Function 23: Co Line Parameters; Function 24: Caller Id - ESI IVX C-Class Installation Manual

Function 2: CO lines

Function 23: CO line parameters

Function 231: System CO line receive volume
Many variables can affect the volume of the CO lines. Weak lines can reduce the system's ability to
properly detect DTMF dialed by an outside caller. Conversely, "hot" lines can cause DTMF distortion
and/or increase the opportunity for message talk-off (i. e., messages being cut off before completion).
Ideally, a message recorded from an outside call has the same playback volume as the system prompts.
This function can be used to adjust the gain of the receive volume of the CO lines system-wide.
Range: 0–12 (lowest to highest gain, respectively).
Default: 10.
Function 232: Line disconnect
You can set the lines to detect the open loop interval (if available from the CO) and disconnect more
quickly. This will also allow the system to drop abandoned calls from hold, as well as reduce the
possibility that abandoned calls could create messages that are either silent or contain CO-
generated tones. Since open loop intervals generated by the CO may vary in duration, use this
function to program the system to less than or equal to the CO open loop interval.
If this programmed value is set unnecessarily low, the system may falsely interpret static or a
momentary loop break as an open loop and disconnect a caller on hold or in the process of leaving
a message. If this value is set too high, the system may not detect a valid open loop signal for
fastest call processing.
Range: 1–255 (10–2,550 ms) (or 0 to turn off open loop detect).
Default: 6 (60ms).

Function 24: Caller ID

This function activates the Caller ID capability in the IVX C-Class system — if the customer has ordered
Caller ID service from the Telco. The IVX C-Class system will display the caller's name (or "
etc.) for incoming calls or messages (or show the Caller ID number if the CO only provides a number).
Default: Disabled.
Esi-Dex and auto callback
message playback or after an Esi-Dex search. Caller ID numbers received from the CO are 10 digits long
(and include the area codes for local calls). In auto callback, the IVX C-Class system assumes all
calls are to be long distance and will automatically add a "1" prefix to the 10 digits to be dialed.
A table of local area codes can be programmed to indicate that calls to those area codes are to be
dialed as local calls. Select one of the following two types of local dialing for each area code entered:
• Local 7 — Local calls that can be dialed only as seven-digit numbers (the IVX C-Class system strips
the area code before dialing and will not add a "1" prefix).
• Local 10 — Local calls that can be dialed only as 10-digit numbers (the IVX C-Class system will not
add a "1" prefix).
For an area code that can be called as a long distance number (with a "1" prefix) and as a local number
(10 digits without a prefix), decide which case is the more prevalent and then add to or exclude from the
area codes exception list accordingly. Thus, some of these calls must be made manually.
Note: Since the Caller ID information is transmitted from the CO during the silence between the first and
second rings, enabling this feature will delay the answer of inbound calls until the second ring.
1
Esi-Dex isn't available on the 12-Key Digital Feature Phone.
E.4
1
— This is accomplished by pressing FLASH/RDL or ESI-DEX either during
IVX C-Class Installation Manual
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