ADTRAN 1200218L1, Руководство пользователя

Страница: 90 / 122

Chapter 7. Applications
7-4 OSU 300 User Manual 61200663L1-1
FRACTIONAL T3 CARRIER APPLICATION
When network providers want to provide service at rates less than
full T3, OSU 300 units can be used in pairs for deploying sub-T3
rate services.
In this application example (shown in Figure 7-3 on page 7-5), 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 OSU 300s via SNMP. Table 7-3 on page 7-5 gives an example
configuration for this application.
Nx75k blocks - 20 Nx75k blocks - 20
System
Management Local IP Address - 10.4.10.2 Nothing required. Remote unit
can be managed using the lo-
cal OSU 300.
Subnet Mask - 255.255.255.0
Gateway IP Address -
10.4.10.1
IP Security - Disabled
Trap IP Address - 10.4.10.10
Management Port - LAN
Table 7-2. Multiport Application Configuration Example (Continued)
Local OSU 300 Remote OSU 300
While in DTE loopback, data from the host is transmitted into the net-
work.