Instruction manual

DEFINITY® Business Communications System and GuestWorks® Issue 6
Overview
555-231-208
Issue 1
April 2000
Features
A-52Trunk Group features
A
ISDN provides end-to-end digital connectivity and uses a high-speed interface
which provides service-independent access to switched services. Through
internationally-accepted standard interfaces, ISDN provides circuit or
packet-switched connectivity within a network and can link to other
ISDN-supported interfaces to provide national and international digital
connectivity.
ISDN Restriction Presentation
Restricts the display of calling/connected numbers over ISDN trunks. ISDN trunk
groups can be administered to control the display of calling/connected numbers.
Each trunk group can be administered to display “Presentation restricted,”
“Number no available due to networking,” or an administered text string instead of
the calling/connected number.
Layer 1 Deactivation
Tells call processing and maintenance software whether to expect the network to
drop Layer 1 when the BRI port is idle. When acting as the TE side, the switch
supports the case where the network deactivates Layer 1 when both B-channels
of a BRI port are idle. When acting as the NT side, the switch deactivates Layer 1
only when the BRI port is busied out.
Multiple Public Network Calling/Connected
Numbers/System
Allows multiple calling/connected numbers to be administered for trunks
associated with different network providers. This ensures that the proper
calling/connected numbers are sent out based on the trunks used.
Multiple Subscriber Number - Limited
Lets customers assign multiple extensions to a single BRI endpoint. The Multiple
Subscriber Number (MSN) feature works with BRI end points that allow the
Channel ID information element to be encoded as “preferred.”
NT Interface on TN556C
Support for the NT (network) side of the T interface has been added using the
TN556C circuit pack. This gives full tie trunk capability using BRI trunks. The
system supports leased BRI connections through the public network, with a
TN2185 circuit pack on each end of the leased connection. The system will not,
however, allow customers to administer both the endpoints and the trunks on the
same TN556C circuit pack.