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APC Power Architecture for Cisco Catalyst Switches Powering IP Phones
When Cisco customers deploy Catalyst 4006, 6509 and 6513 switches to handle both
voice and data traffic, it is essential to provide clean, available power to the networking
infrastructure. This paper provides reference architecture for using APC’s Symmetra RM
UPS to power these switches.
APC Symmetra is a proven N+1 redundant, uninterruptible power supply that provides a
high level of power availability for converged networks and other mission critical
applications. Modular components make Symmetra easy to service. Integrated software
provides a high level of manageability through advanced diagnostics and reporting.
Symmetra’s scalability offers the possibility of a UPS investment that matches the level
of phone deployment.
Please be aware of the following qualification statement and if the assumptions don’t
hold, contact APC for a more appropriate solution.
Qualification
This architecture assumes the customer is:
1. Utilizing Cisco’s in-line power port technology to power IP phones
2. Deploying the Cisco Switch with redundant power supplies and would want a
redundant power solution to match.
3. Planning to fully utilize the phone capacity of the Cisco switch.
4. Customer is deploying the equipment in a 208/120V 60hz environment (like the
United States).
Organization
The rest of this paper is organized into sections for each Catalyst switch with the
corresponding correct Symmetra solution. The section includes a recommended UP S as
well as the recommended power cords for the power supplies within the switch itself.
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Cisco Catalyst 4006 Switch
Fig 2. External Power Shelf
Fig 3. External Power Supply
Fig 1. 4006 Switch
Powering IP phones from the Catalyst 4006 Switch requires the addition of an external
power shelf (Fig 2) and power modules (Fig 3.). The total power draw for a totally
utilized switch is just above 3000 Watts.
Recommended UPS: SYH6KNRMT-P1 (figure 4, 5, and 6 below)
This is a 4.2 KW Symmetra RM UPS with an N+1 Redundant architecture that will
provide ten minutes of runtime at full load. This product requires an L6-30R for input
and ships standard with two L6 -20R, one L6 -30R, and a step down transformer (SYTF2)
with twelve 5-20 outlets. The transformer plugs directly into the output L6-30R. The
customer should order the 4006 switch with NEMA 5-15P plugs for each power supply.
Fig. 4 SYH6KNRMT-P1
Fig. 5 SYH6KNRMT-
Fig. 6 SYTF2 front
and rear
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The Catalyst 6509 Switch offers different power supply
The Catalyst 6513 Switch provides the
–
48 VDC required to
A redundant configuration
Cisco Catalyst 6509 Switch
options (1000W, 1300W, 2500W or 4000W) depending
on the number of phones to be powered. A redundant
solution with 4000W power supplies would draw a
maximum of 4100 Watts.
Recommended UPS: SYH6KNRMT (see fig 4 and 5 above)
Fig 7. 6509 Switch
This is a 4.2 KW Symmetra RM UPS with an N+1 Redundant architecture that will
provide ten minutes of runtime at full load. This product requires a NEMA L6 -30R for
input and ships with standard output of two L6-20R and one L6-30R. The customer
should order the 6509 switch with NEMA L6 -20P plugs for each power supply.
Cisco Catalyst 6513 Switch
power the desktop IP phones directly from the switch itself.
Catalyst 6509 Switch offers different power supply options
(1000W, 1300W, 2500W or 4000W) depending on the
number of phones to be powered.
is recommended.
Recommended UPS: SYP12K12RMT (Figures 9 and 10)
This is an 8.4 KW Symmetra RM UPS with an N+1 Redundant architecture that will
provide ten minutes of runtime at full load. This product requires a hardwired input and
standard output is six L6-20R and three L6-30R. The customer should order the 6509
switch with NEMA L6 -20P plugs for each power supply.
Fig. 9 SYP12K12RMT Front View Fig. 10 SYP12K12RMT Rear View
Fig 8. 6513 Switch
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Further Considerations
Extended runtimes
Symmetra Extended Run Frames (SYRMXR4B4) can be added to the Symmetra RM UPS for up to 4
hours of runtime. These frames are 4U high and are easily added via a hot-installable connector. Up
to seven of these Extended Run Frames can be added to any Symmetra RM UPS. Each SYRMXR4B4
will provide an additional 30 minutes of runtime for the configurations described above.
Multiple switches
Many customer configurations will involve multiple switches in the same equipment room. There are
different methods of providing protection for this scenario including one UPS per switch or one UPS
for the entire room. To size one UPS for multiple switches, add up the total watt rating and APC’s
web-based sizing guide can specify the correct UPS configuration.
Other configurations
Symmetra RM UPS is only one possible choice for providing power protection. Symmetra’s scalable
N+1 redundant design and user-serviceability make it a good first choice for Catalyst Switches.
Certain customers may require different features from their UPS. Some customers for example may
insist on separate UPS and separate power feeds for each Catalyst power supply. Others may not
require any redundancy and just want the most basic UPS that will support the load for five minutes.
HVAC
IP Telephony switches utilizing inline power port technology require much more power than usually
required in an equipment room for data switches. A direct result of this is a much higher heat loss.
This generates a need for good environmental control and ventilation.
Racks
Many of these switches will be replacing current data routers and other networking equipment. These
current devices are typically found in two post racks with small weight bearing capacity. The
Symmetra UPS with extended runtime combined with a couple Catalyst Switches would far exceed the
typical weight capacity of these racks. This plus the heat considerations make a two thousand pound
rated four -post open rack a consideration to replace the older racks.
If the customer insists on retaining the two-post racks, APC can provide this customer with two-post
mounting kits or fl oor mounting kits with casters for the Symmetra RM UPS Family.
Other voltage areas
Customers deploying Cisco equipment in areas with other voltage requirements (i.e. 230V, 50 Hz) will
need different Symmetra skus. The following table serves as a direct replacement for the Symmetra
RM UPS part numbers described in the document above.
Cisco Switch 208/120V 60 Hz 230V 50 Hz 200/100V 60 Hz
4006 SYH6KNRMT-P1 SYH6KNRMI SYH6KNRMJ-P1
6509 SYH6KNRMT SYH6KNRMI SYH6KNRMJ
6513 SY12K12RMT SY12K12RMI SY12K12RMJ
all SYRMXR4B4 SYRMXR4B4I SYRMXR4B4J
4006 SYTF2 N/A SYTF2J
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