clarification about cisco phone 7945 and 7965

[amralrazzaz]

dear i need clarification about some thing 

my manager has cisco phone 7821 he always complain about quality of voice and he cant hear well

we have another phone 7945 installed in our office he tried and its fine .. so now the question is which phone should i order the same one 7945 or 7465 ? and which one is better ?

7945 that we have already is old and there is a new release? or its fine if i order another same one

7465 is latest or there is newer ? 

what should i order ?

i already use cisco manager express cme for configurations and i have 25 seat licenses

can i have your kindly advice 

thanks

[Jaime Valencia]

I'd look into using a different FW and network issues to find out why you have those audio issues, you can use whichever model, that really is up to you and what you need. Have you reviewed the datasheets?

[Ratheesh Kumar]

Hi there

Both 7821 and 7945 are great set of phones. Its up to you which one to go for. 7965 is in fact a same like phone type of 7945 with more additional lines (2 Lines for 7945 & 6 lines for 7965)

If you facing audio quality issues on 7821 you can check the below

• check the sender codec the phone is using (you can get this from accessing the phone ip address from a browser)
• check the port where phone connected to, any errors on switch port
• try upgrading the firmware of the phone
• try changing the coil cord of the phone

You can go thru the ip phone brochure from the below link and compare  different phone models

https://www.cisco.com/c/dam/en_us/solutions/industries/docs/gov/IP_phone_portfolio.pdf

7821

• The 7821 has a 3.5-inch (8.9 cm) graphical, grayscale, 396 x 162 pixel-based display and is backlit.
• It comes standard with an IEEE 10/100 integrated switch to support the traffic from a co-located PC.
• The 2-programmable line/feature keys feature tri-color LEDs that provide call status notification at a glance.
• The 7821 supports the latest security enhancements, including Secure Hash Algorithm 2 (SHA-2) and Transport Layer Security 1.2
• The 7821 is available in charcoal and white. It comes with a 2-position footstand.

7945

• Two programmable backlit line/feature keys for quick access to communications

• A 5-inch (12.7 cm), backlit, high-resolution, 320- x 240-pixel graphical color display

• Wideband audio support on headset, handset, and full-duplex speakerphone

• Integrated IEEE 10/100/1000 switch ports, which support the switching of multimedia traffic from a co-located PC

• Four-way navigation cluster plus a select key, which allow you to scroll vertically and horizontally when

navigating menus and directories

Hope this helps!

Cheers
Rath!

***Please rate helpful posts***

[amralrazzaz]

thanks alot for ur great info , i wanna share the configuration with this phone (the problem is the other side can hear us well but we cant hear them well its very low 

here is the configuration 

voice register dn 7
number 102
call-forward b2bua noan 5 timeout 20
name Walid Hifny
auto-answer
label Walid Hifny
mwi
mobility

!
voice register pool 7
busy-trigger-per-button 1
id mac 5067.AE21.9A74
type 7821
number 1 dn 7
presence call-list
dtmf-relay rtp-nte
codec g711ulaw

snmp-server community public RO
tftp-server flash:kern78xx.10-1-1-9.sbn
tftp-server flash:rootfs78xx.10-1-1-9.sbn
tftp-server flash:sboot78xx.10-1-1-9.sbn
tftp-server flash:sip78xx.10-1-1-9.loads
tftp-server flash:rootf2

thanks

[Dennis Mink]

to check voice qualiy mid call, you can tap the select button twice, this will tell you jitter latency an MOS scroe of a call, you can call the same number from two different types of phones and see if you see a significat difference, or at least quantify the quality of a call.

[R0g22]

What is this "other side" that you are referring to ? Is it ITSP ? Is this intermittent or do you have the issue every time you make a call ? And when you say quality, are you getting a low audio/choppy or robotic audio ? Echo is considered to be a quality issue as well so which of these is your Manager experiencing ?

[amralrazzaz]

other side mean the one who i talk with (the receiver) he can hear me well and cant hear him well

there is no echo just voice is not is very low i cant hear well but they hear me well \

thats it

i tried another phone 7945 the voice is loud and i can hear well 

thats my issue  so, is there is a difference between 7821 and 7945 in level of voice its more loud or same ?

[Ratheesh Kumar]

Hi there

Are you facing this low audio internally or externally.

For 7945, are you finding the good quality while talking to another 7945/7965. Pls check the audio codec of 7945 while talking. (You can double click the ? on the phone during an active call).

If its g722 definitely the audio quality will be great 

Now check the 7821. You can browse the IP address of the phone and see it on the active stream, or check the gateway. show call active voice

There is an issue related with 78XX/88XX causing audio quality problems while OPUS codec is used, (but in CUCM) CSCvc76073

Hope this helps!

