Fractional T3 Carrier Application; Figure 7-3. Fractional Application - ADTRAN T3SU 300 User Manual

FRACTIONAL T3 CARRIER APPLICATION

When network providers want to provide service at rates less than
full T3, T3SU 300 units can be used in pairs for deploying sub-T3
rate services.
In this application example (shown in Figure 7-3), a carrier provides
fractional T3 access at 8 Mbps for internet connectivity. The data
connection can be either V.35 or HSSI at either location. This
network uses a HSSI port at the carrier's internet POP (point of
presence) and a high-speed V.35 connection at the customer's
router. The carrier manages both the local and remote T3SU 300s
via SNMP. Table 7-3 gives an example configuration for this
application.
While in DTE Loopback, data from the host is transmitted into the net-
work.
Carrier
Internet
Access
CONTROL
REMOTE
ACTIVE
61200217L1-1
Router
HSSI
8 Mbps
T3
T3SU 300
IN SERVICE
IN SERVICE IN SERVICE
IN TEST IN SERVICE IN SERVICE
IN TEST
ALARM IN TEST IN TEST
ALARM IN TEST
LOS ALARM ALARM
NETWORK LOS ALARM
DTE PORT 1 LOS LOS
DTE PORT 2 DTE PORT 3 LOS DTE PORT 4
T3SU 300
T3SU 300 User Manual
T3
Dedicated
Network

Figure 7-3. Fractional Application

Chapter 7. Applications
Router
V.35
8 Mbps
T3SU 300
CONTROL
REMOTE IN SERVICE
ACTIVE IN SERVICE IN SERVICE
IN TEST IN SERVICE IN SERVICE
IN TEST
ALARM IN TEST IN TEST
ALARM IN TEST
LOS ALARM ALARM
NETWORK LOS ALARM
DTE PORT 1 LOS LOS
DTE PORT 2 DTE PORT 3 LOS DTE PORT 4
T3SU 300
7-5