Cisco VG Series Gateways

Cisco VG350 High Density Analog Voice Gateway

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Frequently Asked Questions

Q. What is the difference between Cisco ® VG224 and V350 Analog Voice Gateways?
A. Cisco VG224 is a medium-density gateway with 24 FXS ports. Cisco VG350 is a modular high-density analog voice gateway. It supports two new service modules, SM-D-72FXS and SM-D-48FXS-E. SM-D-72FXS module is a high-density FXS service module with support for 72 FXS ports (the first four ports (0-3) are OPX-Lite capable). SM-D-48FXS-E service module supports 48 FXS ports, with OPX-Lite capability supported on all 48 ports. Both service modules, as well as VG224, use RJ21 connectors to access FXS ports. When comparing features, VG350 is similar to VG224. Cisco also offers VG202 and VG204 for low-density applications. You can compare these gateways here:
Q. Is VG350 interoperable with Cisco Unified Communications Manager (Cisco UCM)?
A. Yes, VG350 is interoperable with Cisco UCM. For more details on version compatibility, please refer to the VG350 data sheet.
Q. Does VG350 support Cisco Unified Communications Manager Express (Cisco Unified CME)?
A. Cisco VG350 does not support Cisco Unified CME natively, as it is a standalone gateway. The FXS ports on VG350 can be configured as SCCP ports, and registered to a separate Cisco 2900 or 3900 series Integrated Services Router Generation 2 (ISR G2) running Unified CME.
Q. Is VG350 interoperable with Cisco Unified CME?
A. Yes, VG350 is interoperable with Cisco Unified CME. For more details on version compatibility, please refer to the VG350 data sheet.
Q. Does VG350 support all Unified CME features as a Skinny Call Control Protocol (SCCP) device?
A. VG350 does not support the following features on Cisco Unified CME:

Completion of Calls to Busy Subscribers (CCBS): When a calling party receives a busy tone, the caller can request that the call complete when the busy destination hangs up the phone and becomes available

Completion of Calls on No Reply (CCNR): When a calling party receives no answer at the destination, the calling party can request that the call complete after the activity occurs on the phone of the called party

CCBS and CCNR are supported using Cisco Unfied Communications Manager.

Q. Does VG350 support Survivable Remote Site Telephony (SRST)?
A. Cisco VG350 does not support SRST natively. VG350 is a dedicated analog line-side gateway. A separate 2900 or 3900 Series ISR G2 router running SRST is required for VG350 analog ports to failover (only SCCP ports support SRST failover).
Q. Does VG350 support Secure Real-Time Transport Protocol (SRTP)?
A. Yes, VG350 supports SRTP for highly secure media and TLS for highly secure signaling. An additional security license (SL-VG350-SEC-K9) is requried.
Q. Does VG350 support Simplified Message Desk Interface (SMDI)?
A. No.
Q. What voltage does VG350 use to light message waiting indicators (MWI)?
A. VG350 uses FSK to light MWI lamps up to 100V.
Q. What codecs are supported by the VG350 Analog Phone Gateway?
A. G.711, G.722, G.726, G.728, G.729, iLBC, and iSAC.
Q. Does VG350 support DC power supply?
A. Yes, VG350 supports DC power supply.
Q. Does VG350 support a backup power supply?
A. Yes, VG350 offers redundant power supplies with AC and DC options.
Q. Does VG350 support backup Ethernet connections?
A. VG350 has three 10/100/1000BASE-T ports. These can be used for multihoming configuration for switch failover. These ports can also be used with dynamic routing protocols such as Routing Information Protocol (RIP), Open Shortest Path First (OSPF), and Enhanced Interior Gateway Routing Protocol (EIGRP) for link redundancy on the LAN side. To enable dynamic routing protocols on the LAN side, a data license (SL-VG350-DAT-K9) is required.
Please note that these Ethernet ports cannot be used to connect VG350 to the WAN directly. This is not a supported configuration.
Q. What Cisco IOS Software release is on the Cisco VG350 Analog Gateway?
A. Cisco IOS Software Release 15.2(4)M and above.
Q. What is the distance that VG350 OPX-Lite ports can drive?
A. Cisco VG350 supports two modules: SM-D-72FXS and SM-D-48FXS-E. The first four ports (ports 0-3) on the SM-D-72FXS module can be configured for long loop-length (OPX-Lite), and all 48 ports on the SM-D-48FXS-E support long loop-length (OPX-Lite). In both cases, the OPX-Lite ports can drive up to 11,000 feet using 26AWG wire, and up to 18,000 feet using using 24 AWG wire.
Q. Do I need any special license to enable Secure Shell (SSH)?
A. No, the IP base feature license (SL-VG350-IPB-K9) that is included with VG350 has a built-in SSH feature, and can be configured immediately.
Q. Do the Enhanced High-Speed WAN Interface Card (EHWIC) slots of VG350 support any modules?
A. Yes, the EHWIC slots of VG350 support VIC2-2FXO, VIC2-4FXO, VIC3-2FXS, VIC3-2FXS-E/DID and VIC3-4FXS/DID analog voice cards for additional capacity. VG350 EHWIC slots also support VWIC3 T1/E1 cards for clock synchronization.
Q. Can I plug in T1/E1 voice/WAN interface cards (VWICs) in the EHWIC slots of VG350?
A. Yes, VWIC3 cards are supported with VG350. The T1/E1 VWIC3 cards are supported to source in/out clocking for/from VG350 to help enable end-to-end clock synchronization. Public Switched Telephone Network (PSTN) voice termination on VWIC3 T1/E1 cards is not supported on VG350. The EHWIC slots do support Foreign Exchange Subscriber (FXS) and Foreign Exchange Office (FXO) Virtual Interface Cards (VICs) for additional capacity.
Q. Can I plug in T1/E1 WAN Interface Cards (WICs) in the EHWIC slots of VG350?
A. No, WIC (data) interface cards are not supported with VG350. VG350 is a dedicated high density analog gateway that connects to a LAN, so there is no support for WAN connectivity cards and protocols.
Q. Does Cisco VG350 support any other network modules or service modules in the service module slots?
A. No, the only two service modules that are supported in the service module slots of VG350 are the double-wide SM-D-72FXS and SM-D-48FXS-E.
Q. Does VG350 support lightning surge protection?
A. Yes. VG350 is certified for NEBS GR-1089 NEBS Type 1/3 lightning surge and AC power fault.