CTC Union ETU01-D, Руководство пользователя

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Chapter 1 Introduction
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1.5 ETU01-D Capabilities
E1 link line coding
The ETU01-D supports two E1 line codes:
AMI coding.
HDB3 coding.
E1 framing formats
The ETU01-D supports three formats:
Unframed format. (in Unframed, only Data port 1 is supported)
FAS (CCS, PCM-31) format. (TS0 reserved)
MFAS (CAS, PCM-30) format. (TS0 and TS16 reserved)
User data channel rates
The ETU01-D supports each user data channel rates which are a multiple of
64kbps. For maximum flexibility, the ETU01-D supports combined data rates up to
2.048Mbps.The ETU01-D supports flexible time slot assignment, allowing the user
to freely specify the selection of time slots, in sequence or randomly, for each data
channel.
User data channel interface
The ETU01-D has a single user data channel interface and it is a fixed type of
user data channel interface: V.35.
System Timing Considerations
The ETU01-D has the flexibility to meet the timing requirements of various
system configurations. The timing mode for the E1 link and for the user channel are
selected by the setting of configuration data via the front panel LCD display.
E1 link timing
The ETU01-D E1 link receive path always operates on the receive clock. The
ETU01-D recovers the receive clock from the received E1 link data signal. The
source of the ETU01-D E1 link transmit clock can be selected by the user.