Re: Synchronous and asynchronous communication

Gaurav,
at least in the routers I have access to, T interfaces can not do async:

R1#sh hard
...
Cisco 2811 (revision 53.51) with 237568K/24576K bytes of memory.
Processor board ID FTX1132F033
2 FastEthernet interfaces
2 Low-speed serial(sync/async) interfaces
...
R1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R1(config)#int s 0/0/0
R1(config-if)#p?
physical-layer priority-group pulse-time

R1(config-if)#p

------------------------

GW#sh hard
...
isco 2610XM (MPC860P) processor (revision 1.0) with 127430K/3642K bytes
of memo
ry.
Processor board ID JAE07382264
M860 processor: part number 5, mask 2
1 FastEthernet interface
2 Serial interfaces
...
GW#conf t
Enter configuration commands, one per line. End with CNTL/Z.
GW(config)#int s 0/0
GW(config-if)#p?
priority-group pulse-time

GW(config-if)#p

Can you please test it ?
-Carlos

GAURAV MADAN @ 30/01/2011 12:57 -0300 dixit:
> Under Serial-interface issue the command :
>
> int serial <>
> physical-layer async .
>
> 1) By default the interface will operate in SYNC mode
> 2) You can switch between sync and async mode
> 3) This is applicable to WIC / HWIC -2T , HWIC-1T , HWIC-2A/S etc . On
> ISRs and ISR-G2 .. Other platform line cards ... I am not sure
>
> Thanks
> Gaurav Madan
> CCIE
>
> On Sun, Jan 30, 2011 at 9:16 PM, Routing Freak <routingfreak_at_gmail.com> wrote:
>> how to change a interface to syn or asyn
>> is there any command to change a router serial interface as a asyn
>> whether ethernet interface has any significance wid sync and async interface
>>
>> On Sun, Jan 30, 2011 at 9:07 PM, GAURAV MADAN <gauravmadan1177_at_gmail.com>
>> wrote:
>>> Communication is called asynchronous if the sender and receiver do not
>>> need to synchronise before each transmission. A sender can wait
>>> arbitrarily long between transmissions and the receiver must be ready
>>> to receive data when it arrives.
>>>
>>> Synch. transmission agree to clock rate before the data transmission
>>> occurs .
>>>
>>> Example would be : Serial interface which can work in sync as well as
>>> async mode .
>>> In sync mode ; you have to configure clock rate on DCE and then only
>>> data transmission occurs .
>>>
>>> Async serial interfaces ; there is no funda of clock rate CLI .
>>>
>>> I hope I made things clearer .
>>>
>>> Gaurav Madan
>>> CCIE
>>>
>>> On Sun, Jan 30, 2011 at 3:14 PM, Routing Freak <routingfreak_at_gmail.com>
>>> wrote:
>>>> Can anyone tell me what is the difference between the synchronous and
>>>> asynchronous communication in routers,switches and hosts
>>>>
>>>>
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-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net