AudioCodes Mediant 800 User Manual page 1378

CHAPTER 72 Configuration Parameters Reference
'PCM Law Select'
configure voip > media tdm >
pcm-law-select
[PCMLawSelect]
'Idle PCM Pattern'
configure voip > media tdm >
idle-pcm-pattern
[IdlePCMPattern]
'Idle ABCD Pattern'
configure voip > media tdm >
idle-abcd-pattern
[IdleABCDPattern]
General
'TDM Bus Clock Source'
[TDMBusClockSource]
Parameter
- 1338 -
Mediant 800 Gateway & E-SBC | User's Manual
Description
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.
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.
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.
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.