Specifications

Chapter 6: Programming
Configuring a Single-Port/Dual-Port T1/E1/PRI Module (T1M/T1M-2)
Mitel
®
5000 Installation Manual – Issue 3.0, October 2008 Page 6-127
Overlap Sending
(Applies only to E1/PRI equipped modules) If using a PRI-equipped module with PRI Net 5, you
can program the system to use the overlap sending and receiving protocols. These protocols
allow you to program the switch to send called number digits either in the setup message or the
information message.
To access the programming options:
1. Double-click Overlap Sending.
2. Program either of the following options:
• Immediate Overlap Sending: Enable this flag to have the system immediately
send the setup message to the network provider. If disabled, all called number
digits are collected before sending the setup message to the network provider. You
should enable this flag if you want the system to seize a B-channel immediately or
if you want the network provider to provide immediate feedback for invalid
numbers. You should disable this flag if the network provider does not support
overlap receiving. By default, this flag is disabled.
• Maximum Digits in Called Number IE: Select the maximum number of called
number digits that the system will include in the setup and/or information
messages. This field may be required if the network provider only allows calls with
a specified number of maximum digits. The number of digits programmed here and
the Overlap Sending Conditions value determine the number of called number
digits sent in the called number information elements (IE) for setup and information
messages. The valid range is 1–48, and the default is 20.
• Overlap Receiving: Enable this flag if the network provider does not send digits
“en bloc” to the system. If enabled, the system will not route the call until it has
received a sending complete indication from the network provider or until the
Overlap Receiving Timeout Timer has expired (below). You should enable this flag
if the network provider sends any called number digits in subsequent information
messages. You should disable this flag if the network provider sends all of the
called number digits in the setup message (“en bloc”). By default, this is disabled.
• Overlap Receiving Timeout Timer: Select the number of seconds that the system
will wait to receive any called number digits from the network provider. You may
need to adjust this value if the network provider does not send a sending complete
indication to signal the end of the called number digits. The valid range is 1–255,
and the default is 30 seconds.
NOTE
Because Automatic Route Selection (ARS) calls require the system to
collect digits before determining the most cost-effective route, this flag
is ignored for ARS calls.
NOTE If the Immediate Overlap Sending flag is enabled, this field is ignored.