Cheers
Rath!

***Please rate helpful posts***

[amralrazzaz]

codec  g711u 

the config for one phone 

voice register dn 14
number 110
name Karim Habib
label Karim Habib
mwi

voice register pool 14
busy-trigger-per-button 1
id mac 5067.AE21.4DF7
type 7821
number 1 dn 14
presence call-list
dtmf-relay rtp-nte
codec g711ulaw

i tried the 7945 to check the codec already g711u 

my manager check call with 7945 he said great voice 

[R0g22]

Yeah your codec is fine. I don't believe opus is yet supported on CME. Having said that, the different b/w the two phones is basically a different protocol and a different firmware taken the fact that you are using SCCP for 79XX.
Also with SCCP, the underlying technology is still POTS. It is not VoIP.
Since you did not tell what is the PSTN/ITSP termination, I am assuming POTS. Try to increase the input gain on the voice-port and see if it helps.
Apart from that, a firmware upgrade to the latest available is recommended. Last resort would be a pcap, taken the fact that it is a ITSP termination.

[amralrazzaz]

dear which is better g729 or g711 ?

im using g711 but they recommend me here to try g722-64k but not working when im calling give me busy tone

i tried to switch one of ip phone to g729 and its working fine 

but which is better is voice quality and level of sound is better ?

[Ratheesh Kumar]

Hi there

Could you try forcing G.722-64K codec for the 7821 phone and other phone and do the tests

1.    enable 

2.    configure terminal 

3.    ephone ephone-tag or voice register pool pool-tag

4.    codec codec-type 

5.    end 

you can also enable G.722-64K codec globally

Restriction: If G.722-64K codec is configured globally and a phone does not support the codec, the fallback codec is G.711ulaw.

1.    enable 

2.    configure terminal 

3.    telephony-service 

4.    codec {g711-ulaw | g722-64k} 

5.    service phone g722CodecSupport {0 | 1 | 2} 

6.    end 

Hope this helps!

Cheers
Rath!

***Please rate helpful posts***

[amralrazzaz]

dear i changed the codec for one 7821  like below

voice register pool 8
busy-trigger-per-button 1
id mac 5067.AE21.9A5A
type 7821
number 1 dn 8
cor incoming mobile-long default
no digit collect kpml
presence call-list
dtmf-relay rtp-nte
codec g722-64

its not working the phone didnt complete the number i dial and giving me busy tone 

also on 2nd part i change the following for 9745 : but not effected it same g711

telephony-service
codec g722-64
max-ephones 58
max-dn 64
ip source-address 192.168.2.207 port 2000
service phone g722CodecSupport 2
url services http://10.1.10.1/voiceview/common/login.do
url authentication http://10.1.10.1/voiceview/authentication/authenticate.do
max-conferences 8 gain -6
web admin system name romani password cisco
web admin customer name romani1 password cisco
dn-webedit
time-webedit
transfer-system full-consult dss
create cnf-files version-stamp Jan 01 2002 00:00:00

ephone-dn 1 dual-line
number 111 no-reg primary
label 111
description Mr. Amr Ismaeil
name Mr. Amr Ismaeil
!
!
!phone 1
ephone 2
codec g722-64CE8.5DC8.D374
!username "aa"
!paging-dn 1
!type 7945
ephone 51:1
codec g722-64
!--More--
!
!

i dont know what happen .. its creating more

more ephone and previous before change is only one like before on below :

ephone-dn 1 dual-line
number 111 no-reg primary
label 111
description Mr. Jeries Alghwaly
name Mr. Jeries Alghwaly
!
!
ephone 1
video
mac-address 1CE8.5DC8.D374
username "aa"
paging-dn 1
type 7945
button 1:1
pin 4100
!
!
!
ephone 2
!
!
!
ephone 5

the

[amralrazzaz]

i back it to the previous config by no codec on telephone-service and ephone 1

but now what i will do 

[amralrazzaz]

i changed one of the phone codec from g711 to g722 under voice register pool and when i try to call gives me busy tone 

note: i upgraded the firmware to sip78xx.12-1-1-12 recently 

so the phone is not supporting this codec or i miss configuration or what ?

 also which one u prefer me to use 

Router(config-register-pool)#codec ?
g711alaw Use G.711 Alaw
g711ulaw Use G.711 ulaw
g722-64K Use G722-64K 64000 bps
g729r8 Use G.729
ilbc Use iLBC 13330 or 15200 bps

my location is africa egypt 

thanks