AudioCodes Mediant 500 MSBR, User Manual

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User's Manual 1140 Document #: LTRT-10375
Mediant 500 MSBR
Table 74-58: TDM Bus and Clock Timing Parameters
Parameter Description
TDM Bus Parameters
PCM Law Select
configure voip > media tdm >
pcm-law-select
[PCMLawSelect]
Determines 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 ALaw; T1
defaults to MuLaw. 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 PRI CAS protocols.
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.
TDM Bus Local Reference
configure voip > media tdm >
tdm-bus-local-reference
[TDMBusLocalReference]
Defines the physical Trunk ID from which the device recovers
(receives) its clock synchronization.
The range is 0 to the maximum number of Trunks. The default is
0.
Note: The parameter is applicable only if the parameter
TDMBusClockSource is set to 4 and the parameter
TDMBusPSTNAutoClockEnable is set to 0.
TDM Bus Enable Fallback
[TDMBusEnableFallback]
Defines the automatic fallback of the clock.

[0] Manual (default)

[1] Auto Non-Revertive

[2] Auto Revertive