User`s guide

XSR User’s Guide 195
Chapter 9 ISDN Configuration
Configuring Integrated Services Digital Network (ISDN)
ISDN Configuration
PRI interfaces share the T1/E1 NIM card and all physical configuration
values the controller can configure. The
pri-group command assigns the
channels (DS0s) of the T1/E1 port to ISDN module control. Interfaces are
configured one of two ways using the following commands:
 The
pri-group command ISDN switching.
 The
channel-group command for point-to-point connections.
The above commands are mutually exclusive: you can enter one or the other
per PRI interface, not both. On the E1 NIM, 30 channels are controlled by
ISDN, and 23 channels on the T1 NIM. Other PRI commands include:

bchan-number-order selects a channel from B1 (ascending) or
B23/B32 (descending).

calling-number configures an outgoing ISDN calling number.

switch-type specifies the Central Office ISDN switch type.
BRI interfaces utilize a BRI-S/T or UNIM card. From a software perspective,
S/T and U cards are equivalent and all features supported on both cards are
equivalent. The card type is significant during installation only. In North
America, the U card is connected directly to the ISDN service jack, the S/T
card requires an external NT1 device to be connected between the S/T card
and the service jack. Outside North America, only the S/T card is used with
very few exceptions.
The two basic modes of operation of the BRI card are: CMD switched mode
and leased line (permanent) mode. Leased line mode is configured similar to
T1/E1 channelized operation mode - commands are entered at Controller
configuration mode. BRI ISDN commands include:

answer1/2 adds a called number:subaddress to be screened.

calling-number adds a calling number included in outgoing calls.

spid1/2 sets a Service Profile ID string calling-number: subaddress.

switch-type selects the interface ISDN switch type.

leased-line sets a BRI interface to support leased lines.