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Home > Archive > Voice over IP Cisco > November 2007 > No. of IP Phones in CME or SRST
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No. of IP Phones in CME or SRST
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| zohaib shabir 2007-11-26, 1:11 pm |
| Dear All,
I have a situation in which I have to add more than 24 IP Phones in
2801 .(The client has already purchased the router). I know that Cisco
Documentation says that we cannot add more than 24 IP Phones in CME or
SRST mode, but my question if I try to add more than 24 phones what
will going to happen. will the router deny me in adding more phones or
will i be able to add more than 24 phones in CME or srst.
--
Regards,
Zohaib Shabir
Network Engineer(Voice)
DWP Group, TECH Division Karachi
Ph:+92-302-8232689
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| Patrick Diener 2007-11-26, 1:11 pm |
| you can add ephones up to the limit defined in max-ephone under
telephony-service.
So if you have the following cfg.:
telephony-service
max-ephones 24
you will NOT be able to add ephone 25
(same with SRST under call-manager-fallback)
Regards
Patrick
On Nov 26, 2007 4:41 PM, zohaib shabir <zohaibshabir@gmail.com> wrote:
> Dear All,
> I have a situation in which I have to add more than 24 IP Phones in
> 2801 .(The client has already purchased the router). I know that Cisco
> Documentation says that we cannot add more than 24 IP Phones in CME or
> SRST mode, but my question if I try to add more than 24 phones what
> will going to happen. will the router deny me in adding more phones or
> will i be able to add more than 24 phones in CME or srst.
>
> --
> Regards,
> Zohaib Shabir
> Network Engineer(Voice)
> DWP Group, TECH Division Karachi
> Ph:+92-302-8232689
> ________________________________________
_______
> cisco-voip mailing list
> cisco-voip@puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
| |
| Voice Noob 2007-11-26, 1:11 pm |
| But you can't add more ephones than what the router supports.
So you can't go into telephony-service and put in max-ephones 25 in a 2801.
On Nov 26, 2007 9:52 AM, Patrick Diener <patrick.diener@gmail.com> wrote:
> you can add ephones up to the limit defined in max-ephone under
> telephony-service.
>
> So if you have the following cfg.:
>
> telephony-service
> max-ephones 24
>
> you will NOT be able to add ephone 25
> (same with SRST under call-manager-fallback)
>
> Regards
> Patrick
>
>
> On Nov 26, 2007 4:41 PM, zohaib shabir <zohaibshabir@gmail.com> wrote:
> ________________________________________
_______
> cisco-voip mailing list
> cisco-voip@puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
| |
| zohaib shabir 2007-11-26, 1:11 pm |
| Thank you for all the replies, but i have little confusion in SRST
some routers(3800 series) have more capacity in SRST than CME than why
not for 2801. Actually i have to do it in SRST mode.
On Nov 26, 2007 8:58 PM, Voice Noob <voicenoob@gmail.com> wrote:
> But you can't add more ephones than what the router supports.
> So you can't go into telephony-service and put in max-ephones 25 in a 2801.
>
>
> On Nov 26, 2007 9:52 AM, Patrick Diener <patrick.diener@gmail.com> wrote:
>
--
Regards,
Zohaib Shabir
Network Engineer(Voice)
DWP Group, TECH Division Karachi
Ph:+92-302-8232689
| |
| Lelio Fulgenzi 2007-11-26, 1:11 pm |
| SRST will support many more phones than CME. While I'm not to sure of the
technical reasons, I have a feeling that because SRST is a more simple, last
resort system with fewer options, it does not require as much memory as CME.
While processing power has something to do with it, it is also more likely
memory.
The limits and memory calculations they give you are for very simple router
configs, i.e. only IP routing enabled. If you enable anything else, oh, like
DHCP, it eats away at memory and you will no longer be able to add that many
phones to the config. I had a conversation with a list member off-line where
he had a very simple config, had the memory they suggested and was still not
able to add the number of phones they listed as the limit. So be prepared to
add extra memory.
