Advanced Pstn Configuration; Mediant 2000 Clock Settings; Isdn Overlap Dialing - AudioCodes Mediant 2000 User Manual

Mediant Series and TP-1610 H.323 User's Manual
10

Advanced PSTN Configuration

10.1 Mediant 2000 Clock Settings

The gateway can either generate its own timing signals, using an internal clock, or recover them
from one of the E1/T1 trunks.
a. To use the internal gateway clock source configure the following parameters:
•
TDMBusClockSource = 1
•
ClockMaster = 1 (for all gateway trunks)
b. To use the recovered clock option, configure the following parameters:
•
TDMBusClockSource = 4
•
ClockMaster_x = 0 (for all 'slave' gateway trunks connected to PBX#1)
•
ClockMaster_x = 1 (for all 'master' gateway trunks connected to PBX#2)
Assuming that the gateway recovers its internal clock from one of the 'slave' trunks connected to
PBX#1, and provides clock to PBX#2 on its 'master' trunks.
In addition it is necessary to define from which of the 'slave' trunks the gateway recovers its clock:
•
TDMBusPSTNAutoClockEnable = 1 (the gateway automatically selects one of the connected
'slave' trunks)
Or
•
TDMBusLocalReference = # (Trunk index: 0 to 7, default = 0)
Note 1:
Note 2:

10.2 ISDN Overlap Dialing

Overlap dialing is a dialing scheme used by several ISDN variants to send and / or receive called
number digits one right after the other (or several at a time). As opposed to the enbloc dialing
scheme in which a complete number is sent.
The Mediant 2000 can optionally support ISDN overlap dialing for incoming ISDN calls for the
entire gateway by setting 'ISDNRxOverlap' to 1, or per E1/T1 span by setting 'ISDNRxOverlap_x'
to 1 ('x' represents the number of the trunk, 0 to 7).
To play a Dial tone to the ISDN user side when an empty called number is received, set
'ISDNINCallsBehavior = 65536' (bit #16) causing the Progress Indicator to be included in the
SetupAck ISDN message.
The Mediant 2000 stops collecting digits (for ISDN IP calls) when:
•
The sending device transmits a 'sending complete' IE in the ISDN Setup or the following Info
messages to signal that no more digits are going to be sent.
•
The inter-digit timeout (configured by the parameter 'TimeBetweenDigits') expires. The
default for this timeout is 4 seconds.
Version 4.6
To configure the TDM Bus Clock Source parameters, refer to Section
page 91.
When the Mediant 2000 is used in a 'non-span' configuration, the internal
gateway clock must be used (as explained above).
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10. Advanced PSTN Configuration
5.6.4 on
July 2005