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During the initial installation of the VNS, Cisco strongly recommends that a modem be attached to the serial port and configured to auto-answer calls from our Product Support. By dialing in, Product Support can access the VNS remotely and resolve potential problems. An optional Motorola V.34R Modem can be purchased from Cisco. (For initial trials, the modem is required.)
This setup prepares a modem attached to the VNS to answer a call from Cisco's Product Support. You should arrange to work with Cisco Product Support to initially set up and test the modem for dial-in operation (i.e., auto answer). Cisco must record the telephone number for dialing into the VNS.
The port on the VNS should be factory-configured for 9600 bps and VT100 mode. Table E-1 lists the modem interface requirements.
| Parameter | Requirement |
|---|---|
VNS Port | Serial port, A/B (Terminal) |
Code | Standard 8-bit ASCII, 1 stop bit, no parity |
Interface | RS232 DCE |
Cable | 25-pin straight through cable |
Phone Lines | Dedicated dial-up business telephone line for ISC-to-VNS modem connection |
Data Rate | All standard asynchronous data rates from 300 to 19200 bps, independently selectable |
Supported Modems | Motorola Model V.34R 9600 baud modem |
There are two procedures to be performed before Product Support can dial into the VNS:
These procedures are for a typical connection. Refer also to the Modem User's Guide.
The VNS's Solaris operating system must be enabled before a modem can be connected to a VNS system.
To enable Solaris operating system for a modem, follow these steps:
Step 1 Login to the VNS as root and type
vns# eeprom ttya-ignore-cd=true
vns# eeprom ttya-rts-dtr-off=true
Step 2 Reboot the VNS by typing:
vns# init 6
Step 3 Physically connect the modem and configure it:
Step 4 Check to see if zsmon is configured and running
vns# sacadm -1 -t ttymon
If you get a message like:
"Invalid request, zsmon does not exist"
Then zsmon port monitor is not configured. Go to Step 5 (To configure zsmon port monitor)
If you get a result like the following, go to step 6 (Check to see if ttymon is configured
PMTAG PMTYPE FLGS RCNT STATUS COMMAND
zsmon ttymon
Step 5 To configure the zsmon port monitor:
vns# sacadm -a -p zsmon -t ttymon -c /usr/lib/saf/ttymon -V `ttyadm -V'V -y "Your
Comments"
Step 6 Check to see if ttymon is configured and running
vns# pmadm -1 -s ttya
(a) If there is no service, you will get a result like:
the service <a> does not exist
Go to step 7 (Execute the following command...)
(b) If there is service, you will get a result like:
PMTAG PMTYPE SVCTAG FLGS ID <PMSPECIFIC>
Then you need to remove the existing service by typing:
vns# pmadm -r -p zsmon -s ttya
Step 7 Execute the following command:
pmadm -a -p zsmon -s ttya -i root -V `ttyadm -V' -fu -m\
` `ttyadm -d /dev/term/a -s /usr/bin/login -1 contty5H -b -S n -m \
Idterm, ttcompat'" -y "Your comments"
Step 8 /etc/remote file and TIP
Edit /etc/remote and find the entry beginning with "hardwire:". Change the portion which says:
:dv=/dev/??????:
to read
:dv=/dev/cua/a:
Change the baud rate to :br#9600: (or to whatever baud rate you plan to use).
Step 9 Type:
vns# tip hardwire
you should see "connected"
type:
you should see "OK"
If you do not see "OK", you are not communicating with the modem. See if the modem is plugged in, verify the baud rate of the modem and the hardwire entry in /etc/remote. Verify the modem cable.
Type:
ATDT <phone number> to dial out.
To connect and configure the modem for dial-in operation, follow these steps:
Step 1 Connect power to the modem.
Step 2 Temporarily attach a terminal to the modem EIA port, using a straight-through cable. The modem's EIA port will automatically match the 9600 bps setting of the terminal.
Step 3 Configure the modem for 8 bits, no parity, and 1 stop bit.
Step 4 Enter the commands listed in Table E.2 to set up the modem for proper operation.
Step 5 Disconnect the terminal and connect that end of the cable to the VNS port (A/B [Terminal]). (The other end remains connected to the EIA port on the modem.)
Step 6 Connect the modem to the phone line.
Step 7 Ask the Cisco Product Support to test the operation of the dial-in modem.
| Step | Command | Function |
|---|---|---|
1 | AT&F&W | Reset to factory default and save. |
2 | ATS0=1 | Enables Auto-Answer Mode (answer on first ring). |
3 | ATL1 | Modem speaker at low volume. |
4 | AT*SM3 | Enables automatic MNP error correction. |
5 | AT*DC0 | Disables data compression. |
6 | AT*FL0 | Disables XON/XOFF flow control. |
7 | AT&S1 | Sets DSR to "normal". |
8 | ATE0 | Disables local character echo. |
9 | ATQ1 | Disables result codes. (Modem will appear "dead".) |
10 | AT&W | Saves current configuration settings in non-volatile memory. |
Not all of the modem EIA leads are supported by the VNS. If a Hayes modem is used in place of the MotorolaV34 Modem, configure the Hayes modem using the following AT commands:
DCD - On | AT&CØ |
DTR - On | AT&DØ |
DSR - Normal | AT&S1 |
CTS - ON when connected | AT&R1 |
| ATSØ=1 (answer on first ring) |
When the system is up, Cisco Product Support will be able to dial in to the VNS and login as any other user on the system.
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