Downgrading Dei Chassis; Time Slots For Deis - Mitel MiVoice Office 250 Installation And Administration Manual

Table 37: Troubleshooting DEIs (Continued)
Scenario
After upgrading to v3.0 or
later, the system cannot
communicate with the third
and/or fourth DEI(s).
The system is showing "Out
of Voice Channels" alarm.

Downgrading DEI Chassis

To downgrade DEI chassis:
To connect a DEI that has v3.0 or later firmware to a pre-v3.0 5000 CP, the system must
downgrade the DEI firmware during installation. Do not connect more than one DEI to the
pre-v3.0 5000 CP at a time. Follow the procedure "Installing/Upgrading the DEI Chassis" on
page 217.

Time Slots for DEIs

Table 38
summarizes the devices, features, and modules that require time slots.
Digital Telephones
Digital Telephone/MDPM
Dual Single Lines
Dual DID
Single Line/DID
Digital Telephone with OHVA Receive On
Single Line Module - 8
Cause
Incorrect license.
One or more DEI(s) have over
allocated voice channels.
The system is set to 2-DEI
mode.
A call on a DEI failed because of
timeslot/voice channel over
allocation.
Table 38: Time Slots for DEIs
Device/Feature
Resolution
Obtain a valid v3.0 license with the
appropriate number of DEIs.
Redistribute devices among the DEIs to
avoid voice channel over allocation.
Disable features such as OHVA,
dual-SLAs, or MDPMs to reduce the
required voice channels on a DEI.
Change the DEI Mode setting in DB
Programming to 4-DEI mode.
Move devices to other DEIs to eliminate
the timeslot over allocation.
Time Slots Used
1
2
2
2
2
2
8
Installation
(Sheet 2 of 2)
219