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not yet have a phone number. Using a dial peer, you can assign one or more phone num-
bers to this analog device. Furthermore, dial peers allow you to use wildcards to define
ranges of phone numbers. This is useful when you want to define large groups of numbers
available from a destination such as a PBX system or PSTN connection.
You can create two primary types of dial peers:
Plain Old Telephone Service (POTS) dial peer: Defines voice reachability infor-
mation for any traditional voice connection (that is, any device connected to an FXS,
FXO, E&M, or digital voice port).
Key
To p i c
Voice over IP (VoIP) dial peer: Defines voice reachability information for any VoIP
connection (that is, any device that is reachable through an IP address).
Figure 6-4 illustrates the placement of POTS and VoIP dial peers in a network.
VoIP Dial Peer
POTS Dial Peer
V
Frame
Relay
E&M
Serial 0/0
V
Voice T1
FXS
PSTN
POTS
Dial Peer
POTS Dial Peer
Figure 6-4
POTS and VoIP Dial Peers
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