DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506 Issue 1
April 2000
Features and technical reference
1399ISDN service
20
Private network services
In addition to providing access to switched-public networks, ISDN provides
private-network services by connecting DEFINITY ECS in an Electronic Tandem
Network (ETN), Distributed Communications System (DCS), or QSIG Network.
This gives you more efficient private networks that support new integrated voice
and data services. ETN, DCS, and QSIG networking services are provided as
follows.
ETN services
DEFINITY Enterprise Communication Servers that function as tandem nodes in
an ETN can be interconnected using DS1 trunking facilities with ISDN. All
signaling between the tandem switches is done with ISDN D-channel and normal
ISDN protocol. The ISDN can also be used to connect ETN tandem and main
switches. In this case, the main switch collects all of the address digits from local
users as well as users at other satellite and tributary switches, and originates a call
over ISDN to the tandem switch.
Figure Notes
1. ISDN trunk
2. SID/ANI
3. DEFINITY ECS
4. BX.25
5. ISDN Gateway
6. Existing interface
7. Host computer
8. Telephone
9. ACD agent position
10. Data terminal
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