Raisecom
RC3000-15 (P100R001) Hardware Description
7 PDH cards
Raisecom Proprietary and Confidential
Copyright © Raisecom Technology Co., Ltd.
54
7.1 8E1
7.1.1 Functions and appearance
Panel
Function
The 8E1, a service access card, supports 8 ways of E1 services. It
provides the following functions:
Provide 8 E1 electrical interfaces.
Adopt HDB3 coding for E1 which can be configured to PCM31,
PCM30, or unframed structure.
Support configuring E1 interfaces to balanced or unbalanced
interface through software. You can configure each E1 interface
individually.
Support main clock mode or link clock mode for E1 interfaces.
You can configure each E1 interface individually.
Support reporting LOS, LOF, AIS, CRC, E-3, E-6, LOMF, and
remote alarms.
Support local internal loopback and external loopback based on
E1 interface or 64K timeslot.
Support BERT for one-way E1 or one-way 64K timeslot.
Support signaling cross connection and transparent transmission
of the Sa bit.
Support adding and intelligently identifying of remote connected
devices.
Support adopting independent timeslot for the network
management channel in SA4 or SA5 mode.
Support disabling output of signaling bits. The chip automatically
generates control signals according to link alarms or is controlled
by software.
Support E1 channel protection and four E1 protection pairs (1/2,
3/4, 5/6, and 7/8).
Support LOS, LOF, AIS, and E-3 alarms as protection switching
triggers on the E1 interface. Whether the E-3 alarm triggers
protection switching is configurable and it can be configured to
0–15s.
Support automatic mode, manual mode, locked mode, and forced
mode for E1 interface protection.
Provide debugging and downloading interfaces which is
connected to the front panel through the same Mini USB
connector.