Shared Service Ports
9-37
Lo
cally D
efin
ed T
o
ne PRO
M
(U1
1
8
) Meet Me Confer
ence Cir
cuitry
9
9.6
Locally Defined Tone PROM
(U118)
0
The MSBipx includes one tone PROM (Programmable Read-Only Memory circuit). The
HDC circuitry located on the MSBipx generates the following tones:
Audio call progress tones used to notify the caller of the status on the call
Tones used during Keyset (FlexSet, GKT, DKT, DST, EKT, VDK, etc.) ringing
(except for mute ring, which is a function of the telephone set itself)
Dual Tone Multi-Frequency (DTMF) dialing tones
Multi-FrequenCy (MFC) dialing tones
Test tone patterns used by diagnostics
These tones are stored in digital PCM form, in PROM U118. The stored tone patterns
are sent directly to the digital PCM bus when required.
Two methods of encoding audio sounds into a digital PCM form are in common use.
The A-Law method is frequently used throughout Europe, Africa, Asia, South
America, and many countries in other continents. The
µ
-Law (pronounced M-YOO
Law, sometimes spelled Mu-Law) method is used in North America. Neither method
has any particular advantage over the other.
The Coral IPx 500 switching system may operate using either encoding method. By
default, the database uses the
µ
-Law method for systems shipped to North America
and the A-Law for all other locations.
See the
Program Interface (PI) and Database Reference Manual
(Chapter-6 System Features
- Tones, Route: SFE, 8, M_LAW) for instructions on the database programming.
In order to operate a system using the non-default encoding method, the database
must be programmed accordingly and the tone PROM (U118) located on the MSBipx
card must be changed to a PROM circuit that contains the system tones stored in the
appropriate encoding method.
The encoding method is only significant when the Coral IPx 500 system interfaces with
another switching system through a digital trunk interface such as a 30Tipx, T1ipx,
PRI23ipx, PRI30ipx, 4TBRipx, 8TBRipx, or 8TBRPipx card. In this case, the encoding
method of both systems must match, so that audio signals encoded by one system can
be properly decoded by the other.
1
General Description
Summary of Contents for Coral IPx 500
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Page 58: ...2 16 Coral IPx 500 Installation Manual Site Inspection 2 NOTES...
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Page 126: ...3 6 Coral IPx 500 Installation Manual Power Supply Test 3 NOTES...
Page 152: ...3 32 Coral IPx 500 Installation Manual Installation Wrap up 3 NOTES...
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Page 184: ...5 14 Coral IPx 500 Installation Manual Protection Devices 5 NOTES...
Page 188: ...5 18 Coral IPx 500 Installation Manual Power Fail PF Transfer Circuits 5 NOTES...
Page 204: ...5 34 Coral IPx 500 Installation Manual MDFipx Units Supplied by the Manufacturer 5 NOTES...
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Page 288: ...6 32 Coral IPx 500 Installation Manual Coral IPx 500M Main Cage Description 6 NOTES...
Page 296: ...6 40 Coral IPx 500 Installation Manual Coral IPx 500X Expansion Cage Description 6 NOTES...
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Page 332: ...7 16 Coral IPx 500 Installation Manual PS500 DC Power Supply Unit 7 NOTES...
Page 350: ...7 34 Coral IPx 500 Installation Manual PS500 AC Power Supply Unit 7 NOTES...
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Page 380: ...8 4 Coral IPx 500 Installation Manual Control Cards 8 NOTES...
Page 404: ...8 28 Coral IPx 500 Installation Manual IMC8 Card Flash Erasable Software Memory Unit 8 NOTES...
Page 412: ...8 36 Coral IPx 500 Installation Manual DBX Card Database Expansion Memory Unit 8 NOTES...
Page 426: ...8 50 Coral IPx 500 Installation Manual CLA Card CoraLINK Adapter 8 NOTES...
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Page 432: ...9 4 Coral IPx 500 Installation Manual Shared Service Circuitry Installation 9 NOTES...
Page 460: ...9 32 Coral IPx 500 Installation Manual Three Way Conference Conference Circuitry 9 NOTES...
Page 490: ...9 62 Coral IPx 500 Installation Manual KB1 KB2 KB3 RS 232E Data Serial Port 9 NOTES...
Page 498: ...9 70 Coral IPx 500 Installation Manual Music Background and Music On Hold M1 M2 9 NOTES...
Page 518: ...9 90 Coral IPx 500 Installation Manual Relay Contacts RLY1 RLY2 RLY3 9 NOTES...
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Page 526: ...10 6 Coral IPx 500 Installation Manual Peripheral Card Installation 10 NOTES...
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