Specifications

IPmux-1/1E Installation and Operation Manual Chapter 1 Introduction

Functional Description 1-11

Fractional with CAS

In the fractional-with-CAS mode, the structure block (as described under

Fractional Operation Modes, above) also includes Channel Associated Signaling

(CAS). The relevant portion of the signaling channel is packetized and sent to the

destination.

Use Fractional with CAS mode when grooming FXS/FXO/E&M channels from a

remote IPmux-1E unit.

ISDN BRI

The section describes the IPmux-1E ISDN BRI S-interface operation modes, which

are:

• TE mode

• NT mode.

The selected mode applies to all 4 channels. The NT or TE mode is determined by

phantom feeding and software setting, which is enabled/disabled by jumpers

located on the ISDN BRI card (see Chapter 2).

TE Mode

All four channels are configured in TE (Terminal Equipment) as defined in I.430.

NT Mode

All four channels are configured in NT (Network Termination) as defined in I.430.

TE Deactivation is not used in NT mode, and Layer 1 is always in active.

If the jumpers enable phantom feeding, the TE mode cannot be selected as the

IPmux-1E operation mode. If phantom feeding is disabled, both NT and TE are valid

options.

FXS/FXO/E&M

The section describes the FXS/FXO/E&M operation modes, which are:

• E1 mode

• T1-D4 mode

• T1 ESF mode.

The IPmux-1E FXS/FXO/E&M operation modes allow IPmux to work opposite E1,

T1-D4, or T1-ESF. Two parameters are set internally when choosing one of the

options:

• A-Law/µ-Law

 A-Law when E1 mode is selected

 µ-Law is used in PCM CODEC when T1 (D4 or ESF) is selected.

• E1, T1-D4, and T1-ESF with CAS are structured differently in the TDM ↔IP

interworking function. A different structure must be used when working

opposite each one.

Note