SM-X-72FXS
SM-X-24FXS/4FXO
SM-X-16FXS/2FXO
SM-X-8FXS/12FXO
Feature
FXS (RJ-21)
FXS (RJ-21), FXO
(RJ-11)RJ-21 ports 0 to 23:
FXSRJ-11 ports 24 to 27:
FXO
FXS/FXO (RJ-21)RJ-21
ports 0 to 15: FXSRJ-21
ports 16 and 17: FXO
FXS/FXO (RJ-21)RJ-21
ports 0 to 7: FXSRJ-21
ports 8 to 19: FXO
Interface
In-band DTMF
Out-of-band pulse (8
to 12 pps)
In-band DTMF Out-of-band
pulse (8 to 12 pps)
In-band DTMF Out-of-band
pulse (8 to 12 pps)
In-band DTMF
Out-of-band pulse (8 to 12
pps)
Address signaling
format
FXS loop-start,
ground-start, and DID
signaling
FXS loop-start, ground-start,
and DID signaling
FXS loop-start,
ground-start, and DID
signaling
FXS loop-start,
ground-start, and DID
signaling
FXS signaling
formats
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:
• 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 Slots 1 and 2:
• SM-X-8FXS/16FXO
• SM-X-16FXS/2FXO
• SM-X-24FXS/4FXO
Cisco 450 Voice Gateway Hardware Installation Guide
4
Overview of Cisco VG450 Voice Gateway
Slot, Bay, and Ports
