Networking Solutions
555-230-024
12-10 Issue 5 January 1998
Digital Interfaces
Lucent Technologies supports both T1 and E1 facilities. As industry s tandards
around the world, T1 and E1 facilities provide the latest alternative to analog
trunking.
E1 Interface
DEFINITY ECS also supports E1 connections. T1/E1 access and conversio n
allows simultaneous connection to both T1 (1.544 Mbps) and E1 (2.048 Mbps )
facilities (using separate circuit packs).
T1 Interfaces
When planning your networking requirements, one of the options you should con-
sider is multiplexing over Digital Se rvices 1 (DS1) facilities. As the ind ustry stan-
dard for interconnecting digital systems, DS1 is an econo mic alternative to
analog trunking arrangements. Multiplexing up to 24 digitized voice/data c om-
munications paths onto a single T1 carrier or other high-speed digital fac ility
(such as fibre or microwave) can reduce your network trunking and eq uipment
costs.
Used to connect switches to the public network or to othe r switches in a private
network, DS1 also delivers high-speed, end-to-end digital connectivity. Voice and
data calls are completed at transmission speeds of up to 6 4 kbps.
DEFINITY ECS offers several options in supporting the DS1 interface. The
options include support for voice-grade DS1, alternate voice/data, and Digi tal
Multiplexed Interface. The voice-grade DS1 interface is a T1 D4 chan -
nel-bank-compatible interface that does the following:
■Uses in-band bit-robbed signaling to provide 24 voice-grade-only tie
trunks consisting of 56-kbps channels for voice and voic e-grade data
transmission
■Interconnects DEFINITY ECS with other switches with an external D4
channel bank or with other switches (analog or digital) h aving the
appropriate interfaces
■Interconnects DEFINITY ECS with central offices such as Lucent
Technologies 4ESS switch (where services such as MEGACOM and
Software Defined Network can be accessed) and 5ESS switches
■Interconnects DEFINITY ECS with private networks by connection with
DS1 facilities
■Can be used with the same Automatic Alternate Routing capabilities as
normal analog E & M lead tie trunks