Lucent Technologies MERLIN LEGEND Release 5.0 System Planning Manual page 235

MERLIN LEGEND Communications System Release 5.0
System Planning 555-650-112
5 Data Communications
Assigning Lines/Trunks to Data and Video Stations
A DS1 facility provides either T1 (including T1 Switched 56 for digital
data/video calls) or PRI access:
The 100D module supports any combination of the following AT&T
Switched Network services:
In Release 4.2 and later systems, these MCI services are also available:
— T1 (factory setting). The 24 channels on a T1 facility can be
programmed individually in any combination to emulate a loop-start,
ground-start, E&M tie, DID, or Switched 56 digital data trunk, so a
single 100D module can replace 24 outside lines/trunks. When T1
Switched 56 service is used, high-speed video connections at data
rates of 56-kbps per channel (112-kbps for 2B Data) are possible.
— PRI. The standard format for ISDN services provided by connection
to a 5ESS central office (CO) switch or a 4ESS or DEFINITY toll
switch. PRI facilities provide several benefits, including increased
speed of data calls to an outside destination, INFO-2 automatic call
identification (ANI) service, dynamic B-channel assignment,
improved toll restriction, reliable indication of far-end disconnect,
and improved SMDR. Twenty-three channels can be programmed
for individual services (Channel 24 is reserved for signaling
purposes). PRI facilities may also be used for high-speed video calls
at data rates of up to 64-kbps per B-channel (128-kbps total for 2B
Data).
— ACCUNET Switched Digital Service for 56-kbps and 64-kbps
restricted and 64-kbps clear (unrestricted) circuit-switched data calls
(PRI only)
— ACCUNET Switched 56 Service for 56-kbps (restricted or
unrestricted) data calls (T1 only)
— Megacom 800 for incoming domestic toll-free voice calls
— Megacom WATS service for outgoing domestic long-distance voice
calls
— Software-Defined Network (SDN) for circuit-switched voice and data
calls at up to 56 kbps
— MCI PRISM
— MCI Vnet
— MCI 800
— MCI 900
Issue 1
June 1997
Page 5-29