11-01-2002 12:46 PM - edited 03-02-2019 02:34 AM
I have a 3620 w/ a T1 PRI to 24 mica digital modems. If i call the number, i get a fast-tone busy signal. Only fastethernet, serial1/0:23, Dial0 and Loopback0 are up, whereas Serial1/0:0-22, Group-Async1, Async1-24 are down.
Attached is the config, i was wondering if i need to up any interface/line in order for the 3620 to receive calls, or is it a config error.
Thanks for any help.
Sam
-------------------------------------------------------------------------------------------
!
version 12.1
no service single-slot-reload-enable
service timestamps debug datetime
service timestamps log datetime
service password-encryption
!
hostname scras
!
logging buffered 4096 debugging
logging rate-limit console 10 except errors
aaa new-model
aaa authentication login default local
aaa authentication ppp default group radius local
enable secret 5 xxx
enable password 7 xxx
!
username admin password 7 xxx
ip subnet-zero
!
!
no ip finger
ip domain-name lumenis.com
ip name-server 172.27.10.10
ip name-server 172.27.10.12
ip dhcp excluded-address 10.50.10.1
ip dhcp excluded-address 10.50.10.255
!
ip dhcp-server 172.27.10.10
ip dhcp-server 172.27.10.12
async-bootp gateway 172.27.0.2
async-bootp dns-server 172.27.10.10 172.27.10.12
async-bootp nbns-server 172.27.15.250 172.27.15.251
isdn switch-type primary-5ess
!
!
controller T1 1/0
framing esf
linecode b8zs
pri-group timeslots 1-24
!
controller T1 1/1
!
!
interface Loopback0
ip address 10.50.254.1 255.255.255.252
!
interface FastEthernet1/0
ip address 10.50.255.24 255.255.255.0
ip helper-address 172.27.10.12
ip helper-address 172.27.10.10
duplex auto
speed auto
!
interface Serial1/0:23
no ip address
encapsulation ppp
dialer rotary-group 0
dialer-group 1
isdn switch-type primary-5ess
isdn incoming-voice modem
no fair-queue
no cdp enable
!
interface Group-Async1
ip address 10.50.10.1 255.255.255.0
encapsulation ppp
async mode interactive
peer default ip address pool Dialin_Pool
ppp authentication ms-chap pap callin
group-range 1 24
!
interface Dialer0
ip unnumbered Loopback0
encapsulation ppp
no ip mroute-cache
dialer in-band
dialer idle-timeout 600
dialer-group 1
peer default ip address pool Dialin_Pool
no fair-queue
no cdp enable
ppp authentication chap pap
ppp multilink
!
router ospf 50
log-adjacency-changes
redistribute connected
redistribute static subnets
passive-interface Dialer0
network 10.50.255.0 0.0.0.255 area 0
!
ip local pool Dialin_Pool 10.50.10.100 10.50.10.200
ip default-gateway 172.27.0.2
ip classless
ip route 0.0.0.0 0.0.0.0 10.50.255.1
ip route 0.0.0.0 0.0.0.0 172.27.0.2
no ip http server
!
dialer-list 1 protocol ip permit
radius-server host 172.27.10.116 auth-port 1645 acct-port 1646
radius-server host 172.27.10.115 auth-port 1645 acct-port 1646
radius-server retransmit 3
radius-server key 7 xxx
!
line con 0
password 7 xxx
transport input none
line 1 24
autoselect during-login
autoselect ppp
modem Dialin
line aux 0
password 7 xxx
line vty 0 4
password 7 xxx
!
end
11-01-2002 02:56 PM
What is the status of...
show isdn status serial0:23
Do you see layer 1 active, layer 2 with MULTIPLE_FRAME_ESTD ?
11-01-2002 03:01 PM
Here's what i get from sh isdn status serial1/0:23
lobal ISDN Switchtype = primary-5ess
ISDN Serial1/0:23 interface
dsl 0, interface ISDN Switchtype = primary-5ess
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 0, Ces = 1, SAPI = 0, State = TEI_ASSIGNED
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 0 CCBs = 0
The Free Channel Mask: 0x807FFFFF
Total Allocated ISDN CCBs = 0
11-02-2002 07:42 AM
I don't see anything obviously wrong with the config, but I've only used dialer profiles in these situations, not legacy dialers. You do have the digital modem cards plugged into slot 0 of the 3640? The async line number associated with each modem depends upon which slot they are plugged into. The portware for the modems must also be loading properly when the system boots. And, of course, the digital modem carrier card and modem modules must all be working.
Try some of the show commands that display modem information to verify that the modems really are installed, working, and where you think they are. Sorry I can't tell you exactly what commands to use, I'm not attached to any approriate routers right now and I don't deal with 3640s with MICAs often enough to have them memorized, but "show line" and "show modem" come to mind. Perhaps someone else will chime in with the exact commands and expected responses...
Good luck and good hunting!
Vincent C Jones
11-02-2002 02:08 PM
The T1/ISDN line is not happy with the telco switch at layer 2. So Pl. talk to Telco people for that..Here is the url for troubleshooting more
http://www.cisco.com/warp/public/116/T1_pri.html
One the Layer 2 becomes "State = MULTIPLE_FRAME_ESTABLISHED" and since the config looks fine, all the calls, analog for modem and isdn data calls, should work just fine..
Here is the url with sample config which has more troubleshooting tips. Treat 5300 is same as 3600.
11-04-2002 10:08 AM
The issue was resolve with cisco tech support and worldcom
The problem, as you mentioned above is indeed a telco issue. The D channel was not in-sync with Worldcom, even though reboot the router a few times didn't help. Turns out gotta do it at the same time with Worldcom. Then the Layer 2 state changes.
Yeah, the links will definitely help before contacting tech support.
Thanks so much for everyone's help.
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