Oki BV1250, Руководство по установке

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Oki BV1250 Installation Guide E&M WORKSHEETS
Revision 1.0 Page 85 of 334
Guard Timing (CO_TRMDLD)
Use the Guard Timing field to record the Guard Timing required by
the PBX to which the BV1250-E&M unit or Trunk Group is
connected.
Guard Timing restricts the use of an E&M trunk for a specified period
of time following the completion of a call. This is required because
the PBX must reset its trunk line access in a specified time and if
another caller attempts to use this trunk prior to the completion of the
reset period, a cross-connect condition may occur. This can result in a
situation in which the next calling party is connected with one or both
of the parties from the previous call. This constraint does not apply
when a different trunk is accessed, even from the same unit.
In the sample, Guard Timing is recorded for all ports as the default
value, 2560 ms.
PAD In and PAD Out (PAD_VALUE)
For each port, use the PAD In and PAD Out fields to record the
amount of PAD to be introduced into the communication between a
BV1250 unit and other devices.
PAD is a voice line gain/loss function expressed in decibels (dB)
which is introduced into communications between a BV1250 unit and
the terminating device (e.g. Telephone/PBX/KTS). This feature is
used to emulate the loss normally generated in PSTN network
transmission.
The following values are provided in the MCS list box.
+14dB, +12dB, +10dB, +8dB, +6dB, +4dB, +2dB, 0dB, -2dB,
-4dB, -6dB, -8dB, -10dB, -12dB, -14dB, -40dB
The recommended value for a BV1250-E&M/E&M-OD unit is 0dB
since the PBX introduces its own padding towards its extensions.
In the sample, the PAD In and PAD Out parameters for all ports are
configured to the defaults for a BV1250-E&M unit, In = 0dB
and Out = 0dB.
In a few cases, these settings may need to be adjusted. See Appendix
F: for details. For example, an FXO unit might be set up with a +4
PAD to compensate for PSTN network loss. Adjustments of the
nature must be performed on a case-by-case basis.
Care must be taken to calculate the end-to-end gain/loss when
reconfiguring the PAD In and PAD Out parameters since these
settings can have a cumulative effect when both are configured.