Chapter 5 - Web Interface – Telephony
Voice & Fax Codecs
88
Mediatrix 1204
•
G.726 32 kbps: 99.
•
G.726 40 kbps: 100.
4.
Set the minimum and maximum packetization time values for the G.726 codec in the corresponding
drop-down menu.
The packetization time (also called packetization period or ptime) is the duration, in ms, of the voice
packet.
•
Minimum
: Shortest packetization period allowed for the G.726 codec. Authorized
values start at 10 ms and come in discrete steps of 10 ms up to the one specified by
the corresponding
Maximum
drop-down menu.
•
Maximum
: Longest packetization period allowed for the G.726 codec. Authorized
values go up to 100 ms, in discrete steps of 10 ms, and start at the one specified by the
corresponding
Minimum
drop-down menu.
5.
Click
Submit
if you do not need to set other parameters.
Fax Parameters
The Mediatrix 1204 handles G3 fax transmissions at speeds up to 14.4 kbps. Automatic fax mode detection
is standard on all lines. Real-Time Fax Over UDP with the T.38 protocol stack is also available.
The quality of T.38 fax transmissions depends upon the system configuration, type of call control system used,
type of Mediatrix units deployed, as well as the model of fax machines used. Should some of these conditions
be unsatisfactory, performance of T.38 fax transmissions may vary and be reduced below expectations.
A fax call works much like a regular voice call, with the following differences:
1.
The fax codec may be re-negotiated by using a re-INVITE.
2.
The goal of the re-INVITE is to allow both user agents to agree on a fax codec, which is either:
a.
Clear channel (PCMU/PCMA or G.726) without Echo Cancellation nor Silence Suppression
(automatically disabled).
b.
T.38.
3.
Upon fax termination, if the call is not BYE, the previous voice codec is recovered with another re-
INVITE.
All lines of the Mediatrix 1204 can simultaneously use the same codec (for instance, T.38), or a mix of any of
the supported codecs. Set and enable these codecs for
each
line.
Note:
When selecting the dynamic payload type, make sure that the value is not already used by another
dynamic codec. If a value between 96 and 127 is refused, this means it is already used by another dynamic
codec.
Note:
If you set the
DTMF Transport
field to
outOfBandUsingSignalingProtocol
), you cannot configure a dynamic payload type to 111 because it is already used by the DTMF
out-of-band using signalling protocol.
Summary of Contents for Mediatrix 1204
Page 6: ...Mediatrix Telecom a Division of Media5 Corporation Reference Manual...
Page 26: ...Preface About this Manual End User Technical Support xxvi Mediatrix 1204...
Page 27: ...Installation and Web Page Configuration...
Page 28: ...Page Left Intentionally Blank...
Page 50: ...Chapter 1 Installation Verifying the Installation 24 Mediatrix 1204...
Page 98: ...Chapter 4 Web Interface SIP Parameters SIP Authentication 72 Mediatrix 1204...
Page 127: ...SNMP Configuration...
Page 128: ...Page Left Intentionally Blank...
Page 162: ...Chapter 8 IP Address and Network Configuration Ethernet Connection Speed 136 Mediatrix 1204...
Page 170: ...Chapter 9 SIP Servers Presence Compositor Server 144 Mediatrix 1204...
Page 174: ...Chapter 10 DNS SRV Configuration DNS SRV Oriented Settings 148 Mediatrix 1204...
Page 196: ...Chapter 12 Configuration File Download Configuration File Example 170 Mediatrix 1204...
Page 220: ...Chapter 14 Gateway Configuration Detecting a Far End Disconnect 194 Mediatrix 1204...
Page 240: ...Chapter 16 Voice Transmissions User Gain 214 Mediatrix 1204...
Page 288: ...Chapter 23 Telephony Attributes Delayed Hot Line 262 Mediatrix 1204...
Page 294: ...Chapter 25 Quality of Service QoS VLAN 268 Mediatrix 1204...
Page 298: ...Chapter 26 Syslog Daemon Syslog Daemon Configuration 272 Mediatrix 1204...
Page 302: ...Chapter 27 Statistics RTP Statistics 276 Mediatrix 1204...
Page 319: ...Appendices...
Page 320: ...Page Left Intentionally Blank...
Page 332: ...Appendix B Standard Hardware Information Warranty 306 Mediatrix 1204...
Page 336: ...Appendix C Cabling Considerations RJ 11 Telephone Cable 310 Mediatrix 1204...
Page 372: ...Appendix E Glossary Wide Area Network WAN 346 Mediatrix 1204...
Page 390: ...Index W 364 Mediatrix 1204...