Tone Clock

[scottyjohn]

Hi all,
Im really just trying to improve my knowledge of how my switch works. Can anyone explain what the tone-clock/call classifier does in the system? John

http://www.eagle-i.co.uk

 

[mcopini]

For short: signaling, clocking, tone-detection and tone-generating...
Was that short or what?

If want you want to get deeper into that stuff, try to get your hands on an installation&maintenance hardware course from (former!) Avaya University or some other educational comp. Explaining this hardware is rather hard to do in a few sentences...

Good luck!

Kind Regards,
Maarten Copini

http://www.effecta.nl

-Please let fellow members know if their post was of any help-

 

[scottyjohn]

Unfortunately my company wont stretch to an I&M course. Ive been on all the admin ones but they all seemd to avoid the questions like that by using the statement "well thats actually covered in our I&M course". Very helpful!
Ive tried everything I can think of and cant seem to find details of these components anywhere.
We had a switch consultant on-site a while ago and he is really helpful, Ill need to see if I can take him for a beer or two one night and get him to explain a few things to me!
Anyone else that can help, let me know,
Thanks Maarten John

http://www.eagle-i.co.uk

 

[europe]

TN2182B Tone-Clock, Tone Detector, and Call Classifier (replaces TN419B and TN768)
The TN2182B tone-clock integrates the tone generator, tone detection-call classifier, system clock, and synchronization functions onto 1 circuit pack for all system reliability configurations. The TN2182B supports 8 ports for tone detection and allows gain or loss applied to PCM signals received from the bus. The TN2182B provides Stratum 4 enhanced clock accuracy, supports MFC signaling (such as Russia MF), supports Russia MFR (multi-frequency shuttle Register signaling) and supports A-Law and µ-Law companding. The TN2182B provides continuous, cadenced and mixed tones, allows administrable setting of tone frequency and level, detects 2025 Hz, 2100 Hz, or 2225 Hz modem answerback tones, and provides normal and wide broadband dial tone detection.
In most configurations, the 2- or 3-circuit pack combination of tone generator, tonecdetector, and/or call classifier can be replaced with this 1 circuit pack, freeing 1 or 2 port slots.
The TN2182B Vintage 1 includes all the functionality found on the TN744D. Use the TN2182B Vintage 1 with the TN429C analog line central office trunk for CAMA/E911 and the TN429D DIOD central office trunk for ICLID.
The TN2182B replaces the TN768 in an upgrade to R9. The TN 768 is an acceptable
Tone-Clock for R7 or R8. A TN2182 is required for the on-board tone detection or for
additional tones to support CCRON, Russian ANI, and others.

TN744B/C/D Call Classifier Tone Detector, Multi-Country
TN744B has 8 tone detectors used in vector prompting, outgoing call management
(OCM), and call prompting applications in the United States and Canada. The TN744B
detects special intercept tones used in network intercept tone detection in OCM. The
TN744B also detects tones when a CO answers a call. The TN744B does not classify
data calls. Instead, a tone detector circuit pack classifies the calls. If the TN744B does not
classify the call within 60 seconds, it is removed from the call and timed far-end
supervision classifies the call.
The TN744B provides tone generation and detection for R2-MFC DID signaling used in
non-United States installations. The TN744 also allows gain or loss to be applied to pulse
code modulation (PCM) signals received from the bus and supports A-Law and µ-Law
companding. The TN744B detects 2025 Hz, 2100 Hz, or 2225 Hz modem answerback
tones and provides normal broadband and wide broadband dial tone detection. For MFC,
the TN744B vintage 7 or greater call classifier is required.
TN744B/C circuit pack has 8 ports of tone detection on the TDM bus. The TN744/B/C
does not support call progress tone generation or clocking
The TN744/B/C processor supports digital signal processing of PCM signals on each port
to detect tones and other signals. Generation of signaling tones is also supported for
applications such as R2-MFC, Spain MF, and Russia MF. Gain (or loss) and conferencing
can be applied to PCM signals received from the TDM bus. Additional support includes
DTMF detectors to collect address digits during dialing, and A-Law and µ-Law
companding.
TN744D circuit pack has 8 ports of tone detection on the TDM bus. The TN744D does
not support call progress tone generation or clocking. The TN744D supports all of the functions of the TN744C plus additional call classifier
options for various countries. The TN744D processor supports digital signal processing of
PCM signals on each port to detect, recognize, and classify tones and other signals.
Generation of signaling tones is also supported for applications such as R2-MFC, Spain
MF, and Russia MF. Gain (or loss) and conferencing can be applied to PCM signals
received from the TDM bus. Additional support includes DTMF detectors to collect
address digits during dialing, and A-Law and µ-Law companding.
In normal operation, a port on the TN744D may serve as an incoming register for Russia
MFR (multi-frequency shuttle register signaling). Use the TN744D Vintage1 with the
TN429C analog line central office trunk for CAMA/E911. Please let me know if the information that was provided is helpfull.
Edwin Plat
A.K.A. Europe