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marrold/3845_Dial-Up_NAS_T1_15.3

Last active August 24, 2024 16:40
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Cisco 3845 Dial-Up Network Access Server Configuration - T1 on IOS 15.3
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3845_Dial-Up_NAS_T1_15.3
! Configure the E1/T1 cards to use T1
!
card type t1 0 1
card type t1 1
!
!
! Set the default ISDN switch type
!
isdn switch-type primary-ni
!
!
! Configure the clock synchronisation for the T1s. We use the internal clock
! for the VWIC2-1MFT-T1/E1 and the 1CE1T1-PRI uses the clock on the line
! provided by the 1MFT-T1/E1
!
network-clock-participate slot 1
network-clock-participate wic 1
network-clock-select 1 E1 1/0
!
!
! Configure the T1 controllers. The controller on 0/0/0 gets it's clock
! internally. Also configure the timeslots - we use all of them, but
! if you don't have enough PVDMs you might want to use a fractional circuit.
! make sure it matches on both ends.
!
controller T1 0/1/0
no shutdown
cablelength short 110ft
clock source internal
pri-group timeslots 1-4,16
!
controller T1 1/0
no shutdown
cablelength short 110ft
pri-group timeslots 1-4,16
!
!
! Configure the Serial Interfaces (The "D" channels on the PRI circuit).
! Serial0/1/0:23 is the 1MFT-T1/E1 acting as the "network" and Serial1/0:23
! is the 1CE1T1-PRI acting as a "user". "isdn incoming-voice modem" forces
! incoming calls to the modem bank.
!
interface Serial0/1/0:23
no shutdown
no ip address
encapsulation hdlc
isdn switch-type primary-ni
isdn protocol-emulate network
isdn incoming-voice voice
no cdp enable
!
interface Serial1/0:23
no shutdown
no ip address
encapsulation hdlc
isdn switch-type primary-ni
isdn incoming-voice modem
no cdp enable
!
!
! Add an IP to the a Loopback interface for dial up clients to use as the gateway
!
interface Loopback0
ip address 10.1.8.1 255.255.255.0
!
!
! Configure the subnet-mask, gateway and DNS server for dial up clients
!
async-bootp subnet-mask 255.255.255.0
async-bootp gateway 10.1.8.1
async-bootp dns-server 8.8.8.8
!
!
! Configure the pool of IPs for the Dial Up Clients
!
ip local pool async 10.1.8.2 10.1.8.255
!
!
! Define a list of "interesting" traffic that keeps the dial up connection open.
! We select all IP traffic
!
dialer-list 1 protocol ip permit
!
!
! Configure an access list to use for NATing traffic
!
access-list 1 permit 10.1.8.0 0.0.0.255
!
!
! Configure NAT to use access-list 1 and interface Gi0/0
!
ip nat inside source list 1 interface GigabitEthernet0/0 overload
!
!
! Configure the interface as outside for NAT
!
interface GigabitEthernet0/0
ip nat outside
!
! Configure the async interfaces. We use a group to apply the settings to all
! of the async interfaces at once. A description of each parameter is below:
!
! no shutdown = Make sure the device isn't shut down
! ip unnumbered Loopback3 = Use the Loopback3 interface
! ip nat inside = This interface is inside NAT.
! encapsulation ppp = Use ppp encapasulation
! dialer in-band = Use in-band management
! dialer idle-timeout 600 = Set the idle timeout to 600 seconds
! dialer-group 1 = Assign to dialer group 1
! peer default ip address pool async = Set the IP address pool.
! async mode dedicated = Dedicated only, disable console access
! no keepalive = Disable keep alive
! ppp authentication chap = Use CHAP authentication
! ppp multilink = Enable MLPPP
! group-range 2/0 2/5 = Apply these settings to all the modems.
!
interface Group-Async0
no shutdown
ip unnumbered Loopback0
ip nat inside
encapsulation ppp
dialer in-band
dialer idle-timeout 600
dialer-group 1
peer default ip address pool async
async mode dedicated
no keepalive
ppp authentication chap
ppp multilink
group-range 2/0 2/5
!
!
! Configure modems for United Kingdom. You might want to update this to your
! location, but I've not tested others.
!
modem country mica united-kingdom
!
!
! Configure the modemcap to sane defaults
!
modemcap entry v92:MSC=&F&D2S54=16584S0=0S29=12S21=15S62=8S63=3S34=18000S40=10S10=50
!
!
! Configure the modem lines. A description of each parameter is below:
!
! modem InOut = Allow modem in and out
! modem autoconfigure type default = Use modemcap "default"
!
line 2/0 2/5
modem InOut
modem autoconfigure type v92
!
!
! Configure the voice ports (FXSs). In theory you can set the station-id number
! to whatever you like. You should also customise the ring and cptone to your
! location. A description of each parameter is below:
!
! ring cadence pattern11 = Sets the ring cadence to patern11 (UK ring-ring)
! compand-type a-law = Forces the port to a-law.
! cptone GB = Sets the call progress tones to Great Britain
! station-id number 1001 = Set the station-id (extension) number
!
voice-port 0/1/0
no shutdown
compand-type u-law
station-id number 1001
!
voice-port 0/1/1
no shutdown
cptone US
compand-type u-law
station-id number 1002
!
voice-port 0/1/2
no shutdown
cptone US
compand-type u-law
station-id number 1003
!
voice-port 0/1/3
no shutdown
cptone US
compand-type u-law
station-id number 1004
!
!
! Configure the dial-peer to route calls over the T1 to the modems.
! A description of each parameter is below:
!
! destination-pattern 1000 = Sets the number to call the modem bank (1000)
! port 0/1/0:23 = Routes the call over the T1
! forward-digits all = Forwards all digits over the T1
!
dial-peer voice 1000 pots
destination-pattern 1000
port 0/1/0:23
forward-digits all
!
!
! Create a user for use with the PPP connection
!
username dialuser privilege 0 password 0 password
!
!
! Move the exec / enable command to privilege level 1 to limit what the dialuser has access to
!
privilege exec level 1 enable
@Dr-Wily
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Dr-Wily commented Jan 18, 2024 •
edited
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Is the FXS card can generate phone tone ? Some devices refuse to dial if there no phone tone. Plus, the NM-6DM card is difficult to find. I you have tips to find it a reasonable price, I take. ;)

@rkrenicki
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rkrenicki commented Jul 31, 2024 •
edited
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Is the FXS card can generate phone tone ? Some devices refuse to dial if there no phone tone. Plus, the NM-6DM card is difficult to find. I you have tips to find it a reasonable price, I take. ;)

@Dr-Wily The VICx-4FXS/DID cards are indeed the version that generate a dial tone. I do agree that NM-xxDM modules are quite difficult to find nowadays. I fear that you and I are a few years too late to the game here.

@marrold I noticed that you indicated that this is for IOS version 15.3, but I do not believe that version was ever available on the 3800 series. Did you perhaps mean 15.1(3)?

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