Zyxel IES-1000 EE [29/368] Analog modem pass through

Chapter 1 Introducing the VOP

VOP1224-61 User’s Guide

Call Progress Tones

The VOP can provide the following tones to connected telephones:

Numbering Plan

A telephone number generally comprises a country code, a national destination

code, and a subscriber number (as defined in ITU-T E.164). You can configure the

VOP to recognize certain outgoing phone numbers, and translate them into the

correct SIP URI, and to translate incoming request URIs into the correct format.

Key Combinations for SIP Services

The VOP allows users to perform a variety of call functions, including call hold, call

waiting and call transfer. The user can activate these by pressing a combination of

telephone keypad keys. The VOP provides a default set of key combinations.

Caller Line Identifier Presentation and Caller Line Identifier Restriction

The VOP can transmit caller ID to the callee (CLIP) or restrict it (CLIR) over SIP.

Analog Modem Pass-through

The VOP supports analog modem service over the voice channel.

Fax Pass-through

The VOP supports fax service over the voice channel.

Ring AC power signal from FXS port indicating a phone call attempt

from remote party.

Tip/Ring Reversal FXS port reverses the voltage between the tip and the ring

Metering Tone FXS port sends a 12 /16kHz out-of-band sine wave for payphone

use.

Table 2 Supported Tones

TONE INDICATION

Dial tone A line is available for use.

Busy tone The dialed number is unreachable.

Congestion tone There are not enough resources to handle a call.

Ringback tone The remote party’s phone is ringing.

Waiting tone The other party’s line is engaged.

Howler tone The handset has been left off-hook too long.

Table 1 Out-of-Band POTS Signaling (continued)

SIGNAL DESCRIPTION