H3C Technologies H3C MSR 50 - Manual (Page 736)

351
Item Description
ISDN Timeslot Management
Configure local ISDN B channel management.
• Disable—Local ISDN B channel management is disabled and is in the
charge of ISDN switch.
• Common management—The device operates in local B channel
management mode to select available B channels for calls. However, the
ISDN switch still has a higher priority in B channel selection. If a locally
selected B channel is different from that selected by the ISDN switch, the
one indicated by the ISDN switch is used for communication.
• Forced management—The device operates in forced local B channel
management mode. In this mode, the device indicates in the Channel ID
information element of a call Setup message that the local B channel is
mandatory and unchangeable. If the ISDN switch indicates a B channel
different from the local one, the call fails.
By default, the local ISDN B channel management is not enabled but is in the
charge of ISDN switch.
It is very important to put appropriate control on the B channels used for calls
in process, especially in PRI mode. Proper channel management can improve
call efficiency and reduce call loss. Generally, the centralized B channel
management provided by exchanges can work well. For this reason, you are
recommended to adopt the management function provided by exchanges in
most cases, despite that the ISDN module can provide the channel
management function as well.
ISDN Timeslot Order
Set a B channel selection method:
• Ascending order—Select B channels in ascending order.
• Descending order—Select B channels in descending order.
When operating in B channel local management mode, the device selects B
channels in ascending order by default.
When the exchange manages B channel, these options take no effect. If you
select the Disable option in the ISDN Timeslot Management area, these
options take no effect.
ISDN Overlap-Sending • Enable—Set the ISDN interface to send the called number in overlap
mode. In this mode, the digits of each called number are sent separately
and the maximum number of the digits sent each time can be set.
• Disable—Set the ISDN interface to send the called number in full-sending
mode. In this mode, all the digits of each called number are collected and
sent at a time.
By default, the ISDN interface sends the called number in full-sending mode.
Max Number of Digits that
Can Be sent Each Time
Progress-to-Alerting
Conversion
• Enable—Enable the ISDN interface to convert received Progress messages
into Alerting messages.
• Disable—Disable the progress-to-alerting conversion function.
This option just takes effects on messages received on an ISDN interface.