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requirement for multiple T1 links from cisco 7200 to Cisco 2600 and deploying VOIP service from 2600

Posted on 2007-08-03
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Last Modified: 2013-11-05
Hi,
I have a question related to providing data and VOIP services to my customer.
My scenario is as:
Cisco 7200 vxr (Provider's End)---- 4 T1 links------Cisco 2600 (Customer's End)-- Voice and Data.
We have spares of 2600 routers. What would be the best way to connect between 7200 and 2600 using multiple and single T1 links. How does a CEF differs from Multiple PPP in case of multiple T1 links? How do I achieve this?
And another question is, does 2600 support VOIP? Is there any module provided on 2600 to deliver VOIP to the customer. I have 2 choices; using spears 2600 routers or other vendor's MTA. If I opt to use MTA like Innomedia MTA 6328-Re I have no idea how do I terminate T1 link to MTA. If I opt to choose 2600 then I have no idea what module do I need to add.
well, tell me how do I achieve this?
I will appreciate your response and glad to provide further clarity.

Thank you,
Rajendra Adhikari

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Question by:rajendraone
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16 Comments
 
LVL 17

Expert Comment

by:mikecr
ID: 19639402
What model 2600 is it? Don't use CEF, it adds layer 3 complexity. Use PPP on the router to bind the links together to the ISP. If one link goes down, they will never know. If you use CEF and one link goes down, you'll have a network hiccup.

What type of VoIP are you intending on doing? Is their going to be a T1 or FXO/FXS card terminated in the router for voice or is the ISP supply VoIP to the customer over the PPP link?
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Author Comment

by:rajendraone
ID: 19642662
Well, I am using 2611. And I am planning to do MLPPP. I got a sample configuration where it creates a multilink group. But I find cef is also enabled in the router, as #ip cef
If we use multilink PPP, then don't we have to do "#no ip cef"? What difference does ot make if we do multilink PPP but enable cef in the router? I mean to say what effect is there when a router has enabled cef but infact we have configured the routers with multilink PPP.
Well, I have termininated my plan to install VOIP module on the router for now, coz its bit expensive. Instead I am thinking to deploy the Innomedia 6328Re straight from 2600 ethernet interface at the customer end. I am going to configure this scenario soon and will ask again with any confusion or queries.

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Expert Comment

by:mikecr
ID: 19643038
I thought that you were going to use CEF for for load balancing HDLC links. It won't hurt anything being turned on for an MLPPP link. Just make sure that you have enough memory in the router when doing them together.
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LVL 4

Author Comment

by:rajendraone
ID: 19673489
Well, finally I have a Cisco router 2611 with VWIC 2MF-T1 and Cisco 7200 vxr with * port multilink T1 (PA-MC-8T1 ). But the problem is I could not establish bundled 2 T1 connection between these routers. I tried the 2T1 connection between two cisco router 2611 with same (VWIC-2mf-t1) modules. But not between the 2611 and 7200 with different modules.  The T1 connection just dont come up. Seems to be problem with linecode. I used the same configuration to configure the T1 for both routers as:
#controller T1 1/0
#   frmaing efs
#   linecode b8zs
#   channel-group 0 timeslots 1-24

Is gthere other way I should have done to interface T1 link between 2600 and 7200 with those abovre modules?
Well, it worked etween two 2600 routers with same modules with this configuration. Any suggestions.
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Expert Comment

by:mikecr
ID: 19680942
Do the T1's on the 7200 show up/up?
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Author Comment

by:rajendraone
ID: 19681491
Yes... status are up but the proto are down.
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Expert Comment

by:mikecr
ID: 19683675
Do a "show interface" on both end points along with a "show run interface ?" where question mark is for the interface name and post them both here minus any IP information.
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Author Comment

