Lucent Technologies MERLIN LEGEND Release 6.1 Feature Reference page 730

MERLIN LEGEND Communications System Release 6.1
Feature Reference 555-661-110
Features
Tandem Switching
Automatic Route
Selection
Callback
CTI Link
Digital Data Calls
In Release 6.0 and later systems (Hybrid/PBX mode only), the ARS
access code is accepted over private networked trunks, allowing users in
a local system to make calls from lines/trunks connected to a remote
system. The system manager programs ARS in order to direct calls over
the most cost-effective routes; calls that are local, for example, at a
remote networked switch, can be sent out from lines/trunks connected to
that system. At the remote system, Remote Access features are used to
accept such a call.
Do not program a remote system's ARS access code into the local
system non-local dial plan. For example, if the ARS access code is 9, do
not include a range of extensions that begins with 9 . If you attempt to
program the local ARS access code into the non-local dial plan, the
system blocks the attempt. For security and convenience, it is best if all
systems in a network use the same ARS access code.
Because equal access (IXC or Interexchange) calls from a system with no
PSTN trunks require that local and remote ARS access codes match, the
local ARS access code is automatically prefixed when these calls are
sent to a networked system. You should not use this arrangement unless
networked systems are collocated. Otherwise, Dial 0 and Special Number
calls (911 calls, for example) do not reach the correct local services.
Callback queuing works for lines/trunks connected to the caller's local
system, including private network tandem trunks. When a call is sent
across the network and a non-local system's trunks are busy, the caller
cannot queue the call using Callback.
If a caller attempts Selective Callback upon hearing a busy tone and the
busy condition is not derived from the originating system, Selective
Callback has no effect. A caller can use Selective Callback to queue for
Route 1 when all local routes for a networked call are busy.
In Release 6.0 and later systems (Hybrid/PBX mode only), operation for
non-local dial plan extension calls, both incoming and outgoing, in
PassageWay Telephony Services applications depends upon the
application implementation as well as the type of private networked trunk
(PRI or tie) that carries calls. See "Non-Local Dial Plan Operation
(Release 6.0 and Later Systems Only)" for details.
In Release 6.0 and later systems (Hybrid/PBX mode only), digital data
calls between networked systems must travel over PRI tandem trunks or
T1-emulated tie data tandem trunks. 2B data is supported when two
B-channels or T1 channels are available. Digital data calls can take place
at 64- and 128-kbps data speeds over tandem PRI trunks that are routed
for data-only or voice/data operation. T1-emulated tie data tandem
facilities are UDP-routed for data only; 56- and 112-kbps data speeds are
supported on these facilities.
Issue 1
August 1998
Page 681