Configuring T1/E1 Bearer Profiles (Software 10.5.0 and above)

Topic Location: Configuration > T1/E1

Overview:

On the rear of the IMG are ports that are designated to be configured for TDM spans. There are 28 Bearer ports and four Signaling/Timing Ports. Each port in considered a span. Each span needs to have a profile associated with it to identify parameters such as Signaling, Framing, etc. The IMG will allow 64 T1 and 64 E1 profiles to be configured.  How to configure a profile for each span is shown below.

Configure TDM Profiles

1. Right-click on IMG EMS and select New Profiles. A Profiles Object will get created. Commit this.

2. Right-click Profiles and select either New T1 Profile or New E1 Profile. A screen like the following will appear.

3. Use the drop down menus to configure the E1 or T1 profile. See T1 and E1 Profile panes below

T1 Profile Pane:

T1 Field Descriptions:

Name

A name entered that describes the profile being created

Framing

Specifies whether the framing of the span is ESF or D4.

• ESF

• D4

Signaling

• Clear Channel

• CAS

Line Length

Specifies the length of the T1 line:

• 0-133 ft

• 134-166 ft

• 167-299 ft

• 300-533 ft

• 534-655 ft

NOTE: In SNMP, the first value in the range is returned, in meters, as shown below:

Line Coding

Specifies the line coding of T1 span. For T1 SS7 links with line coding configured for B7ZS, only the 48 Kbps data rates are valid.  (configured in the SS7 Link pane)

• AMI

• Bit 7 zero suppressing

• B8ZS zero suppressing

Monitoring Fields

Span Status

This monitoring field indicates the current status of the span.

Button Descriptions

In Service

This button will bring the T1 span in service.

NOTE: You must manually bring a span back in service following a loopback test.

Out Of Service

This button takes the T1 span out of service.

E1 Profile Pane

E1 Field Descriptions:

Loop Timing Type

Specifies whether that specific span is used for primary loop timing, secondary loop timing or not.

• Primary

• Secondary

• Not Timing Source

Coding Method

Specifies the line coding of that specific span:

• AMI

• HDB3

Enable CRC4 (Cyclic Redundancy Check)

Used in E1 trunk lines which is a method of checking for errors in transmitted data. Specify using drop down menu whether CRC4 error checking is enabled or disabled:

• True

• False

Enable FEBE ( Far End Block errors Count)

FEBE is used to indicate framing or CP bit parity errors from the transmitter. Specify using drop down menu whether FEBE is enabled or disabled:

• True

• False

Line Impedance

Specifies whether the E1 interface is 75 ohm or 120 ohm.

• G.703 ITU-T (75 ohm)

• G.703 ITU-T (120 ohm)

Signaling Method

• Clear Channel  (Set this for SS7 and ISDN spans.)

• CAS (Set this for CAS spans.)

Layer 1 Management

• E1 Layer 1 Mgmt

• Euro-ISDN E1 Layer 1 Mgmt

• Austel-ISDM E1 Layer 1 Mgmt

Transmit All Zeros

Specifies whether transmit all zeros is enabled or disabled.

• True

• False

Loopback Mode

Bearer or Signaling DS1’s can be configured for local or remote loopback. Each span offset must be individually configured.

• No Loopback

• Local Loopback

• Remote Loopback

•  

NOTE: When you place a span in loopback mode the Span Status will indicate Out Of Service. Following the test you must manually put the span back in service by selecting the In Service button.

See Loopback Testing for more information.

Monitoring Fields

Span Status

This monitoring field indicates the current status of the E1 span.

Buttons

In Service

This button brings the E1 span in service.

NOTE: You must manually bring a span back in service following a loopback test.

Out Of Service

This spans takes the E1 span out of service.

Default E1 Format

The table below shows the default format for E1 spans. You must enable Clear Channel signaling to use timeslot 16 as a voice channel for out-of-band signaling (for example, an ISDN application).

NOTE: Clear Channel signaling must be enabled to use timeslot 16 as a D channel in ISDN applications.

NOTE: For CAS, channel 16 will appear as Out of Service.

4. Once an E1 or T1 profile has been created then the profile will need to be associated with a particular span or group of spans. Configure a T1 or E1 span. See Configuring T1_E1_BearerSpans or Configuring T1_E1 Signaling Spans

5. Once the spans have been created then the profiles created can be configured for a specific span or group of spans. See screen capture below

Next Topic

Configuring_T1_E1_BearerSpans

Configuring_T1_E1_SignalingSpans

If configuring DS3 see

DS3_Physical_Span_Conf - 10.5.x