– The interconnection signal cable between the WBBPf boards in two BBUs must be a
QSFP cable.
NOTE
l Single-mode optical modules are labeled as SM and multimode optical modules are labeled as
MM.
l The puller of a single-mode optical module is blue. The puller of a multimode optical module is
black or gray.
l Figure 11-31 shows the label on an optical module.
Figure 11-31 Label on an optical module
(1) Maximum rate
(2) Wavelength (3) Transmission mode
Context
Table 11-2 lists the interconnection modes of two BBUs and the ports to which the inter-BBU
signal cable is connected. For details about the BBU interconnection, see Inter-BBU Signal
Cable Connections.
Table 11-2 Ports to which the inter-BBU signal cable is connected
Interconnection
Mode
Installation Position
BBU0 Side BBU1 Side
UCIU+UCIU M0 port on the UCIU S0 port on the UCIU
UCIU+UMPT M0 port on the UCIU CI port on the upper UMPT
M1 port on the UCIU CI port on the lower UMPT
HEI port on the WBBPf HEI port on the WBBPf
NOTE
l BBU0 is the root BBU. BBU1 is the leaf BBU.
l A 2 m inter-BBU signal cable is recommended if the distance between BBU0 and BBU1 is shorter than 2
m.
l A 10 m inter-BBU signal cable is recommended when the distance between BBU0 and BBU1 ranges from
2 m to 10 m.
l The optical modules to be installed must match the rates of their corresponding ports.
BTS3900L (Ver.C)
Installation Guide
11 Installing the Cables
Issue 07 (2013-11-08) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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