MM716 Ringing Current Insufficient for SLC5?

[CChambleeJr]

We have some Avaya analog ports off of a G650/TN793 tied to a SLC5, and fed via fiber mux to distant end analog users. This arrangement works well. However, if we move some of the local side analog lines from the G650/TN793 analog card to a G450/MM716 analog card, the distant end analog devices won't ring when calls sent to them. Anyone else seen this issue and know any way to resolve it?

===
Chuck Chamblee
ACSS (CM) | CTP | A+

 

[losfep]

I had a similar problem and added a MM711 8 port analog. this resolved my issue with the ringing.

 

[CChambleeJr]

Interesting, but makes sense. Apparently, there are some design limitations on the 24-port MM716 that impose current limitations per port. Since the MM711 only has to support 8 ports, they may be able to provide more current per port. I also read that there are only a certain number of ports on the 716 that be rung simultaneously. That figures in with the current limitations. Thanks for the reply!

===
Chuck Chamblee
ACSS (CM) | CTP | A+

 

[AvayaTier3]

MM716 Analog Media Module
The MM716 provides 24 analog ports supporting telephones, modem, and fax. These ports can
also be configured as DID trunks with either wink-start or immediate-start. The 24 ports are
provided through a 25 pair RJ21X amphenol connector, which can be connected by an
amphenol cable to a breakout box or punch down block.
The MM716 provides you with the capability to configure any of the 24 ports as:
• Analog tip/ring devices such as single-line telephones with or without LED message
waiting indication
• A wink-start or an immediate-start DID trunk
The MM716 Analog Media Module also supports:
• Three ringer loads, which is the ringer equivalency number, for all ports, for the following
loop lengths:
- 20,000 feet (6096 meters) over 0.65 mm (.025 in.) wire (22 AWG)
- 16,000 feet (4877 meters) over 0.5 mm (.02 in.) wire (24 AWG)
- 10,000 feet (3048 meters) over 0.4 mm (.016 in.) wire (26 AWG)
At .1 or less REN ringer loads, the supported loop length is 20,000 feet (6096 meters) at 22,
24, and 26 AWG.
• Up to 24 simultaneously-ringing ports
• Type 1 caller ID
• Ring voltage generation for a variety of international frequencies and cadences
The MM716 is compatible with Avaya Communication Manager Release 3.1 and higher, and
branch gateway firmware version 25.0.0 and higher.

A great teacher, does not provide answers, but methods to teach others "How and where to find the answers"

bsh

40 years Bell, AT&T, Lucent, Avaya
Tier 3 for 30 years and counting
[URL unfurl="true"]http://bshtele.com[/url]

 

[AvayaTier3]

