IP Server 900 Programming Manual Function 2: CO line programming
E.35
Function 23: Line parameter programming
Function 231: CO line receive volume programming
Many variables can affect the volume of the CO lines. Weak lines can reduce the IP Server 900’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: 0–14 (lowest to highest gain, respectively). Default: 10.
Function 232: Open loop programming
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.
• Reduce the opportunity for abandoned calls to be transferred by the auto attendant
• 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 233: T1 line receive volume
Many variables can affect the volume of the T1 lines. Different volume levels may be required when
connecting a T1/PRI Module, depending on the signal level of the T1. The volume level can be adjusted by
increasing or decreasing the digital pad setting. By default, the digital pad setting is 0 db. Changes to the
setting are in 2-db increments.
Example: If calls received at the extension have low volume levels, the pad level for that T1 circuit can be adjusted
to increase the volume. Select the circuit to adjust by pressing the appropriate programmable feature key
and press # to confirm. Use the scroll keys to select the appropriate db level and press # to confirm.
(Continued)
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