4-14
Chapter 4
Configuring the System
Setting up PCM Type
PCM (Pulse Code Modulation) is the most frequently used analog-to-digital encoding (A/D
conversion technique to convert analog voice into digital signal). SMG-400 provides 2 PCM types,
which are A-law and U-law.
☞
A-law
: A-law is an ITU-T (International Telecommunication Union) standard for analog-to-
digital conversion in PCM. A-law is used in most of the telephone networks in
Europe, and similar to U-law used in North America.
☞ μ
-law :
μ
-law is an ITU-T (International Telecommunications Union)standard for analog-to-
digital conversion in PCM.
μ
-law is used in most of the telephone networks in
North America.
Setting up the PCM type of the SMG-400 using the following directions.
1. In the <PSTN Configuration Menu> screen, type ‘2’ and press [Enter].
<<<<< PSTN Configuration Menu >>>>>
[0] Gateway Operation Mode
[1] PSTN Rerouting Insert Digit
[2] PCM Method
[3] Dial Method
[4] SLI Signal
[5] Trunk Signal
[6] Call Control Method
[7] Ring Cadence
[8] System Tone Cadence
[9] CO Tone Cadence
[10] Gain Control
[11] Diagnosis
[12] MMC Port Block/UnBlock
[13] Display Card Configuration
[14] Display Port Status
[15] Save & Exit
[16] Exit
Select ? 2