MM711 Analog Media Module
The Avaya MM711 Analog Media Module provides features and functionality for analog trunks
and telephones.
Figure 82: Avaya MM711 Analog Media Module
Note:
Note: The MM711 is supported in the G700, G450, G430, and G350 Media Gateways.
Detailed description
The MM711 provides you with the capability to configure any of the eight ports of this analog
circuit pack as:
• A loop start or a ground start central office trunk with a loop current of 18 to 120 mA.
• A wink-start or an immediate-start Analog Direct Inward Dialing (DID) trunk
• A two-wire analog Outgoing CAMA E911 trunk, for connectivity to the public switched
telephone network (PSTN). MF signaling is supported for CAMA ports.
• Analog tip/ring devices such as single-line telephones with or without LED message
waiting indication.
The MM711 Analog Media Module also supports:
• Three ringer loads, which is the ringer equivalency number, for all eight ports, for the
following loop lengths:
- 20,000 feet (6096 meters) over 0.65 mm (.025 in.) wire (22 AWG)
- 16,000 feet (4877 meters) over 0.5 mm (.02 in.) wire (24 AWG)
- 10,000 feet (3048 meters) over 0.4 mm (.016 in.) wire (26 AWG)
At .1 or less REN ringer loads, the supported loop length is 20,000 feet (6096 meters) at 22,
24, and 26 AWG.
• Up to eight simultaneously-ringing ports
Note:
Note: The media gateway achieves this number of ports by staggering the ringing and
pauses between two sets of up to four ports.
If it has more than four ports, the MM711 also supports:
• Type 1 caller ID and Type 2 caller ID
• Ring voltage generation for a variety of international frequencies and cadences
A hard-wired ground wire is added for each IROB-to-earth ground
External interfaces on the CO trunk side
The following requirements apply to the external interfaces on the CO trunk side:
• The tip and ring default input impedance is 600 ohms. The default impedance can be
configured to accommodate other tip and ring impedances. One such impedance is the
900 ohms that is used in Brazil. Another is the complex impedance that is used in the
European Union.
• A hard-wired ground wire is added for each IROB-to-earth ground.
• The MM711 supports DTMF, MF, and pulsing.
• The MM711 supports R2MFC address signaling, and provides -48 VDC for ports that are
set up as direct inward dialing (DID).
• Acceptable loop range for the CO trunk is 18 to 60 mA
• The MM711 supports direct inward and outward dialing (DIOD) for Japan.
The following trunk types are supported:
• Loop-start and ground-start CO trunks
• DID
• CAMA
Caller ID
The MM711 Analog Media Module supports incoming caller ID (ICLID) on analog CO loop-start
trunks for all supported countries that require this feature. The MM711 supports Type 1 caller ID
(CID) devices, and firmware signaling requirements are implemented on a per-port basis. The
firmware supports these formats:
• Single Data Message Format (SDMF)
• Multiple Data Message Format (MDMF)
• Caller ID generation on line ports
The MM711 accommodates on-hook transmission, which is necessary to receive caller ID
signals.
A call can still be terminated on a trunk that is administered for ICLID. The call is terminated
even if there is no ICLID information or error in transmission of ICLID information. Japan is an
exception.
Analog line interface requirements
The MM711 provides pass through for fax signals.
The MM711 supports analog telephone sets with:
• An impedance range of Rs: 215 to 300 ohms, Rp: 750 to 1000 ohms, Cp: 115 to 220 pF
• A ringing frequency range of 20 Hz, 25 Hz, or 50 Hz
• A DC current range of 20 to 60 mA
• A hook flash range of 90 to 1000 ms
Companding
MM711 allows for A- or Mu-law selection at installation. This is a software-selectable capability
that applies to all ports on the MM711.

A great teacher, does not provide answers, but methods to teach others "How and where to find the answers"

bsh

40 years Bell, AT&T, Lucent, Avaya
Tier 3 for 30 years and counting
[URL unfurl="true"]http://bshtele.com[/url]

 

[AvayaTier3]

