change system-parameters maintenance
Issue 4 May 2002
A-23 555-233-123
MMIs
The MMIs field contains the minimum number of MMI ports needed for
the Multimedia Call Handling (MMCH) feature to run efficiently. The
MMCH feature must be enabled on the System-Parameters
Customer-Options form before the MMIs field can be changed to a
number greater than zero. If the number of in-service Multimedia
Interface (MMI) ports falls below the minimum port capacity (valid entries
between 0-128), a MMI-LEV error is logged. Each MMI circuit pack
contains a maximum of 32 ports. To alarm the first occurrence of an MMI
being taken out of service, set this field to the total number of MMI ports.
If this outage continues for 15 minutes, a MAJOR alarm is raised.
VCs
The VCs field contains the minimum number of VC ports needed for the
Multimedia Call Handling (MMCH) feature. The MMCH feature must be
enabled on the System-Parameters Customer-Options form before the
VCs field can be changed to a number greater than 0. Each VC circuit
pack contains 16 physical ports: 8 ports are reserved for VC-DSPPT
ports, and the remaining 8 ports are designated as VC-SUMPT ports.
The 8 DSP ports are made up of 4 encoder and 4 decoder resources that
encode and decode audio formats. Thus, one VC circuit pack is required
for every 8 ports of MMCH port capacity. If the number of in-service VC
ports falls below the MMCH port capacity (valid entries between 0 and
128), a VEC-LEV error is logged. To alarm the first occurrence of a VC
port being taken out of service, set this field to the total number of VC
ports. If this outage continues for 15 minutes a MAJOR alarm is raised.
Terminating Trunk Transmission Test (Extension)
Test Type 100
This field specifies extensions assigned to receive tie-trunk calls from
other switches that have test line origination capability. The system
responds by sending a sequence of test tones. Test Type 100 tests far
end to near end loss and C-message by sending:
■ 5.5 seconds of 1004 Hz tone at 0 dB
■ Quiet until disconnect; disconnect is forced after one minute
Test Type 102
Test Type 102 tests far end to near end loss by sending:
■ 9 seconds of 1004 Hz tone at 0 dB
■ 1 second of quiet
■ This cycle is repeated until disconnect; disconnect is forced
after 24 hours.
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