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Enterprise Intranet Phone Calling and Faxing

A common application for the Cisco AS5300/Voice Gateway

cards is intranet phone calling and faxing. Using the Cisco

AS5300/Voice Gateway, alongwith theCisco3600 and2600

with voice modules, companies can signiﬁcantly reduce their

long-distance telephone and fax charges by routing their

interofﬁce voice and fax trafﬁc over their existing IP network

(Figure 5). In intranets, administrators can monitor and

control service levels and, therefore, achieve and maintain

toll-quality voice and fax transmissions on their data

networks by using the Cisco packet telephony

gateway-enabled family of products.

Becausethe Cisco AS5300/Voice Gateway, as well as the

Cisco 3600 and2600, allwork with standardphone andfax

equipment, companies can shift their interofﬁce voice and

fax trafﬁc from their voice network to their data network

without needing to retrain users. Transparent to the user, a

phone connected through a PBX to a voice port on the Cisco

AS5300/Voice Gatewayat headquarters cancall over aWAN

connection to a phone connected to a key system that is

connected to a Cisco 3600 at the regional ofﬁce, or to a

phone directly connected to a Cisco 2600 at the branch

ofﬁce. Some smaller ofﬁces may not need the full

functionality of a PBX, as in this case, where the Cisco 3600

and 2600 are sufﬁcient. Cisco packet telephony products

seamlessly route calls or faxes to the IP network or out to the

PSTN, depending on settings established by the network

administrator. Cost savings from deploying the Cisco

voice/fax solution to handle intranet phone calls and faxes

will typically cover the upfront equipment investment in a

matter of months.

Table 1 Packet Telephony Gateway-Enabled Products from Cisco

Number of

Voice Ports

Recommended Cisco Packet Telephony

Gateway-Enabled Product

Up to 2520 Cisco AccessPath VS3 digital T1/E1 interfaces

Up to 120 Cisco AS5300 digital T1/E1 interfaces

Up to 12 Cisco 3600 analog/ BRI

Up to 4 Cisco 2600 analog/ BRI

Figure 5 Enterprise Intranet Phone Calling and Faxing

PSTN

IP Cloud

PSTN

IP Cloud

2 to 4

Analog Ports (calls)

Phone

PBX

Fax

Cisco 2611

2 to 12

Analog Ports (calls)

Cisco Voice Manager

1 to 4 T1/E1

Up to 96/120 calls

Cisco 3640

Cisco AS5300

Headquarters

Regional Office

Branch Office

1 2 3 4 5 6 7 8 9 10 11 12

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