by:rajendraone
ID: 19685067
Note: the T1 cable length between the two are about 3 feet each. I suppose even if another t1 fails, one t1 should work. So, I did couple of test for another t1 to link point to point only.
I doubt in t1 card in 7200. The t1 card in 2600 was working fine when I made test with same kind of t1 card with another 2600.
for 2611:
#show runn
..
..
controller T1 0/0
 framing esf
 linecode b8zs
 cablelength showort 133
 channel-group 0 timeslots 1-24
!
controller T1 0/1
 framing esf
 linecode b8zs
 cablelength showort 133
 channel-group 0 timeslots 1-24
!
interface Multilink2
 description T1 Multilink
 ip address x.x.x.114 255.255.255.252
 no ip redirects
 no ip unreachables
 ppp multilink
 ppp multilink fragment-delay 20
 ppp multilink interleave
 multilink-group 2
!
interface Serial0/0:0
 description T1-1 (load showaring)
 no ip address
 encapsulation ppp
 fair-queue
 ppp multilink
 multilink-group 2
!
interface Serial0/1:0
 ip address x.x.x.118 255.255.255.252
!
router eigrp 1
 redistribute static
 network x.x.x.0 0.0.1.255
 no auto-summary
!
ip classless
ip route 0.0.0.0 0.0.0.0 x.x.x.113
no ip http server
!
interface Ethernet0/0
 description LAN connection
 ip address x.x.x.122 255.255.255.252
 showutdown
 half-duplex
!
interface Ethernet0/1
 ip address x.x.x.125 255.255.255.252
 half-duplex
!

Router_2611#show arp
Protocol  Address          Age (min)  Hardware Addr   Type   Interface
Internet  x.x.x.125             -   XXXX.AAAA.AAAA  ARPA   Ethernet0/1

Router_2611#show int s0/0:0
Serial0/0:0 is up, line protocol is down
  Hardware is PowerQUICC Serial
  Description: T1-1 (load showaring)
  MTU 1500 bytes, BW 1344 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation PPP, loopback not set
  Keepalive set (10 sec)
  LCP Listen, multilink Closed
  Closed: CDPCP
  Last input never, output 00:00:23, output hang never
  Last clearing of "showow interface" counters 02:05:26
  Input queue: 0/75/0/0 (size/max/drops/flushowes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshowold/drops)
     Conversations  0/1/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 1008 kilobits/sec
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 136 giants, 0 throttles
     279 input errors, 8 CRC, 128 frame, 0 overrun, 0 ignored, 143 abort
     1496 packets output, 53856 bytes, 0 underruns
     0 output errors, 0 collisions, 151 interface resets
     0 output buffer failures, 0 output buffers swapped out
     4 carrier transitions
  Timeslot(s) Used:1-24, SCC: 0, Transmitter delay is 0 flags
Router_2611#show int s0/1:0

Serial0/1:0 is up, line protocol is down
  Hardware is PowerQUICC Serial
  Internet address is x.x.x.118/30
  MTU 1500 bytes, BW 1344 Kbit, DLY 20000 usec,
     reliability 247/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, loopback not set
  Keepalive set (10 sec)
  Last input never, output 00:00:01, output hang never
  Last clearing of "showow interface" counters 01:25:55
  Input queue: 0/75/0/0 (size/max/drops/flushowes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshowold/drops)
     Conversations  0/1/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 1008 kilobits/sec
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 73 giants, 0 throttles
     110 input errors, 4 CRC, 39 frame, 0 overrun, 0 ignored, 67 abort
     516 packets output, 12384 bytes, 0 underruns
     0 output errors, 0 collisions, 172 interface resets
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions
  Timeslot(s) Used:1-24, SCC: 3, Transmitter delay is 0 flags



Router_2611#show controllers t1 0/0
T1 0/0 is up.
  Applique type is Channelized T1
  Cablelength is showort 133
  No alarms detected.
  alarm-trigger is not set
  Version info Firmware: 20031209, FPGA: 11, spm_count = 0
  Framing is ESF, Line Code is B8ZS, Clock Source is Line.
  Data in current interval (551 seconds elapsed):
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Data in Interval 1:
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Data in Interval 2:
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Data in Interval 3:
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Router_2611#show controllers t1 0/1
T1 0/1 is up.
  Applique type is Channelized T1
  Cablelength is showort 133
  No alarms detected.
  alarm-trigger is not set
  Version info Firmware: 20031209, FPGA: 11, spm_count = 0
  Framing is ESF, Line Code is B8ZS, Clock Source is Line.
  Data in current interval (568 seconds elapsed):
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Data in Interval 1:
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Data in Interval 2:
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Data in Interval 3:
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
      ###############################################################


