Motorola 68230 - Vanguard 300 DSU/CSU Operator's Manual page 11

One Async port used for control port:
§ Vanguard 300: DECconnect connector
§ Vanguard 305: RJ45 connector
Two MB FLASH, four MB DRAM
See Figure 1-4 for a view of the Vanguard 300/305 rear panel.
Motherboard
The motherboard supports up to three serial interfaces.
Serial Ports
The Vanguard 300/305 is available with one or two serial ports, plus an optional
third port for a daughtercard option (DSU, V.35 DIM site card, etc.). You can also
use the optional port for dial backup or as a second user port. See "Port
Characteristics" in this section for more details.
Vanguard 300 Ethernet Port
On the Vanguard 300, one port is a LAN port configured for Ethernet AUI and
10BaseT interfaces. Strapping is required during installation to configure the unit
for AUI or 10BaseT operation. The default configuration, shipped from the
factory, is 10BaseT.
Vanguard 305 Token Ring Port
On the Vanguard 305, one port is a LAN port configured for a Token Ring
connection. There are connectors for both shielded (STP) and unshielded (UTP)
cables, but only one cable can be connected at any time. No strapping is required
during installation to configure the unit as the port will automatically configure
for the connected interface.
The following table describes the port characteristics for the Vanguard 300/305.
Port Connector
No.
1 DB25
connector for
V.24, V.35,
V.36, V.11
RJ48S
connector for
DSU
Interface Default
DIM Site Frame
Daughtercard Relay
DSU
Daughtercard
Speed DTE/DCE
See Port 2 DIM Card
for DIM -Selectable
speeds
DSU Sync DCE
speed is 56
DSU -
kbps
NA