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Remote IP Feature Phone Installation Manual
Programming information
Before programming the Remote Phone and the IP PBX, addressing and access information should be
defined and collected.
Important:
We have provided the worksheet in Appendix IV to help you collect the information described on
these pages. Fill out this worksheet and use it during the programming operation.
The private, or local, IP addresses and UDP port numbers should be agreed upon with the site network
administrator or the person designing the network. The ISP provides the public IP addresses. Contact
the ISP if the network administrator cannot provide this information.
In most cases, there won't be a network administrator for the remote site; this will be typical for the
home office installation. Appendix V, "Address discovery at the remote site," provides step-by-step
procedures for determining existing addressing information, such as the gateway address. This
appendix also provides guidelines for selecting a private IP address and a UDP port for the Remote IP
Feature Phone.
There may also be cases where the main office network administrator is not available. Appendix VI provides
a procedure to "discover" the needed main office addressing information. This will be useful for main office
installations where the IP PBX has already been configured for Remote Phone or Esi-Link operation.
Main office parameters
Note: If the main office IP PBX has been previously configured for a remote phone or Esi-Link
multi-site access, these programming parameters will already be programmed into the IP PBX. The same
addressing parameters should be used unless an alternate gateway will be used at the main office for
this Remote Phone. (Refer to Figure 1, page B.2, for examples.)
• PBX private IP address — The address IP PBX uses on the internal network at the main office.
[Item 1 in Figure 1, page B.2.]
• PBX default gateway IP — The internal network address of the default gateway. [Item 2 in
Figure 1, page B.2.]
• Remote-access IP address — The public or private IP address used for remote access to the IP
PBX. [Item 3 in Figure 1, page B.2.] This is typically the public IP address of the main office gateway.
This is programmed in Function 821 and Function 31. If the main office has a single gateway, the
remote-access IP address will be the same in both programming steps; this will be true in the vast
majority of installations. However, in some installations, there may be two or more gateways at the
main office.
If Function 821 has been previously programmed for one gateway, and the remote phone
being programmed will use the other gateway, don't change the remote-access IP address in
Function 821; instead, enter the alternate remote-access IP address in Function 31.
• Base UDP port number — The base UDP port number used by the IP PBX for access through the
main office gateway.
Important:
If the Remote IP Feature Phone will connect via the Internet, the remote-access IP address must
be a public address (assigned by the ISP).
Programming information
B.1
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