Northern UTA220/UTA220k - Manual (Page 38)

4-4
UTA220/UTA220k
ISDN
AT&T switches define Single Term and Multiple Term modes
of operation for the TA. AT&T switches support Point-to-
Point, Multi-Point services and NI operation depending on the
software version loaded in the switch. The switch can also
operate in custom mode to support modes other than the
default. Table 4-1 shows AT&T switch versions, supported
modes, and default modes.
When you set the TA for Point-To-Point switch operation, it
runs in the single term mode and only one TA may be attached.
Because only one TA is attached, Service Profile Identifiers
(SPIDs) and Directory Numbers (DNs) are not needed to
identify the TA. This is called non-initializing mode. This
mode functions on a multi-point switch; however, the switch
requires the TA to present its DN when it makes calls to
distinguish it from other TAs on the line. Thus the DN must
be properly configured in the TA in this instance.
Normally on a multi-point line, you configure the TA for
multi-point operation. This causes the TA to run in the
multi-terminal-initializing mode; SPID numbers are required.
To configure the TA for NI1 operation, select NI1 as the switch
type.
Note: If you are using BONDING with the secondary call port,
the DN must be entered so that it can be provided to the remote
TA.
Table 4-1: AT&T Switch Modes
Switch Version Default Mode Custom Mode
5E4.2 Point-to-Point None
5E5 Multi-Point Point-to-Point
5E6 Multi-Point Point-to-Point
5E7 Multi-Point Point-to-Point
5E8 NI1 Point-to-Point
and Multi-Point
5E9 NI1 Point-to-Point
and Multi-Point