Datasheet

Cisco Systems, Inc.

Page 2 of 7

Figure 2

Analog Device Integration with Cisco VG248

Analog Phone Connectivity

The Cisco VG248 is ideal for implementations in which it is necessary to use analog phones because it provides a

high level of functionality at those locations, including:

• Caller ID—The Cisco VG248 supports caller ID (both name and number), so users can tell who is calling before

answering the phone.

• Message-waiting light—The Cisco VG248 supports two methods of analog light activation: high-DC voltage

(message-waiting indicator light) and frequency-shift-key (FSK) messaging, as well as stuttered dial tone for

phones without a visualindicator. These schemes areused byprivate branch exchange (PBX) systems and central

ofﬁces, respectively.

• Call waiting—When on a call, if a new call comes in the user hears an audible tone and can “click over” to the

new caller.

• Caller ID on call waiting—The user can see who is calling before deciding whether to take the new call.

• Transfer—Both blind and supervised transfers are supported, using the standard Bellcore ﬂash hook method.

• Conference—Conference calls can be initiatedfromananalogphoneusingﬂashhookorfeatureaccesscodesand

the Cisco CallManager will direct the devices to a media resource for the conference call. Up to six parties can

participate.

• Feature access codes—More advanced features can be activated using feature access codes.

• Speed dial—A user can set up commonly dialed numbers using the Cisco CallManager Web interface and then

dial these numbers directly from an analog phone.

• Call forward all—Calls can be forwarded to a number within the dial plan.

• Redial—A simple last-number redial can be activated from analog phones connected to the Cisco VG248.

• Cisco SoftPhone support—Cisco SoftPhone functionality is supported with analog phones.

IP Phones

IP IPIP

Legacy Analog

Phones

Cisco

VG248

Analog

Modem

Fax

Cisco

CallManager

Cluster

Gateway

PSTN