Avaya 03-300430 User Manual

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Communication Manager Maintenance-Object Repair Procedures
2370 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
 
TTR-LEV (TTR Level)
S8700 | 8710
 / 
S8500
TN748 and TN420 Tone Detector circuit packs and TN744 Call Classifier circuit packs provide 
tone receivers for detecting various types of signaling tones. These circuit packs are shared 
resources that serve every user of the PBX. This discussion uses the following terms and 
abbreviations (note that the Maintenance-Related System-Parameters screen uses different 
names than the alarm and error logs):
TN748s and TN420s each have 4 DTMR-PTs and 2 GPTD-PTs. DTMR-PTs interpret dual-tone 
multifrequency (DTMF) calling signals and translate them into logical digits 0 through 9, *, and 
#. GPTD-PTs detect call-progress tones, modem answer tones, and transmission test tones.
TN744 Call Classifier circuit packs have 8 CLSFY-PTs. These ports detect DTMF tones and 
classify network and MFC (multifrequency compelled) signaling tones. (That is, CLSFY-PTs can 
function as DTMR-PTs or GPTD-PTs, and have other additional capacities).
When a user goes off-hook to place a call, dial tone is returned to the user, indicating that a tone 
detector is connected and ready to receive and interpret tones. The tone detector is in use until 
the total number of digits needed is collected or until a time-out occurs. If every tone detector in 
the system is being used simultaneously, the next user to go off-hook will not receive dial tone 
until a tone detector becomes available. It is therefore necessary to have a sufficient number of 
tone detectors in the system to prevent delays in receiving dial tone. The list 
measurements tone-receiver
 command shows the level of tone detector usage.
In order to prevent dial-tone delays and other shortcomings in system performance, threshold 
levels for the 3 types of tone receivers are administered on the System-Parameters 
Maintenance screen. Whenever the number of tone receivers in service falls below the 
administered threshold for that type of tone receiver, an alarm is logged against the TTR Level 
MO. At this point, the system is operating properly, but call processing capacity is reduced. 
MO Name
Alarm Level
Initial Command to Run
Full Name of MO
TTR-LEV
WRN
See the 
TTR Level
TTR-LEV
MIN
See the 
TTR Level
TTR-LEV
MAJ
See the 
TTR Level
Type of Tone Receiver
MO
Also Known As
Location
Dual-Tone Multifrequency 
Tone Receiver
DTMR-PT
Touch-Tone Receiver 
(TTR)
4 per TN420/TN748
General-Purpose Tone 
Detector
GPTD-PT
Call-Progress Tone 
Receiver (CPTR)
2 per TN420/TN748
Call Classifier
CLSFY-PT
Call-Classification Tone 
Receiver (CCTR)
8 per TN744