Cisco 450 Руководство по установке оборудования - Страница 6
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Slot, Bay, and Ports
Feature
SM-X-8FXS/12FXO
FXS/FXO (RJ-21)RJ-21
Interface
ports 0 to 7: FXSRJ-21
ports 8 to 19: FXO
Address signaling
In-band DTMF
format
Out-of-band pulse (8 to 12
pps)
FXS signaling
FXS loop-start,
formats
ground-start, and DID
signaling
Slot, Bay, and Ports
The FXO port is used to connect to PBX or key systems, or to provide off-premises connections to the PSTN.
It supports battery reversal detection and caller ID. The FXO port is also used to connect to analog Centralized
Automatic Message Accounting (CAMA) trunks to provide dedicated E-911 service (only in North America).
The FXS port is used to connect analog phones, modems, fax machines, and speaker phones to an enterprise
IP voice system, and to use them as extensions to your Cisco or third-party IP call-control system. Having
these devices tightly integrated with the IP-based phone system is advantageous for increased manageability,
scalability, and cost-effectiveness. The Direct Inward Dialing (DID) port is used to provide off-premises DID
connection from the central office. It serves only incoming calls from the PSTN. The Caller ID feature is not
supported in DID mode.
Cisco 450 Voice Gateway supports the following:
• Slot 0/1, 0/2, 0/3:
• SM Slots 1 and 2:
Cisco 450 Voice Gateway Hardware Installation Guide
4
SM-X-16FXS/2FXO
FXS/FXO (RJ-21)RJ-21
ports 0 to 15: FXSRJ-21
ports 16 and 17: FXO
In-band DTMF Out-of-band
pulse (8 to 12 pps)
FXS loop-start,
ground-start, and DID
signaling
• NIM-1MFT-T1/E1
• NIM-2MFT-T1/E1
• NIM-4MFT-T1/E1
• NIM-8MFT-T1/E1
• NIM-2FXO
• NIM-4FXO
• NIM-4EM
• NIM-2BRI-NT/TE
• NIM-4BRI-NT/TE
• NIM-2FXSP
• NIM-4FXSP
• NIM-2FXS/4FXOP
• SM-X-8FXS/16FXO
• SM-X-16FXS/2FXO
• SM-X-24FXS/4FXO
Overview of Cisco VG450 Voice Gateway
SM-X-24FXS/4FXO
FXS (RJ-21), FXO
(RJ-11)RJ-21 ports 0 to 23:
FXSRJ-11 ports 24 to 27:
FXO
In-band DTMF Out-of-band
pulse (8 to 12 pps)
FXS loop-start, ground-start,
and DID signaling
SM-X-72FXS
FXS (RJ-21)
In-band DTMF
Out-of-band pulse (8
to 12 pps)
FXS loop-start,
ground-start, and DID
signaling