That being said, I do not think there is a limit check in the IOS that says
you can not add more ephones to a specific router. Just try adding more and
when you restart the router you will see an error message that says "can not
add dial-peer due to memory" or something like that.
Likely not supported, but I wouldn't doubt it if it will work.
----- Original Message -----
From: "zohaib shabir" <zohaibshabir@gmail.com>
To: "Voice Noob" <voicenoob@gmail.com>
Cc: <cisco-voip@puck.nether.net>
Sent: Monday, November 26, 2007 11:06 AM
Subject: Re: [cisco-voip] No. of IP Phones in CME or SRST
> Thank you for all the replies, but i have little confusion in SRST
> some routers(3800 series) have more capacity in SRST than CME than why
> not for 2801. Actually i have to do it in SRST mode.
>
> On Nov 26, 2007 8:58 PM, Voice Noob <voicenoob@gmail.com> wrote:
>
>
>
> --
> Regards,
> Zohaib Shabir
> Network Engineer(Voice)
> DWP Group, TECH Division Karachi
> Ph:+92-302-8232689
> ________________________________________
_______
> cisco-voip mailing list
> cisco-voip@puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
| |
| Brett Looney 2007-11-26, 7:11 pm |
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> Thank you for all the replies, but i have little confusion in SRST
> some routers(3800 series) have more capacity in SRST than CME than why
> not for 2801. Actually i have to do it in SRST mode.
Only the 3825 and 3845 support more phones in SRST than in CCME mode. With
the 2801 you're stuck with 24 phones either way.
B.
| |
| Kelemen Zoltan 2007-11-28, 1:11 pm |
| Just try what
max-ephones ?
says in IOS. that is your configurable limit.
I'm not sure what cisco says is the limitation for it, but I have a 2811
running 42 phones and a lot more than basic IP routing. (full CME with
DHCP, internal BGP, QoS etc.) Anyway, shouldn't the default 256M be
enough? (can't find a straightforward way to check free memory, but
seems like 90-something MB is still free)
Then again, 2811 might have a 42 phone limit "officially" as well.
regards,
Zoltan
zohaib shabir wrote:
> Dear All,
> I have a situation in which I have to add more than 24 IP Phones in
> 2801 .(The client has already purchased the router). I know that Cisco
> Documentation says that we cannot add more than 24 IP Phones in CME or
> SRST mode, but my question if I try to add more than 24 phones what
> will going to happen. will the router deny me in adding more phones or
> will i be able to add more than 24 phones in CME or srst.
>
>
| |
| Jim McBurnett 2007-11-29, 7:11 am |
| I was recently told that 42 phones on a 2811 is a special patch that will not last forever...
Do not depend on that limit..
As for 2801 and more-- 30 is set there.. BUT again this only exists in some software releases...
I have not seen that on anything bigger than the 2811....
As always YMMV....
Later,
J
-----Original Message-----
From: cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net] On Behalf Of Kelemen Zoltan
Sent: Wednesday, November 28, 2007 3:16 AM
To: zohaib shabir
Cc: cisco-voip@puck-nether.net List
Subject: Re: [cisco-voip] No. of IP Phones in CME or SRST
Just try what
max-ephones ?
says in IOS. that is your configurable limit.
I'm not sure what cisco says is the limitation for it, but I have a 2811
running 42 phones and a lot more than basic IP routing. (full CME with
DHCP, internal BGP, QoS etc.) Anyway, shouldn't the default 256M be
enough? (can't find a straightforward way to check free memory, but
seems like 90-something MB is still free)
Then again, 2811 might have a 42 phone limit "officially" as well.
regards,
Zoltan
zohaib shabir wrote:
> Dear All,
> I have a situation in which I have to add more than 24 IP Phones in
> 2801 .(The client has already purchased the router). I know that Cisco
> Documentation says that we cannot add more than 24 IP Phones in CME or
> SRST mode, but my question if I try to add more than 24 phones what
> will going to happen. will the router deny me in adding more phones or
> will i be able to add more than 24 phones in CME or srst.
>
>
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
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