Zultys ZIP4x4, User Manual

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8. Using the Phone
79
8.2.8 Dialling an Invalid Destination
When you initiate the call, the phone performs a simple check on the number or address that you
entered. If this is invalid, the phone displays:
The phone retains this display for three seconds before returning to whatever was displayed prior
to your initiating the call (usually the idle display). If you had selected a call appearance, it will
become idle after five seconds.
8.2.9 Making a Call Without a SIP Proxy
The ZIP4x4 is intended for use with a telephone system but it is possible to use it without one.
You might do this if you have two phones either directly connected or isolated on a network. To
make the call, you must know the IP address of the phone you want to call or the other device
must have an FQDN that your ZIP4x4 can resolve with a DNS server.
To make a call directly to the other device, ensure that:
•
your phone has a unique IP address
•
your phone has not registered with a SIP registrar
•
you know the IP address and device ID of the phone you want to contact
The following instructions contain many steps, some of which may not be applicable, depending
on the configuration of the phone prior to your using it:
1. Log into the phone using the password as described in section 9.6.1 on page 132.
2. Disable DHCP, set a static IP address, subnet mask and default gateway, as described in
section 9.6.2 on page 133.
1
3. Remove the address of the TFTP server and the address of the SIP outbound proxy, as
described in section 9.6.2 on page 133.
4. Assign a unique device ID to the phone and remove the domain name as described in section
9.6.5 on page 141.
5. Repeat these steps for the other phone.
6. Connect the phones so that they can be accessed over the LAN.
7. Create a call from one phone to the other using the method outlined in section 8.2.6 on page
76, but address the other phone by its device ID and IP address:
1. Invalid address
408€32
1. It is not a requirement that the phones have a static IP address. However, if you use DHCP, the phone may receive a
new IP address after its lease expires. You will have to find out this new IP address before you can make a call to that
phone.
1. Call Func:abc
<device ID>@<IP
address>