Comtest-networks MTAS-192 METALLIC TEST ACCESS SYSTEM Instrukcja Użytkownika Pobierz pdf (Strona 16)

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CT-IG-MTAS192-2008-v1_8.doc

MTAS-192

Installation Guide June 2006

Each splitter card has five (5) modes, which are explained below.

Table 6: Splitter Card Modes

Mode Description TL1 Command

Transparent/

Isolated

In this mode, all test connections are

released. This is the default mode.

DISC-TACC

Loop-around

In this mode, the AF and AE sides of a

TAP are looped back at the line card.

CONN-LPACC-MET

High-impedance

Monitor

This mode uses the AF portion of the TAP

bus and performs a hitless connection to

provide access for monitoring.

CONN-TACC-MET

Bridged Monitor

This mode connects the AF pair directly to

the circuit under test.

CONN-MON

Split

Split Mode access breaks the cable pair to

be tested in two directions, one provided

by AF (towards the customer) and AE

(towards the equipment).

CHG-SPLIT

Figure 10: Transparent/Isolation Mode

TL1 commands are explained in the MTAS-192 User Guide.

Facility Side (F)

(Downstream)

Equipment Side (E)

(Upstream)

PSTN

Class 5

DSLAM

Splitter

MTAU (MTAS-192)

Rin

–

Wire Circuit

ccess Point

RTU (Test Head)

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 71 72

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