Technical Specifications - Huawei S7700 Hardware Description

S7700 Smart Routing Switch
Hardware Description
l

5.2.6 Technical Specifications

Table 5-13
Issue 02 (2012-09-10)
Attribute Description
Compliance RS-232
standard
Data equipment Data Circuit-terminating Equipment (DCE)
type
Table 5-12 describes the attributes of the BITS interfaces.
Table 5-12 Attributes of the BITS interfaces
Attribute Description
Connector type RJ45
Operation mode Clock synchronization mode: full duplex
Time synchronization mode: half duplex
Frame format l 1 pps + Time of Day (TOD)
l DC Level Shifter (DCLS)
l 2 MHz
l 2 Mbit/s: HDB3 code
l 1.544 Mbit/s: B8ZS code
Compliance l 1 pps + TOD
standard
l DCLS: standard of DCLS signals
l 2 MHz: G.703 standard
l 2 Mbit/s: G.703 standard
l 1.544 Mbit/s: G.703 standard
Cable Time synchronization mode: time synchronization network cable,
which is a common straight-through network cable with the RS422
interface level
Clock synchronization mode: E1/T1 cable, which is a balanced cable
with an impedance of 120 ohms.
For details about cable, refer to
describes the technical specifications of the SRU.
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– NMEA-0183
– TOD standard of China Mobile
6.7 Clock Cable.
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