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Voice Performance
Tables 6 and 7 give information about connectivity and CPU performance, respectively, on the unified
communications routers.
Table 6.
FXS
FXO and
CAMA
E&M
Analog
DID
BRI ports
T1/E1
ports
T1
channels
E1
channels
* This table contains physical connectivity numbers. You should also use CPU performance as a guide to determine how many
voice calls can actually be supported on each platform.
Table 7.
VoIP Performance: Maximum Number of Simultaneous Calls (not exceeding 75-percent platform CPU usage)
Cisco Unified Border Element
Standalone Unified Communications Router
No
encryption
SIP TLS
with SRTP
H.323
Signaling
in IPsec
with SRTP
H.323
Signaling
and media
in IPsec
WAN Edge Gateway
No
encryption
SIP TLS
with SRTP
20
Gigabit Ethernet or Fast Ethernet egress; no quality-of-service (QoS) features; voice traffic only
21
T1/E1 or High-Speed Serial Interface (HSSI) serial egress; some QoS features; voice and small amount of data traffic
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Maximum Physical DS-0 Connectivity on the Cisco Unified Communications Routers
Cisco
Cisco
Cisco
Cisco
1861
2801
2811
2821
4
16
28
52
4
16
24
36
-
8
12
12
-
8
24
32
2
8
12
20
-
1
12
12
-
24
288
288
-
30
360
360
CPU Performance on the Cisco Unified Communications Routers
Cisco
Cisco
Cisco
Cisco
2801
2811
2821
2851
55
110
200
225
32
70
112
170
32
65
104
160
32
60
96
140
32
34
52
80
21
32
48
80
140
32
45
75
130
Cisco
Cisco
Cisco
Cisco
2851
3825
3845
2901
52
52
88
16
36
36
56
16
12
16
24
8
32
32
48
16
20
20
32
8
12
16
24
8
288
384
576
192
360
480
720
240
Cisco
Cisco
Cisco
Cisco
3825
3845
2901
2911
400
500
100
200
20
340
450
100
150
320
420
100
150
290
370
100
150
150
185
100
150
270
320
100
150
250
300
100
150
*
Cisco
Cisco
Cisco
Cisco
2911
2921
2951
3925
40
40
64
64
28
28
40
40
12
12
16
16
32
32
48
48
16
16
24
24
20
20
24
24
480
480
576
576
600
600
720
720
*
Cisco
Cisco
Cisco
2921
2951
3925
400
600
800
240
400
720
240
400
720
240
400
720
195
325
360
240
400
610
240
400
600
Cisco
Cisco
Cisco
3945
3925E
3945E
112
60
108
64
36
60
24
14
22
80
44
76
40
22
38
32
20
28
768
480
672
960
600
840
Cisco
Cisco
Cisco
3945
3925E
3945E
950
2100
2500
960
600
840
880
600
840
780
600
840
385
600
840
650
600
840
645
600
840
Page 14 of 20
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