Router 7206: There are 8 ports, but I tested with 2 ports only.
hostname Router_7206
!
controller T1 1/0
 framing esf
 clock source internal
 linecode b8zs
 cablelength showort 133
 channel-group 0 timeslots 1-24
!
controller T1 1/1
 framing esf
 linecode b8zs
 channel-group 0 timeslots 1-24
!
controller T1 1/2
 framing esf
 clock source internal
 linecode b8zs
 cablelength showort 133
 channel-group 0 timeslots 1-24
!
interface Multilink2
 description T1 Multilink to OmahaVoIP 2611
 ip address x.x.x.113 255.255.255.252
 no ip redirects
 no ip unreachables
 ppp multilink
 ppp multilink interleave
 ppp multilink group 2
 ppp multilink fragment delay 20
!
interface Serial1/0:0
 description T1 Multilink to OmahaVoIP 2611
 no ip address
 encapsulation ppp
 ppp multilink
 ppp multilink group 2
!
interface Serial1/1:0
 description T1 Multilink to OmahaVoIP 2611
 no ip address
 encapsulation ppp
 ppp multilink
 ppp multilink group 2
!
interface Serial1/2:0
 ip address x.x.x.117 255.255.255.252
!
Router_7206#show int s1/0:0
Serial1/0:0 is up, line protocol is down
  Hardware is Multichannel T1
  Description: T1 Multilink to OmahaVoIP 2611
  MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
     reliability 217/255, txload 1/255, rxload 1/255
  Encapsulation PPP, LCP REQsent, multilink Closed, crc 16, Data non-inverted
  Keepalive set (10 sec)
  Last input never, output 00:00:00, output hang never
  Last clearing of "showow interface" counters 02:05:06
  Input queue: 0/75/0/0 (size/max/drops/flushowes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshowold/drops)
     Conversations  0/1/16 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 1152 kilobits/sec
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts, 211 runts, 0 giants, 0 throttles
     6205 input errors, 276 CRC, 0 frame, 0 overrun, 0 ignored, 1338 abort
     1495 packets output, 44850 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
     4 carrier transitions
  no alarm present
  Timeslot(s) Used:1-24, subrate: 64Kb/s, transmit delay is 0 flags

Router_7206#show int s1/2:0
Serial1/2:0 is up, line protocol is down
  Hardware is Multichannel T1
  Internet address is x.x.x.117/30
  MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
     reliability 236/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, crc 16, Data non-inverted
  Keepalive set (10 sec)
  Last input never, output 00:00:02, output hang never
  Last clearing of "showow interface" counters 01:37:12
  Input queue: 0/75/0/0 (size/max/drops/flushowes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshowold/drops)
     Conversations  0/1/16 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 1152 kilobits/sec
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts, 314 runts, 0 giants, 0 throttles
     1021 input errors, 16 CRC, 0 frame, 0 overrun, 0 ignored, 526 abort
     583 packets output, 13992 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions
  no alarm present
  Timeslot(s) Used:1-24, subrate: 64Kb/s, transmit delay is 0 flags


Router_7206#show controllers t1 1/0
T1 1/0 is up.
  Applique type is Channelized T1
  Cablelength is showort 133
  No alarms detected.
  alarm-trigger is not set
  Soaking time: 3, Clearance time: 10
  AIS State:Clear  LOS State:Clear  LOF State:Clear
  Framing is ESF, Line Code is B8ZS, Clock Source is Internal.
  Data in current interval (160 seconds elapsed):
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
 
  Data in Interval 9:
     6553 Line Code Violations, 8 Path Code Violations
     0 Slip Secs, 2 Fr Loss Secs, 3 Line Err Secs, 0 Degraded Mins
     2 Errored Secs, 0 Bursty Err Secs, 2 Severely Err Secs, 22 Unavail Secs
  Data in Interval 10:
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Total Data (last 10 15 minute intervals):
     6553 Line Code Violations, 8 Path Code Violations,
     0 Slip Secs, 2 Fr Loss Secs, 3 Line Err Secs, 0 Degraded Mins,
     2 Errored Secs, 0 Bursty Err Secs, 2 Severely Err Secs, 22 Unavail Secs

Router_7206#show controllers t1 1/2
T1 1/2 is up.
  Applique type is Channelized T1
  Cablelength is showort 133
  No alarms detected.
  alarm-trigger is not set
  Soaking time: 3, Clearance time: 10
  AIS State:Clear  LOS State:Clear  LOF State:Clear
  Framing is ESF, Line Code is B8ZS, Clock Source is Internal.
  Data in current interval (178 seconds elapsed):
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Data in Interval 1:
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

  Data in Interval 7:
     4095 Line Code Violations, 74 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 513 Unavail Secs
  Data in Interval 8:
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs
  Data in Interval 9:
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs
  Data in Interval 10:
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 900 Unavail Secs
  Total Data (last 10 15 minute intervals):
     4095 Line Code Violations, 74 Path Code Violations,
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 3213 Unavail Secs


