Voip-To-Pstn And Pstn-To-Voip Calling; How Voip-To-Pstn Calls Work - Cisco SPA232D Administration Manual
Mobility enhanced phone adapter
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Also See for SPA232D:
- Provisioning manual (213 pages) ,
- Quick start manual (17 pages) ,
- User manual (10 pages)
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Advanced Options for Voice Services
VoIP-to-PSTN and PSTN-to-VoIP Calling
VoIP-to-PSTN and PSTN-to-VoIP Calling
Cisco SPA232D Administration Guide
The ATA allows calls to be made by using SIP-based Voice-over-IP (VoIP) services
and traditional telephone Public Switched Telephone Network (PSTN) services.
Calls can be placed and received by using an analog phone or fax machine and
Cisco SPA302D Mobility Enhanced Cordless Telephone Handsets.
SPA232D typical topology
Analogue
Phone
IP
(FXS port)
or
Cordless
Phone
(DECT)
or
Fax Machine
(FXS port)
The ATA maintains the state of each call and makes the proper reaction to user
input events (such as on/off hook or hook flash). Because the ATA uses the Session
Initiation Protocol (SIP), it is compatible with most Internet Telephony Service
Provider (ITSP) offerings.
How VoIP-To-PSTN Calls Work
To obtain PSTN services through the Cisco SPA302D, the VoIP caller establishes a
connection with the PSTN Line by way of a standard SIP INVITE request
addressed to the PSTN Line.
Internet Service Provider
Internet (ADSL/Cable
Modem)
WAN
FXS/DECT
Cisco SPA232D
LAN
PC
C
FXO
Active PSTN
215
- Quick Links:
- Connecting the Equipment
- Basic Setup
- Sip
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