Yealink SIP-T2 SERIES Administrator's Manual page 770

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
2. In the Local RTP Port block, enter the max and min RTP port in the Max RTP
Port(1~65535) and Min RTP Port(1~65535) field respectively.
3. Click Confirm to accept the change.
TR-069 is a technical specification defined by the Broadband Forum, which defines a
mechanism that encompasses secure auto-configuration of a CPE (Customer-Premises
Equipment), and incorporates other CPE management functions into a common
framework. TR-069 uses common transport mechanisms (HTTP and HTTPS) for
communication between CPE and ACS (Auto Configuration Servers). The HTTP(S)
messages contain XML-RPC methods defined in the standard for configuration and
management of the CPE.
TR-069 is intended to support a variety of functionalities to manage a collection of CPEs,
including the following primary capabilities:
Auto-configuration and dynamic service provisioning

Software or firmware image management

Status and performance monitoring

Diagnostics

The following table provides a description of RPC methods supported by IP phones.
RPC Method
GetRPCMethods
748
Description
This method is used to discover the set of methods