Installation guide

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Cisco AS5850 Universal Gateway Commissioning Guidelines
78-10537-04
How to Commission the Cisco AS5850 Universal Gateway
Task 6. Configuring the Serial Interfaces
Configure the serial D channels to route incoming voice calls from the PSTN to the integrated modems.
The behavior of the B channels is controlled by the D-channel configuration instructions. The D channel
is the signaling channel.
Table 7 describes the relationship between T1 controllers and serial interfaces.
• After timeslots are assigned by the pri-group command, D-channel serial interfaces are
automatically created in the configuration file (for example, S0/0:0:23, S0/0:1:23, and so on).
• Individual B-channel serial interfaces are created as rotary members (dialers) of their signaling
D channels (for example, S0/0:0:0 through S0/0:0:22). The D-channel interface functions like a
dialer for all the 23 B channels using the controller.
• An ISDN switch type defined on the global level is automatically propagated to the serial D-channel
interface level. However, a switch type defined on the serial-interface level overrides a switch type
defined on the global level.
To configure the serial interfaces, perform the following steps.
Step 1 Apply the isdn incoming-voice modem command to each D-channel serial interface. In this example,
one interface is configured.
Gateway(config)# interface serial 1/0/0:4:23
Gateway(config-if)# isdn incoming-voice modem
Step 2 Verify that ISDN is functioning properly, and that the serial channels are up.
a. Check the ISDN status. Confirm that Layer 1 reports ACTIVE, and the display field
MULTIPLE_FRAME_ESTABLISHED appears at Layer 2. For PRI lines, the terminal endpoint
identifier (TEI) is always 0. The Layer 3 status reports no active calls.
Gateway# show isdn status
Global ISDN Switchtype = primary-ni
ISDN Serial0/0:4:23 interface
dsl 0, interface ISDN Switchtype = primary-5ess
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
Layer 3 Status:
0 Active Layer 3 Call(s)
Activated dsl 0 CCBs = 0
The Free Channel Mask: 0x807FFFFF
Table 7 Controller-to-Channel Relationships
T1 Controllers D Channels B Channels
Controller T1 0/0 Interface serial 0/0:23 S0/0:0 through S0/0:22
Controller T1 0/1 Interface serial 0/1:23 S0/1:0 through S0/1:22
Controller T1 0/2 Interface serial 0/2:23 S0/2:0 through S0/2:22
Controller T1 0/3 Interface serial 0/3:23 S0/3:0 through S0/3:22
Controller T1 0/4 Interface serial 0/4:23 S0/4:0 through S0/4:22
... ... ...