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Chapter 8. Configuring DBU Options
8-8 TSU IQ+ User Manual 61200275L1-1
B-Channel Bit Rate (B-CH BIT RATE)
Select the channel bit rate for the ISDN service. Select 64
K
unless
your service only provides 56
K
.
Number of B-Channels (NUM B-CHANNELS)
Select the number of B-channels supported by the ISDN service.
Select 2 if bonding is used.
SPID 1 and 2
Enter the service profile identifier (SPID) for both B-channels. The
SPID is a sequence of digits identifying ISDN terminal equipment
to the ISDN switch when more than one ISDN set has been
attached to the same central office line. The SPID is assigned by the
telco when the ISDN line is installed and normally resembles the
phone number.
Only the Lucent 5ESS switch is capable of recognizing a point-to-
point configuration, eliminating the need for a SPID. All other
switch types require a SPID.
LDN 1and 2
Enter the LDNs for both B-channels. The LDNs are assigned by the
telco when the ISDN line is installed.
CALL SCREENING
If C
ALL
S
CREENING
is set to E
NABLE
, the TSU IQ+ will only accept
incoming calls from the numbers entered in the NUMBER
1 through
N
UMBER
5 fields. Calls from any other number or from an
unidentifiable number are rejected (for BRI card only).
PRI Options
The PRI O
PTIONS
field is available when the PRI DBU card is
installed. The following options are available.