Fxs/Fxo Coefficient Types - AudioCodes Mediant 1000 User Manual

Table 27-7: Tone index Table Parameter Description
Parameter
Index
FXS Port First
fxs-port-first
[ToneIndex_FXSPort_First]
FXS Port Last
fxs-port-last
[ToneIndex_FXSPort_Last]
Source Prefix
src-prefix
[ToneIndex_SourcePrefix]
Destination Prefix
dst-prefix
[ToneIndex_DestinationPrefix]
Priority Index
priority
[ToneIndex_PriorityIndex]

27.12 FXS/FXO Coefficient Types

The device can use the following FXS Coefficient and FXO Coefficient types:

US line type of 600 ohm AC impedance and 40 V RMS ringing voltage for REN 3

European standard (TBR21)
The Coefficient types increase return loss and trans-hybrid loss performance for two
telephony line type interfaces (US or European). The adaptation is performed by modifying
the telephony interface characteristics. This means, for example, that changing impedance
matching or hybrid balance doesn't require hardware modifications, so that a single device
is able to meet requirements for different markets. The digital design of the filters and gain
stages also ensures high reliability, no drifts (over temperature or time) and simple
variations between different line types.
The FXS Coefficient types provide best termination and transmission quality adaptation for
two FXS line type interfaces. The parameter affects the following AC and DC interface
parameters:

DC (battery) feed characteristics

AC impedance matching

Transmit gain

Receive gain
User's Manual
Defines the table index entry. Up to 50 entries can be defined.
Defines the first port in the FXS port range.
Defines the last port in the FXS port range.
Defines the prefix of the calling number.
Defines the prefix of the called number.
Defines the index of the distinctive ringing and call waiting tones.
The call waiting tone index is equal to the value of the 'Priority Index'
parameter plus the value of the FirstCallWaitingToneID parameter
(which defines the index of the first call waiting tone in the CPT file).
For example, if you want to use the call waiting tone in the CPT file
that is defined at Index #9, you need to configure the 'Priority Index'
parameter to "1" and the FirstCallWaitingToneID parameter to "8".
The summation of these values is 9 (1 + 8).
The default is 0.
To configure the CPT file, see ''Call Progress Tones File'' on page
739.
590
Mediant 1000B Gateway & E-SBC
Description
Document #: LTRT-27045