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HCD-E1 Installation & Operation Manual Chapter 1 - Introduction
01/01/01 08:07 Technical Specifications 1-27
E1 Sublink
Receive Timing
Always recovered from the E1 sublink receive
data signal
Transmit Timing
(user-selectable)
Follows the transmit timing of the HDSL link.
Synchronous Data
Channels
- DCE timing mode: HCD-E1 data channel
provides transmit and receive clocks for the
DTE connected to the data port.
- DTE1 timing mode: HCD-E1 data channel
sends the receive data accompanied by the
receive clock, derived from the main system
clock, to the DTE connected to the data
port, and accepts data from DTE according
to the DTE transmit clock.
- DTE2 timing mode: HCD-E1 data channel
transmits and receives data according to the
clock signals provided by the equipment
connected to the data port. (not available on
channels with X.21 interface).
Supervisory Port
Interface
V.24/ RS-232, asynchronous DCE interface for
direct connection of control terminal or
dial-up modem
Data Rate
300, 1200, 2400, 4800, 9600 bps, with
Autobaud option
Word Format
- One start bit
- 7 or 8 data bits
- Parity: none, odd, or even
- One stop bit
Connector
9-pin D-type, female
Alarm Relay
Function
Floating pair of NO and NC contacts
Contact Ratings
Open-circuit: maximum 60 VDC
Short-circuit: maximum 0.25A
Physical
Depth
243 mm / 9.5 in
Width
215 mm / 8.5 in
Height
43.7 mm / 1.75 in (1 U)
Weight
1.5 kg / 3.5 lb