11-20-2008 01:34 PM - edited 03-15-2019 02:40 PM
max-ephones limited to 36 when configuring SRST. SRST V 3.1, IOS 12.3(8)T7. What determines this, and how do I configure for more? thanks
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11-20-2008 01:37 PM
Hey Pete,
This number is based on the Hardware Model of ISR you are using;
3845 will support 730 phones in SRST
3825 ==> 350 SRST phones
2851 ==> 100 SRST phones
2821 ==>50 SRST phones
Hope this helps!
Rob
11-20-2008 01:37 PM
Hey Pete,
This number is based on the Hardware Model of ISR you are using;
3845 will support 730 phones in SRST
3825 ==> 350 SRST phones
2851 ==> 100 SRST phones
2821 ==>50 SRST phones
Hope this helps!
Rob
11-20-2008 01:43 PM
Hello Rob. Thanks for the quick info. thats not good, considering there are over 200 phones on site. Suppose its better to find out now.
Model of ISR is a 2811. Is that limited to 36? Seems like a strange cutoff. thx
11-20-2008 03:38 PM
Hey Pete,
Sorry man! These hardware based restrictions are very similar to the number of supported phones with CME and is probably a reflection of the available "horse power" on the box itself. The number on a 2811 is actually down to 35 with the newer IOS's. Here is the actual breakdown;
Cisco 880 SRST Series Integrated Services Router
Up to 4 phones
Cisco 1861 Integrated Services Router
Up to 8 phones
Cisco 2801 Integrated Services Router
Up to 25 phones
Cisco 2811 Integrated Services Router
Up to 35 phones
Cisco 2821 Integrated Services Router
Up to 50 phones
Cisco 2851 Integrated Services Router
Up to 100 phones
Cisco 3825 Integrated Services Router
Up to 350 phones
Cisco Catalyst® 6500 Series Communications Media Module (CMM)
Up to 480 phones
Cisco 3845 Integrated Services Router
Up to 730 phones
*The number of phones supported by SRST have been changed to multiples of 5 starting with Cisco IOS Software Release 12.4(15)T3.
From this excellent doc;
http://www.cisco.com/en/US/prod/collateral/voicesw/ps6788/vcallcon/ps2169/data_sheet_c78-485221.html
Hope this helps!
Rob
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