how manny isdn calls can I make at a time

[MariusK01]

Hello,

I am trying to find out what is the maximum in/out calls that can be made simultenously at a time.

Ran a command on voice-gateway "voice dsp group all" and it listed the results. Can anyone brake it down for me please? Is it 16 calls that can be made a t a time?:

#show voice dsp group all
DSP groups on slot 0:
dsp 1:
  State: UP, firmware: 4.4.801
  Max signal/voice channel: 16/16
  Max credits: 240
  Group: FLEX_GROUP_VOICE, complexity: FLEX
    Shared credits: 165, reserved credits: 0
    Signaling channels allocated: 16
    Voice channels allocated: 5
    Credits used: 75
    Voice channels:
      Ch01: voice port: 0/0/0:23.23, codec: g711ulaw, credits allocated: 15
      Ch02: voice port: 0/0/0:23.1, codec: g711ulaw, credits allocated: 15
      Ch03: voice port: 0/0/0:23.2, codec: g711ulaw, credits allocated: 15
      Ch04: voice port: 0/0/0:23.21, codec: g711ulaw, credits allocated: 15
      Ch06: voice port: , codec: None, credits allocated: 15

dsp 5:
  State: UP, firmware: 4.4.801
  Max signal/voice channel: 16/16
  Max credits: 240
  Group: FLEX_GROUP_VOICE, complexity: FLEX
    Shared credits: 240, reserved credits: 0
    Signaling channels allocated: 7
    Voice channels allocated: 0
    Credits used: 0

DSP groups on slot 1:
 This command is not applicable to slot 1

DSP groups on slot 2:
 This command is not applicable to slot 2

[Brandon Buffin · Accepted solution]

Yes, 16 voice channels or simultaneous calls. I'm assuming this is a PVDM2-16? Take a look at the following document for further explanation regarding the output.

https://supportforums.cisco.com/document/123061/understanding-output-show-voice-dsp-group-all

Brandon

[MariusK01]

Thanks,

well it is T1 which is supposed to handle 24 voice channels. so I guess configuration is slightly off?  But I can see dsp1 and dsp5 both are having 16 each ? 

[Brandon Buffin]

Assuming PRI? PRI is 23 voice channels and 1 signalling channel. Between the 2 DSPs you should have enough resources.

The DSP calculator is a helpful tool for determining the necessary resources based on router, IOS, number of channels needed, etc.

http://www.cisco.com/web/applicat/dsprecal/dsp_calc.html

Brandon

[MariusK01]

Looks like my model is not in the list. Probably way outdated.. :)

vgw5#show ver
Cisco IOS Software, 2800 Software (C2800NM-IPVOICE-M), Version 12.4(1a), RELEASE SOFTWARE (fc2)

[MariusK01]

I wonder what are those voice channel allocations mean.. because dsp1 has 6 voice channels allocated and dsp5 - only 2.

[Brandon Buffin]

From your post above I see 5 voice channels allocated for dsp1 and none for dsp2. Looks like you have channels configured for port 0/0/0. Partial PRI?

[MariusK01]

ok, I've just figured that these numbers seem to change every in a while by running 'show voice dsp group all'. so probably that's being allocated automatically.

[Jaime Valencia]

It would be easier if you just post your sh run

[MariusK01]

here it is:

vgw5#show run
Building configuration...

Current configuration : 4526 bytes
!

