Cisco ISE - Line Card ISE Bedienungsanleitung PDF herunterladen (Seite 16)

Cisco IOS SoftwareConfiguration for theCisco 12000 SeriesOne-Port Channelized OC-12/STM-4(DS1/E1) ISE Line

How to Configure Layer 1 Features

Cisco IOS Release 12.0(27)S1

Configuring a T1 in SONET CT3 Mode

The CT3 mode is the default mode for STS-1 with SONET framing

Summary Steps

1. t1 t1-line-number channel-group channel-group-number timeslots list-of-timeslots [speed {56 |

64}]

2. t1 t1-line-number framing {esf | sf [hdlc-idle {0x7E | 0xFF}]}

3. t1 t 1-line-number clock source {internal | line}

Step 2

vtg

vtg-number

t1-line-number

framing {esf | sf

[hdlc-idle {0x7E | 0xFF}]}

Example:

Router(config-crtlr-sts1)# vtg 1 t1 1 framing esf

Specifies the T1 framing format.

The default framing format is Extended Super

Frame (ESF). Super Frame (SF) format offers the

hdlc-idle option, which can be set to use either

0x7E or 0xFF as the HDLC idle pattern.

Note When you select SF framing, consider

using the no t1-line-number yellow

detection command to turn off yellow

alarm detection, because the yellow alarm

can be incorrectly detected with SF

framing.

Step 3

vtg

vtg-number

t1-line-number

clock source

{internal | line}

Example:

Router(config-crtlr-sts1)# vtg 1 t1 1 clock source

line

Sets the internal or line (network) clock source.

The value of n depends on the mode of operation

selected: In ct3 mode, n = 28; in vt-15 mode,n=4.

Defines the clock source for the T1 line. The

default clock source is internal.

Defines the clock source for the T1 line. The

default clock source is internal.

Command Purpose

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 57 58

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