Motorola T1/E1 用户手册
Canopy T1/E1 Multiplexer
September 2004
T1/E1 Multiplexer FPGA Version 3.4
Page 17 of 73
Table 8: E1 framing specifications
Specification
Description
Compliance ITU-T
G.703
Framing transparent
Signaling transparent
Table 9: Local terminal and control interface specifications
Specification
Description
Type
RS-232 via DB-9 Female Connector
Mode DTE
Baud Rate
19.2 kbps
1.3 CONFIGURATION SETTINGS FROM CANOPY FACTORY
1.3.1 Bit Handling Capability
As shipped, Canopy T1/E1 Multiplexers transparently pass all T1 or E1 bits regardless of
◦
user framing as
− D4
− Extended Superframe (ESF)
− D4
− Extended Superframe (ESF)
◦
user encoding as
− AMI
− B8ZS
− HDB3
− AMI
− B8ZS
− HDB3
However, user encoding is helpful for generating meaningful bipolar variation (BPV) data.
Canopy T1/E1 Multiplexers are factory preset to the B8ZS encoding for T1, though easily
changed to another encoding scheme, and are preset as master or slave for timing.
Canopy T1/E1 Multiplexers are factory preset to the B8ZS encoding for T1, though easily
changed to another encoding scheme, and are preset as master or slave for timing.
NOTE: To receive the highest level of performance from these units, the user should
understand
understand
◦
clock recovery timing.
◦
packet/frame loss concepts.
◦
delay and latency.
◦ jitter.
Issue 3