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Expert Comment

by:mikecr
ID: 19685149
You're getting a lot of inbound errors on those interfaces. Do a test. Save your current interface configuration and take one point to point t1 and change both interfaces to HDLC. Shut down both interfaces and reenable them again. When they come up see if the line protocol comes up. If they don't, do another show interface on them and post it here with them configured as HDLC so I can see it.
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Author Comment

by:rajendraone
ID: 19685604
yep, this test was done and output is alreadythere in the above post.
Serial 0/1 on Cisco 2600 was connected to Serial 1/2 on cisco 7200.  The Line Protocol was still down on both. Here is the output again:
Router_2611#show int s0/1:0

Serial0/1:0 is up, line protocol is down
  Hardware is PowerQUICC Serial
  Internet address is x.x.x.118/30
  MTU 1500 bytes, BW 1344 Kbit, DLY 20000 usec,
     reliability 247/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, loopback not set
  Keepalive set (10 sec)
  Last input never, output 00:00:01, output hang never
  Last clearing of "showow interface" counters 01:25:55
  Input queue: 0/75/0/0 (size/max/drops/flushowes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshowold/drops)
     Conversations  0/1/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 1008 kilobits/sec
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 73 giants, 0 throttles
     110 input errors, 4 CRC, 39 frame, 0 overrun, 0 ignored, 67 abort
     516 packets output, 12384 bytes, 0 underruns
     0 output errors, 0 collisions, 172 interface resets
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions
  Timeslot(s) Used:1-24, SCC: 3, Transmitter delay is 0 flags
Router_7206#show int s1/2:0
Serial1/2:0 is up, line protocol is down
  Hardware is Multichannel T1
  Internet address is x.x.x.117/30
  MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
     reliability 236/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, crc 16, Data non-inverted
  Keepalive set (10 sec)
  Last input never, output 00:00:02, output hang never
  Last clearing of "showow interface" counters 01:37:12
  Input queue: 0/75/0/0 (size/max/drops/flushowes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshowold/drops)
     Conversations  0/1/16 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 1152 kilobits/sec
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts, 314 runts, 0 giants, 0 throttles
     1021 input errors, 16 CRC, 0 frame, 0 overrun, 0 ignored, 526 abort
     583 packets output, 13992 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions
  no alarm present
  Timeslot(s) Used:1-24, subrate: 64Kb/s, transmit delay is 0 flags


Also, the show controller output are there in the above post.

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Expert Comment

by:mikecr
ID: 19686070
What type of cable are you using to hook to the smart jack with? A regular straight through ethernet cable should work. I have an extremely nasty suspicion that your T1s are not configured properly by the service provider. Contact them and tell them that your seeing errors on your router and the line protocol won't come up and to please check the circuit and test clean to the smart jack.

Before you do that though, on the 7206, change the clock source from internal to line and see if it comes up on both ends. The provider might be providing the clocking and not knowing thinking they were provisioning a frame relay circuit. Also before you call them, change your cable lenght from short to long on both routers if needed. Don't do both at the same time, just change the clocking first.
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Author Comment

by:rajendraone
ID: 19686418
I am not using any providers T1. This is just for test and I have created about 3 feet T1 cables using Rj-45. The cables are pin 1 of one end connected to pin4 and pin2 connected to pin 5, and vice versa which results in T1 cable.
This is for the test and with this T1 configuartion I am able to create MLPPP link betweeb two cisco 2600 routers using VWIC 2MF-T1 at both ends. Its not only working bewteen 2600 and 7200, where 2600 using VWIC 2MF-T1 and 7200 using PA-MC-8T1.
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Accepted Solution

by:
mikecr earned 1600 total points
ID: 19686681
Try adding the "clock rate 1544" to each serial interface with a shut and no shut and see what happens.
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Author Comment

by:rajendraone
ID: 19687940
Solved ! (speed 64 set in channel group of each T1 controller)
In 7200,
channel-group 0 timeslots 1-24 speed 64
Can you please provide me details on what exactly these speed configuration means. Little more details.

Thank you.
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Expert Comment

by:mikecr
ID: 19688608
The speed is the speed of each one of the 24 channels of the T1 controller. The speed can either be 56K or 64K, with 64 being common for most applications. If you have 1-24 timeslots, this is 24 channels at 64K a piece to amount to 1.536Mbit which is the speed of your T1.
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by:rajendraone
ID: 19718150
The problem was that the module in 2600 use speed 56K by default and 7200 uses 64k by default. So, the speed changed to 64K in the T1 controller of the 2600.

Thank you, mikecr for your responses, I appreciate.
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