Specifications

4-13
Cisco AS5x00 Case Study for Basic IP Modem Services
11/24/1999
Section 4 Verifying Modem Performance
Initiating a Modem Loopback Test Call
Step 6
Log in from the client telnet session. The Cisco IOS sends out a username-password prompt.
This is a secured device.
Unauthorized use is prohibited by law.
User Access Verification
Username:admin
Password:
Sep 23 05:04:58.047: TTY0: pause timer type 1 (OK)
Sep 23 05:04:58.051: TTY1: asserting DTR
Sep 23 05:04:58.051: TTY1: set timer type 10, 30 seconds
Sep 23 05:05:03.583: TTY1: set timer type 10, 30 seconds
Step 7
Enter the
at
command to test connectivity to the NAS modem. The modem reports an “OK” return
message.
at
OK
Step 8
Dial the PRI phone number assigned to the NAS (in this example, 5551234). A connect string appears
when the modem connects.
atdt5551234
CONNECT 33600 /V.42/V.42bis
In this example:

Modulation connect speed = 33600 bps. Expect to get a maximum of 33600 bps if you use a
PRI line. If you use RBS, expect to get a maximum of 31200 bps.

Error correction = V.42

Data compression = V.42bis
Step 9
From the administrative telnet session, inspect the debug output:
*Jan 1 00:34:47.863:ISDN Se0:23:RX <- SETUP pd = 8 callref = 0x0053
*Jan 1 00:34:47.863: Bearer Capability i = 0x8090A2
*Jan 1 00:34:47.863: Channel ID i = 0xA98381
*Jan 1 00:34:47.863: Calling Party Number i = 0x0083, '408'
*Jan 1 00:34:47.863: Called Party Number i = 0xC1, '5551234'
*Jan 1 00:34:47.867:ISDN Se0:23:TX -> CALL_PROC pd = 8 callref = 0x8053
*Jan 1 00:34:47.867: Channel ID i = 0xA98381
*Jan 1 00:34:47.867:ISDN Se0:23:TX -> ALERTING pd = 8 callref = 0x8053
*Jan 1 00:34:47.867:EVENT_FROM_ISDN::dchan_idb=0x6149A144, call_id=0x1A,ces=0x1
bchan=0x0, event=0x1, cause=0x0
The bearer capability 0x8090A2 indicates an analog voice call. Alternative bearer services include 64K
data calls, which are indicated by 0x8890. The calling party number is 408 (also known as ANI). The
called party number is 5551234 (also known as DNIS). The
debug q931
command shows the call
coming into the NAS over ISDN.
*Jan 1 00:34:47.867:VDEV_ALLOCATE:1/2 is allocated from pool System-def-Mpool
*Jan 1 00:34:47.867:csm_get_vdev_for_isdn_call:fax_call=0
*Jan 1 00:34:47.867:EVENT_FROM_ISDN:(001A):DEV_INCALL at slot 1 and port 2
*Jan 1 00:34:47.867:CSM_PROC_IDLE:CSM_EVENT_ISDN_CALL at slot 1, port 2
*Jan 1 00:34:47.867:Mica Modem(1/2):Configure(0x1 = 0x0)
*Jan 1 00:34:47.867:Mica Modem(1/2):Configure(0x23 = 0x0)
*Jan 1 00:34:47.867:Mica Modem(1/2):Call Setup
*Jan 1 00:34:47.867: Enter csm_connect_pri_vdev function