Synway Information Engineering Co., Ltd
SMG Series Analog Gateway User Manual (Version 1.5.3)
Page 31
CODEC Priority
Supported CODECs and their corresponding priority for the IP end to establish a
call conversation. The table below explains the sub-items:
Sub-item Description
Priority
Priority for choosing the CODEC in an SIP conversation. The
smaller the value is, the higher the priority will be.
CODEC
Three optional CODECs are supported:
G711A
,
G711U
,
G729A/B
,
G723
, G722, AMR and
iLBC
.
Packing Time
Time interval for packing an RTP packet, calculated by ms.
Bit Rate
The number of thousand bits (excluding the packet header) that
are conveyed per second.
By default, all of the seven CODECs are supported and ordered G711A, G711U,
G729A/B, G723, G722, AMR and iLBC by priority from high to low.
The packing time and bit rate supported by different CODECs are listed in the table
below. Those values in bold face are the default values.
COEDC
Packing Time (ms)
Bit Rate (kbps)
G711A
5 / 10 /
20
/ 30 / 40 / 50 / 60
64
G711U
5 / 10 /
20
/ 30 / 40 / 50 / 60
64
G729A/
B
20 8
G723
30
/ 60 / 90
5.3 /
6.3
G722
5 / 10 / 20 /
30
/ 40
64
AMR
20
/ 40 / 60 / 80 / 100
4.75 / 5.15 / 5.90 /
6.70
/ 7.40 /
7.95 / 10.20 / 12.20
20
/ 40
15.2
30 13.3
iLBC
60
13.3 / 15.2
3.5 Advanced Settings
Advanced Settings includes thirteen parts:
FXS
,
FXO
,
Tone Detector
,
Tone Generator
,
DTMF
Detector
,
Ringing Scheme
,
Fax
,
Function Key
,
Dialing Rule
,
Dialing Timeout
,
Cue Tone,
Color Ring
and
QoS
FXS
is used to configure the general properties of the
FXS port,
FXO
is used to configure the general properties of the analog voice ports, such as the
conditions for sending the caller party information.
Tone Detector
is used to configure some
properties of detected tones.
Tone Generator
is used to configure some properties of generated
tones.
DTMF Detector
is used to set the properties related to DTMF.
Ringing Scheme
is used to
set the ringing scheme for the FXS port.
Fax
is used to configure multiple fax parameters.
Function Key
is used to set a cluster of combination keys for you to query a related number.
Dialing Rule
and
Dialing Timeout
are used to set the judging conditions for dialing.
Cue Tone
is
used to set the gateway language for playing voice and the voice file used for the two-stage
dialing.
Color Ring
is used to upload the color ring file which can be set as a ringback tone for an
incoming call from IP to FXS port.
QoS
uses the differentiated services technology to increase the
gateway’s service quality.