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Clocking modes 59
Model 3088A Series Getting Started Guide B • Specifications
Clocking modes
Internal, external, or receive recovered
DTE rate
All 64k steps from 64 to 5696 kbps
Serial interface
RS-232 (Model 3088A/A), DCE/DTE selectable
V.35 (Model 3088A/CA), DCE/DTE selectable
X.21 (Model 3088A/D), DCE/DTE selectable
E1 (Model 3088A/K) presents G.703/G.704 interface. Either 75 Ohms (unbalanced) or 120 Ohms (bal-
anced). Pins 1 & 2 are Receive. Pins 4 & 5 are Transmit.
Serial connector
D-Sub-25 Female (Model 3088A/A and Model 3088A/CA)
D-Sub-15 Female (Model 3088A/D)
Dual BNC and RJ48C (Model 3088A/K), strap selectable
Diagnostics
V.52 compliant (511) pattern generator and detector with error injection mode controlled by front-panel
switch. Local and Remote Loopback control either by a front-panel switch or from the DTE interface.
Status LEDs
Power (Green)
The Power LED glows solid during normal operation. At startup, during the POST, the LED blinks once
every second. If the POST fails, the unit does not enter normal operation, and the LED blinks once every
0.4 seconds.
DSL (Green)
The DSL LED glows solid while a DSL link is established. While the DSL link is training it blinks once every
second.
Link (Green) (E1 only)
Solid green indicates valid E1 framing. Flashing indicates signal being received, but the link has not yet been
established.