AudioCodes Mediant 800 - Page 1378

CHAPTER72 Configuration Parameters Reference
Mediant 800 Gateway & E-SBC | User's Manual
Parameter Description
'PCM Law Select'
configure voip > media tdm >
pcm-law-select
[PCMLawSelect]
Defines the type of pulse-code modulation
(PCM) companding algorithm law in input and
output TDM bus.
■ [1] Alaw
■ [3] MuLaw
The default value is automatically selected
according to the Protocol Type of the selected
trunk (E1 defaults to A-Law; T1 defaults to Mu-
Law). If the Protocol Type is set to NONE, the
default is MuLaw.
Note:
■ For the parameter to take effect, a device
reset is required.
■ Typically, A-Law is used for E1 spans; Mu-
Law for T1/J1 spans.
■ Typically, A-Law is used for most BRI
variants.
'Idle PCM Pattern'
configure voip > media tdm >
idle-pcm-pattern
[IdlePCMPattern]
Defines the PCM Pattern that is applied to the
PSTN timeslot (B-channel) when the channel
is idle.
The range is 0 to 255. The default is set
internally according to the Law select 1 (0xFF
for Mu-Law; 0x55 for A-law).
Note: For the parameter to take effect, a
device reset is required.
'Idle ABCD Pattern'
configure voip > media tdm >
idle-abcd-pattern
[IdleABCDPattern]
Defines the ABCD (CAS) Pattern that is
applied to the CAS signaling bus when the
channel is idle.
The valid range is 0x0 to 0xF. The default is -1
(i.e., default pattern is 0000).
Note:
■ For the parameter to take effect, a device
reset is required.
■ The parameter is applicable only when
using PSTN interface with the RAW_CAS
protocol.
General
'TDM Bus Clock Source'
[TDMBusClockSource]
Defines the clock source to which the device
synchronizes.
■ [1] Internal = (Default) Generate clock
from local source.
■ [4] Network = Recover clock from PSTN
line.
Note:
■ For the parameter to take effect, a device
reset is required.
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