When you call into your ZyXEL Device you can request to forward a call to another phone number simply by dialing that number. If you don’t dial any number within a specified time limit (for example 5 seconds) then the phone directly connected to the ZyXEL Device rings. It also controls the time limit you have between dialing digits of a phone number.

12.2.2 Peer Call Authentication

VoIP devices can make peer calls to each other by using the IP address instead of a SIP number to establish a call. The advantage of this is that you do not need to pay a VoIP service provider. VoIP devices that connect using an IP address are referred to here as peer devices. A local peer device is where the VoIP call originates and a remote peer device is where the VoIP call ends. In the following figure, local peer device (A) connects to a remote peer device (B) via the IP address of B.

Figure 119 Peer Devices Connecting

A peer-to-peer call doesn’t require any authentication, however, authentication is required when you request the remote peer device to forward a call. The remote peer device has a list of accounts, each consisting of a username and password, which are allowed to use the remote peer device to forward calls. These accounts make up an incoming authentication list.

The local peer device has a corresponding list of outgoing authentication accounts. These accounts consist of the IP address of a remote peer device, the port number to communicate over as well as a username and password to use for authentication. An outgoing authentication account must match an incoming authentication account’s username and password in order for the remote device to forward calls. The following table shows example entries for incoming and outgoing authentication. The bolded entries must match in order for authentication between two peer devices to occur.

Table 80 Matching Incoming and Outgoing Authentication

ACCOUNT DETAILS

LOCAL PEER DEVICE

REMOTE PEER DEVICE

Outgoing Authentication

 

 

 

 

 

Username

localDeviceA

localDeviceB

 

 

 

Password

passwordA

passwordB

 

 

 

Incoming Authentication

 

 

 

 

 

Username

userone

localDeviceA

 

 

 

Password

userpassword

passwordA

 

 

 

212

 

P-2602HWLNI User’s Guide