User guide

Chapter 4—Configuring your VOIP
Multi-Tech Systems, Inc. 31
Configurable Payload Type
The Configurable Payload Type is located on the bottom of the Voice/Fax screen. The Configurable Payload Type
is used when the remote side uses a different payload type for the associated features. In previous firmware
versions, MultiVOIP’s used 101 for DTMF RFC2833. If the remote side uses some other dynamic payload type
such as 110, it will fail. To avoid these failures, the payload types are made configurable.
DTMF RFC2833 Configurable Payload Type is supported only for SIP & SPP but not for H.323.
Whenever you interoperate with older MultiVOIP products (that is, earlier than release n.11), for backward
compatibility, make sure to configure the payload type values to default ones, which match the values of older
MultiVOIP’s.
Interface
The Telephony Interface parameters are set individually for each channel and include the line types as well as
some specific situational settings for those that need them. The kinds of parameters for which values must be
chosen depend on the type of telephony supervisory signaling or interface used. Here you will find the various
parameters grouped and organized by interface type. In each field, enter the values that fit your particular
setup. The screen below shows more options available than are actually used for clarity. Your settings will
determine what fields are available.
Telephony parameters