Appendix D - Country-Specific Parameters
Definitions
312
Mediatrix 1204
Input Impedance
Impedance of the Mediatrix 1204 at the Tip and Ring wires.
Terminal Balance Return Loss (TBRL) Impedance
Balance return loss attributable to transmission loss between two points. It is used to characterize an
impedance balancing property of the 2-wire analog equipment port.
Each country has its own definition of the TBRL value. For instance, in North America, TIA/EIA 464 (and TIA/
EIA 912) define two TBRL values:
600
Ω
for “on-premise” or short loop ports.
350
Ω
+ (1000
Ω
|| 21 nF) for “off-premise” or long loop ports.
A wire length above 2.5 km is considered long loop according to TIA/EIA 912 section 6.4 (7)(b)).
In Europe, ETSI 300 439 also mentions a TBRL value. However, most European countries have different
requirements regarding the TBRL Impedance. This is also true for other countries around the world. Each one
of them has different requirements.
Line Attenuation
Values are given in dBr (deciBel relative):
A “+” for input means that the digital side is attenuated by x decibels relative to the analog side.
A “+” for output means that the analog side is amplified by x decibels relative to the digital side.
A “-” for input means that the digital side is amplified by x decibels relative to the analog side.
A “-” for output means that the analog side is attenuated by x decibels relative to the digital side.
On-Off Sequences
Values in bold are “on” cycles, where tones are audible. Values in normal style are “off” cycles, where tones
are not audible. When not otherwise specified, sequences repeat forever. A “x” symbol means that the
sequences between parenthesis is repeated x times. The next cycle(s) repeat forever, unless otherwise
specified. Values are in seconds.
For instance:
3*(
0.1
– 0.1) then
0.6
– 1.0 -
0.2
– 0.2
means that the 0.1s on and 0.1s off sequence is repeated 3 times, afterwards the 0.6s on, 1.0s off, 0.2s on
and 0.2s off sequence repeats forever.
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...