Get some documentation Chuck

Avaya Aura™ Communication
Manager Hardware Description and
Reference

555-245-207
Issue 8
May 2009


MM714 Analog Media Module
The Avaya MM714 Media Module provides four analog telephone ports and four analog trunk
ports.
Note:
Note: The four analog trunk ports can not be used for analog DID trunks. Instead, the
four analog line ports must be used for analog DID trunks.
Note:
Note: The MM714 is supported in the G700, G450, G430, and G350 Media Gateways.
Detailed description
The MM714 provides you with the capability to configure any of the four trunk ports as:
• A loop start or a ground start central office trunk with a loop current of 18 to 120 mA.
• A two-wire analog Outgoing CAMA E911 trunk, for connectivity to the public switched
telephone network (PSTN). MF signaling is supported for CAMA ports.
The MM714 provides you with the capability to configure any of the four line ports as:
• A wink-start or an immediate-start Analog Direct Inward Dialing (DID) trunk
• Analog tip/ring devices such as single-line telephones with or without LED message
waiting indication.
The MM714 Analog Media Module also supports:
• Three ringer loads, which is the ringer equivalency number, for all four line ports, for the
following loop lengths:
- 20,000 feet (6096 meters) over 0.65 mm (.025 in.) wire (22 AWG)
- 16,000 feet (4877 meters) over 0.5 mm (.02 in.) wire (24 AWG)
- 10,000 feet (3048 meters) over 0.4 mm (.016 in.) wire (26 AWG)
At .1 or less REN ringer loads, the supported loop length is 20,000 feet (6096 meters) at 22,
24, and 26 AWG.
• Up to four simultaneously-ringing ports
• Type 1 caller ID and Type 2 caller ID
• Ring voltage generation for a variety of international frequencies and cadences
A hard-wired ground wire is added for each IROB-to-earth ground
External interfaces on the CO trunk side
The following requirements apply to the external interfaces on the CO trunk side:
• The tip and ring default input impedance is 600 ohms. The default impedance can be
configured to accommodate other tip and ring impedances. One such impedance is the
900 ohms that is used in Brazil. Another is the complex impedance that is used in the
European Union.
• A hard-wired ground wire is added for each IROB-to-earth ground.
• The MM714 supports DTMF, MF, and pulsing.
• The MM714 supports R2MFC address signaling.
• Acceptable loop range for the CO trunk is 18 to 60 mA
• The MM714 supports direct inward and outward dialing (DIOD) for Japan.
Caller ID
The MM714 Analog Media Module supports up to four incoming caller ID (ICLID) on analog CO
loop-start trunks for all supported countries that require this feature. The MM714 supports Type
1 caller ID (CID) devices, and firmware signaling requirements are implemented on a per-port
basis. The firmware supports these formats:
• Single Data Message Format (SDMF)
• Multiple Data Message Format (MDMF)
• Caller ID generation on line ports
The MM714 accommodates on-hook transmission, which is necessary to receive caller ID
signals.
A call can still be terminated on a trunk that is administered for ICLID. The call is terminated
even if there is no ICLID information or error in transmission of ICLID information. Japan is an
exception.
Analog line interface requirements
The MM714 provides pass through for fax signal on its analog line ports.
The MM714 supports up to four analog telephone sets with:
• An impedance range of Rs: 215 to 300 ohms, Rp: 750 to 1000 ohms, Cp: 115 to 220 pF
• A ringing frequency range of 20 Hz, 25 Hz, or 50 Hz
• A DC current range of 20 to 60 mA
• A hook flash range of 90 to 1000 ms
The MM714 provides -48 VDC for ports that are set up as direct inward dialing (DID)
Companding
MM714 allows for A- or Mu-law selection at installation. This is a software-selectable capability
that applies to all ports on the MM714.


A great teacher, does not provide answers, but methods to teach others "How and where to find the answers"

bsh

40 years Bell, AT&T, Lucent, Avaya
Tier 3 for 30 years and counting
[URL unfurl="true"]http://bshtele.com[/url]

 

[CChambleeJr]

I guess I'm missing your point, Tier3. The info relating to ringer loads appears to be identical between the MM716 and the MM711. But I'm just trying to confirm that the MM modules don't provide the same ringing energy as the TN packs. And if that's the case, then I may need to investigate whether or not the MM711's provide a little more juice than the MM716s.

===
Chuck Chamblee
ACSS (CM) | CTP | A+

 

[AvayaTier3]

If you download the documentation and research the hardware documents, you will see that talk battery and ringing voltages, distance limitation for all types of hardware and how many ports on a board can have simultaneous ring.

based on your description of mm716 after your reading, it appears that you missed out on something.

My point is, that if you read the Avaya docmentation, you will not find a better explanation on the forum.

A great teacher, does not provide answers, but methods to teach others "How and where to find the answers"

bsh

40 years Bell, AT&T, Lucent, Avaya
Tier 3 for 30 years and counting
[URL unfurl="true"]http://bshtele.com[/url]

 

[AvayaTier3]

Can you use a volt ohm meter Chuck?

test ac ringing current on stations programmed to each mm711, mm714, mm716, tn742, tn746, tn746B, tn793CP
should be 90 vac ~ 105 vac

Let us know what you see.



A great teacher, does not provide answers, but methods to teach others "How and where to find the answers"

bsh

40 years Bell, AT&T, Lucent, Avaya
Tier 3 for 30 years and counting
[URL unfurl="true"]http://bshtele.com[/url]

 

[CChambleeJr]

MM711 ringing voltage with no load (VOM only) = 69 VAC
MM716 ringing voltage with no load (VOM only) = 69 VAC
TN793 ringing voltage with no load (VOM only) = 83 VAC

The SLC5 line cards aren't detecting the ring coming from the MM cards, but they pick up on the TN packs with no problem. The SLC5 cards are wired to the Avaya MM's with less than 200 feet of 24ga wire, in the same building. We can't compensate for low ring current in the SLC5, either. The voltages read for the MM cards above were taken with all of the other MM cards except for the unit under test removed, just to be sure that it wasn't a power supply issue. By the way, the G450's housing these MM cards are equipped with dual power supplies.


===
Chuck Chamblee
ACSS (CM) | CTP | A+