Datasheet

Configuring Voice Ports
Configuring Digital Voice Ports
VC-76
Cisco IOS Voice, Video, and Fax Configuration Guide
Configuring Basic Voice Port Parameters for Digital T1/E1 Voice Ports
For FXO and FXS connections the default voice-port parameter values are often adequate. However, for
E&M connections, it is important to match the characteristics of your PBX, so voice port parameters
may need to be reconfigured from their defaults.
Each voice port that you address in digital voice port configuration is one of the logical voice ports that
you created with the ds0-group command.
Companding (from compression and expansion), used in Step 4 of the following table, is the part of the
PCM process in which analog signal values are logically rounded to discrete scale-step values on a
nonlinear scale. The decimal step number is then coded in its binary equivalent prior to transmission.
The process is reversed at the receiving terminal using the same nonlinear scale.
Note The commands, keywords, and arguments that you are able to use may differ slightly from those
presented here, based on your platform, Cisco IOS release, and configuration. When in doubt, use
Cisco IOS command help (command ?) to determine the syntax choices that are available.
To configure basic parameters for digital T1/E1 voice ports, use the following commands beginning in
global configuration mode.
Command Purpose
Step 1
Cisco 2600 and 3600 Series Routers
Router(config)# voice-port slot/port:ds0-group-no
Cisco MC3810 Multiseries Concentrators
Router(config)# voice-port slot:ds0-group-no
Cisco AS5300 Universal Access Server
Router(config)# voice-port controller : ds0-group-no
Cisco AS5800 Universal Access Server
Router(config)# voice-port
shelf/slot/port : ds0-group-no
Cisco 7200 Series Routers
Router(config)# voice-port
slot/port-adapter : ds0-group-no
Cisco 7500 Series Routers
Router(config)# voice-port
slot/port-adapter/slot:ds0-group-no
Enters voice-port configuration mode. The
arguments are defined as the following
• slot—Specifies the router location where the
network module (Cisco 2600, 3600, and
MC3810) or voice port adapter (Cisco
AS5300, AS5800, 7200, and 7500) is
installed. This is the same number as the
controller for the T1/E1 voice port.
• port—Indicates the voice interface card
location.
• ds0-group-no—Specifies the logical voice
port that was created with the ds0-group
controller command.
• controller—Indicates the controller for the
T1/E1 voice port.
• shelf—Specifies the dial shelf, which is
always 0.
• port-adapter—Indicates the port adapter for
the voice port.
Step 2
Router(config-voiceport)# type {1 | 2 | 3 | 5}
(E&M only) Specifies the type of E&M interface
to which this voice port is connected. See Table 5
for an explanation of E&M types.
The default is 1.