EasyManuals Logo

Yealink CPE80 Administrator's Guide

Yealink CPE80
321 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #161 background imageLoading...
Page #161 background image
Configuring Call Preferences
145
DTMF Keypad Frequencies:
1209 Hz
1336 Hz
1477 Hz
1633 Hz
697 Hz
1
2
3
A
770 Hz
4
5
6
B
852 Hz
7
8
9
C
941 Hz
*
0
#
D
Methods of Transmitting DTMF Digit
Three methods of transmitting DTMF digits on SIP calls:
RFC 2833 -- DTMF digits are transmitted by RTP Events compliant to RFC 2833.
INBAND -- DTMF digits are transmitted in the voice band.
SIP INFO -- DTMF digits are transmitted by SIP INFO messages.
The method of transmitting DTMF digits is configurable on a per-line basis.
RFC 2833
DTMF digits are transmitted using the RTP Event packets that are sent along with the voice path.
These packets use RFC 2833 format and must have a payload type that matches what the other
end is listening for. The default payload type for RTP Event packets is 101 and the payload type
is configurable. The VC110 uses the configured value to negotiate with the other end during call
establishment.
The RTP Event packet contains 4 bytes. The 4 bytes are distributed over several fields denoted as
Event, End bit, R-bit, Volume and Duration. If the End bit is set to 1, the packet contains the end
of the DTMF event. You can configure the sending times of the end RTP Event packet.
INBAND
DTMF digits are transmitted within the audio of the IP phone conversation. It uses the same
codec as your voice and is audible to conversation partners.
SIP INFO
DTMF digits are transmitted by the SIP INFO messages when the voice stream is established
after a successful SIP 200 OK-ACK message sequence. The SIP INFO message is sent along the
signaling path of the call. The SIP INFO message can transmit DTMF digits in three ways: DTMF,
DTMF-Relay and Telephone-Event.

Table of Contents

Other manuals for Yealink CPE80

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Yealink CPE80 and is the answer not in the manual?

Yealink CPE80 Specifications

General IconGeneral
BrandYealink
ModelCPE80
CategoryConference System
LanguageEnglish

Related product manuals