!
version 12.4
service timestamps debug datetime msec localtime
service timestamps log datetime msec localtime
service password-encryption
!
hostname vgw5
!
boot-start-marker
boot system flash c2800nm-ipvoice-mz.124-1a.bin
boot-end-marker
!
logging buffered 128000 debugging
enable secret 5 xxxxx
enable password 7 xxxx
!
aaa new-model
!
!
aaa group server radius RADIUS-NPS
 server-private 10.1.4.241 auth-port 1812 acct-port 1813 key 7 xxxx
 server-private xxx auth-port 1812 acct-port 1813 key 7 xxxx
!
aaa authentication login default local group RADIUS-NPS
aaa authorization exec default local group RADIUS-NPS
!
aaa session-id common
!
resource policy
!
clock timezone EDT -4
network-clock-participate wic 0
network-clock-select 1 T1 0/0/0
ip subnet-zero
!
!
ip cef
no ip dhcp use vrf connected
!
!
isdn switch-type primary-ni
!
voice-card 0
 no dspfarm
!
!
!
voice service voip
 h323
 sip
!
!
voice class codec 1
 codec preference 1 g711ulaw
 codec preference 2 g711alaw
!
!
!
!
!
!
!
voice statistics type csr
voice statistics time-range since-reset
!
!
username manager password 7 xxxxx
!
!
controller T1 0/0/0
 framing esf
 linecode b8zs
 cablelength short 133
 pri-group timeslots 1-24
 description  PRI
!
translation-rule 1
 Rule 1 ^1.% 91
 Rule 2 ^2.% 92
 Rule 3 ^358.% 9011358
 Rule 4 ^3.% 93
 Rule 5 ^44.% 901144
 Rule 6 ^4.% 94
 Rule 7 ^5.% 95
 Rule 8 ^6.% 96
 Rule 9 ^7.% 97
 Rule 10 ^8.% 98
!
gw-accounting syslog
!
!
!
interface FastEthernet0/0
 ip address xxxx
 duplex auto
 speed auto
 no mop enabled
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/0/0:23
 no ip address
 isdn switch-type primary-ni
 isdn incoming-voice voice
 isdn map address .* plan unknown type unknown
 isdn T310 60000
 no cdp enable
!
interface Service-Engine1/0
 ip unnumbered FastEthernet0/0
 shutdown
 service-module ip address xxxxx
 service-module ip default-gateway xxx
!

!
no ip http server
!
logging xxx
access-list 57 permit xxx
snmp-server community xxx RO
snmp-server location xxxx
!
!
!
control-plane
!
!
!
call filter match-list 1 voice
!
voice-port 0/0/0:23
!
!
!
!
!
dial-peer voice 1 pots
 destination-pattern 9T
 progress_ind alert enable 8
 progress_ind progress enable 8
 incoming called-number 2...
 direct-inward-dial
 port 0/0/0:23
!
dial-peer voice 911 pots
 destination-pattern 9911
 progress_ind alert enable 8
 progress_ind progress enable 8
 direct-inward-dial
 port 0/0/0:23
 prefix 911
!
dial-peer voice 11 voip
 destination-pattern 2...
 progress_ind setup enable 3
 translate-outgoing calling 1
 voice-class codec 1
 session target ipv4:xxxxx
 incoming called-number .
 dtmf-relay h245-alphanumeric
 no vad
!
dial-peer voice 2 pots
 destination-pattern 9T
 progress_ind alert enable 8
 progress_ind progress enable 8
 incoming called-number 4...
 direct-inward-dial
 port 0/0/0:23
!
dial-peer voice 12 voip
 destination-pattern 4...
 progress_ind setup enable 3
 translate-outgoing calling 1
 voice-class codec 1
 session target ipv4:xxxxx
 incoming called-number .
 dtmf-relay h245-alphanumeric
 no vad
!
dial-peer voice 3 pots
 destination-pattern 9T
 progress_ind alert enable 8
 progress_ind progress enable 8
 incoming called-number 5...
 direct-inward-dial
 port 0/0/0:23
!
dial-peer voice 13 voip
 destination-pattern 5...
 progress_ind setup enable 3
 translate-outgoing calling 1
 voice-class codec 1
 session target ipv4:xxxx
 incoming called-number .
 dtmf-relay h245-alphanumeric
 no vad
!
!
call-manager-fallback
 secondary-dialtone 9
 max-conferences 8 gain -6
 timeouts interdigit 5
 ip source-address 10.6.1.251 port 2000
 max-ephones 42
 max-dn 60
 voicemail 2390
 moh music-on-hold.au
 time-format 24
 date-format dd-mm-yy
!
!
line con 0
line aux 0
line 66
 no activation-character
 no exec
 transport preferred none
 transport input all
 transport output all
line vty 0 4
 exec-timeout 30 0
 password xxxxxx
!
scheduler allocate 20000 1000
ntp master
!
end

[Jaime Valencia · Accepted solution]

You only have a PRI, so that's 23 channels, 23 calls.

controller T1 0/0/0
 framing esf
 linecode b8zs
 cablelength short 133
 pri-group timeslots 1-24
 description  PRI

[MariusK01]

but you are right it is on 0/0/0 and PRI.. :

vgw5#show controller T1 0/0/0
T1 0/0/0 is up.
  Applique type is Channelized T1
  Cablelength is short 133
  Description: PRI
  No alarms detected.
  alarm-trigger is not set
  Version info Firmware: 20041023, FPGA: 16, spm_count = 0
  Framing is ESF, Line Code is B8ZS, Clock Source is Line.
  CRC Threshold is 320. Reported from firmware  is 320.