Specifications

Appendix D - Country-Specific Parameters Definitions
208
Mediatrix 4100
Supported MGCP/NCS Signals
The following are the different MGCP and NCS signals supported by the Mediatrix 4100.
Conventions
The following conventions apply to this Appendix.
Frequencies
 Symbol “*” means modulated. For instance: 425 Hz * 25 means 425 Hz modulated at 25 Hz.
 Symbol “+” means added. For instance: 425 Hz + 330 Hz means that both 425 Hz and 330 Hz
sines are played at the same time.
 When a tone is composed of more than one frequency, if not otherwise specified, the given
electrical level applies to each frequency taken separately.
Impedance
Impedance is the apparent resistance, in an electric circuit, to the flow of an alternating current, analogous to
the actual electrical resistance to a direct current, being the ratio of electromotive force to the current.
When representing an impedance, the following applies:
 Symbol “//” means parallel.
 Symbol “+” means serial.
Furthermore, there are two types of impedances:
 Input Impedance
 Terminal Balance Return Loss (TBRL) Impedance
Input Impedance
Impedance of the Mediatrix 4100 at the Tip and Ring wires.
Table 137: Supported MGCP/NCS Signals
Tone MGCP Signal NCS Signal
Dial Tone L/dl dl
Busy Tone L/bz bz
Ringback Tone G/rt, G/rbk rt, rbk
Special Information Tone L/sit sit
Stutter Dial Tone L/sl, L/sdl sl, sdl
Confirmation Tone G/cf cf
Receiver Off Hook (ROH) Tone L/ot ot
Message Waiting Indicator Tone L/mwi mwi
Reorder Tone L/ro ro
Call Waiting Tone L/wt wt
Alernative Call Waiting Tone L/wt1, L/wt2, L/wt3, L/wt4 wt1, wt2, wt3, wt4
Network Congestion Tone G/cg cg
Intercept Tone G/it it
Preemption Tone G/pt pt
Ring L/rg rg