CTC Union ERM-MUX User Manual Download

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Chapter 1 Introduction

E1 Line Backup Modes.

E1 module symmetry backup (Double Tx, One Rx to be selected)
For the 8E1card: E1A1+E1A5/ E1A2+E1A6/ E1A3+E1A7/ E1A4+E1A8;
For the 4E1 card: E1A1+E1A3/ E1A2+E1A4;
For the 2E1 card: E1A1+E1A2

5) System Clock Modes:

a)    E1A1's recovered clock: picked up from the E1A1 receive signal
b)    E1A2's recovered clock: picked up from the E1A2 receive signal (for the 2E1/4E1/8E1 card)
c)    E1A3's recovered clock: picked up from the E1A3 receive signal (for the 4E1/8E1 card)
d)    E1A4's recovered clock: picked up from the E1A4 receive signal (for the 4E1/8E1 card)
e)    E1A5's recovered clock: picked up from the E1A5 receive signal (for the 8E1 card)
f)    E1A6's recovered clock: picked up from the E1A6 receive signal (for the 8E1 card)
g)    E1A7's recovered clock: picked up from the E1A7 receive signal (for the 8E1 card)
h)    E1A8's recovered clock: picked up from the E1A8 receive signal (for the 8E1 card)
i)    Internal crystal clock
j)    G.703 Ext. clock (when this clock is enabled the internal crystal clock will be used for backup).
k)    I/O clock: The timing is locked to the appointed IO Card's CH1 ETC-CLOCK. The I/O modules that support this
function are: N64K/V35 module, G703-64K module and A/SYNC-128K module

6) Time slot 0 pass through function (Sa bit 0-4)

7) E1 circuit diagnostic loop back:

a) Local Loop
b) To Remote Loop
c) Bidirectional Loop

8) Performance and BERT test

a) System supports performance monitoring and BERT test through NMP or Terminal console according RFC 1406
recommendation
b) System supports CRC-4 and BPV monitoring: CURR ES / UAS , LONG ES / UAS
c) System supports Loopback test and BERT test: display Rx error amounts, Error counts and Bit-error-rate
d) System provides test patterns: 2e9-1, 2e11-1 and 2e15-1
e) System provides Error Insertions and rates: Single, 10e-1, 10e-2, 10e-3, 10e-4, 10e-5, 10e-6, 10e-7.

1.1.4. N64K/V35 Line Card

Each card contains four Nx64K high-speed data interfaces where. N=1 ~ 31 for data rates 64K to 1984Kbps in DCE mode.

1.1.5 A/SYNC-128K Line Card

Each card contains six up to 38.4K data rate for Asynchronous data interfaces, or six 64K/128K sync data interfaces.

1.1.6 G703-64K Line Card

Each card contains four G703-64K Co-directional, contra-directional or centra-directional data interfaces.

1.1.7 FXS Line Card

Each card has 6 FXS ports, for connecting directly to telephone and also with the ability to establish the connection between
telephone and FXO card for regular telephone to exchange or direct hot-line (FXS-FXS) applications.
Two modes are provided:

Normal mode: Supports End-to-End of E1 link status monitoring
Backup mode: see Appendix H for further information

1.1.8 FXO Line Card

Each card has 6 FXO ports, for connecting to PBX switchboard. The system manager can create a connection between FXO
and FXS card. Caller ID number is supported. The backup function is set by jumpers inside the FXS / FXO card.

Normal mode: Supports End-to-End of E1 link status monitoring
Backup mode: see Appendix H for further information